annotate planemo/lib/python3.7/site-packages/rdflib/plugins/sparql/parser.py @ 1:56ad4e20f292 draft

"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 """
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2 SPARQL 1.1 Parser
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3
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4 based on pyparsing
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5 """
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6
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7 import sys
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8 import re
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9
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10 from pyparsing import (
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11 Literal, Regex, Optional, OneOrMore, ZeroOrMore, Forward,
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12 ParseException, Suppress, Combine, restOfLine, Group,
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13 ParseResults, delimitedList)
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14 from pyparsing import CaselessKeyword as Keyword # watch out :)
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15 # from pyparsing import Keyword as CaseSensitiveKeyword
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16
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17 from .parserutils import Comp, Param, ParamList
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18
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19 from . import operators as op
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20 from rdflib.py3compat import decodeUnicodeEscape, bytestype
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21
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22 import rdflib
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23
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24 DEBUG = False
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25
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26 # ---------------- ACTIONS
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27
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28
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29 def neg(literal):
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30 return rdflib.Literal(-literal, datatype=literal.datatype)
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31
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32
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33 def setLanguage(terms):
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34 return rdflib.Literal(terms[0], lang=terms[1])
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35
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36
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37 def setDataType(terms):
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38 return rdflib.Literal(terms[0], datatype=terms[1])
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39
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40
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41 def expandTriples(terms):
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42
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43 """
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44 Expand ; and , syntax for repeat predicates, subjects
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45 """
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46 # import pdb; pdb.set_trace()
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47 try:
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48 res = []
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49 if DEBUG:
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50 print("Terms", terms)
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51 l = len(terms)
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52 for i, t in enumerate(terms):
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53 if t == ',':
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54 res.extend([res[-3], res[-2]])
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55 elif t == ';':
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56 if i+1 == len(terms) or terms[i+1] == ";" or terms[i+1] == ".":
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57 continue # this semicolon is spurious
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58 res.append(res[-3])
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59 elif isinstance(t, list):
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60 # BlankNodePropertyList
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61 # is this bnode the object of previous triples?
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62 if (len(res) % 3) == 2:
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63 res.append(t[0])
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64 # is this a single [] ?
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65 if len(t) > 1:
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66 res += t
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67 # is this bnode the subject of more triples?
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68 if i + 1 < l and terms[i + 1] not in ".,;" :
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69 res.append(t[0])
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70 elif isinstance(t, ParseResults):
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71 res += t.asList()
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72 elif t != '.':
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73 res.append(t)
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74 if DEBUG:
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75 print(len(res), t)
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76 if DEBUG:
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77 import json
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78 print(json.dumps(res, indent=2))
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79
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80 return res
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81 # print res
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82 # assert len(res)%3 == 0, \
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83 # "Length of triple-list is not divisible by 3: %d!"%len(res)
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84
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85 # return [tuple(res[i:i+3]) for i in range(len(res)/3)]
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86 except:
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87 if DEBUG:
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88 import traceback
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89 traceback.print_exc()
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90 raise
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91
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92
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93 def expandBNodeTriples(terms):
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94 """
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95 expand [ ?p ?o ] syntax for implicit bnodes
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96 """
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97 # import pdb; pdb.set_trace()
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98 try:
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99 if DEBUG:
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100 print("Bnode terms", terms)
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101 print("1", terms[0])
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102 print("2", [rdflib.BNode()] + terms.asList()[0])
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103 return [expandTriples([rdflib.BNode()] + terms.asList()[0])]
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104 except Exception as e:
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105 if DEBUG:
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106 print(">>>>>>>>", e)
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107 raise
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108
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109
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110 def expandCollection(terms):
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111 """
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112 expand ( 1 2 3 ) notation for collections
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113 """
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114 if DEBUG:
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115 print("Collection: ", terms)
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116
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117 res = []
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118 other = []
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119 for x in terms:
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120 if isinstance(x, list): # is this a [ .. ] ?
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121 other += x
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122 x = x[0]
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123
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124 b = rdflib.BNode()
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125 if res:
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126 res += [res[-3], rdflib.RDF.rest, b, b, rdflib.RDF.first, x]
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127 else:
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128 res += [b, rdflib.RDF.first, x]
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129 res += [b, rdflib.RDF.rest, rdflib.RDF.nil]
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130
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131 res += other
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132
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133 if DEBUG:
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134 print("CollectionOut", res)
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135 return [res]
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136
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137
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138 # SPARQL Grammar from http://www.w3.org/TR/sparql11-query/#grammar
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139 # ------ TERMINALS --------------
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140 # [139] IRIREF ::= '<' ([^<>"{}|^`\]-[#x00-#x20])* '>'
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141 IRIREF = Combine(Suppress('<') + Regex(r'[^<>"{}|^`\\%s]*' % ''.join(
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142 '\\x%02X' % i for i in range(33))) + Suppress('>'))
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143 IRIREF.setParseAction(lambda x: rdflib.URIRef(x[0]))
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144
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145 # [164] P_CHARS_BASE ::= [A-Z] | [a-z] | [#x00C0-#x00D6] | [#x00D8-#x00F6] | [#x00F8-#x02FF] | [#x0370-#x037D] | [#x037F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
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146
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147 if sys.maxunicode == 0xffff:
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148 # this is narrow python build (default on windows/osx)
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149 # this means that unicode code points over 0xffff are stored
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150 # as several characters, which in turn means that regex character
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151 # ranges with these characters do not work.
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152 # See
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153 # * http://bugs.python.org/issue12729
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154 # * http://bugs.python.org/issue12749
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155 # * http://bugs.python.org/issue3665
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156 #
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157 # Here we simple skip the [#x10000-#xEFFFF] part
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158 # this means that some SPARQL queries will not parse :(
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159 # We *could* generate a new regex with \U00010000|\U00010001 ...
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160 # but it would be quite long :)
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161 #
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162 # in py3.3 this is fixed
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163
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164 PN_CHARS_BASE_re = 'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD'
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165 else:
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166 # wide python build
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167 PN_CHARS_BASE_re = 'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD\U00010000-\U000EFFFF'
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168
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169 # [165] PN_CHARS_U ::= PN_CHARS_BASE | '_'
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170 PN_CHARS_U_re = '_' + PN_CHARS_BASE_re
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171
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172 # [167] PN_CHARS ::= PN_CHARS_U | '-' | [0-9] | #x00B7 | [#x0300-#x036F] | [#x203F-#x2040]
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173 PN_CHARS_re = '\\-0-9\u00B7\u0300-\u036F\u203F-\u2040' + PN_CHARS_U_re
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174 # PN_CHARS = Regex(u'[%s]'%PN_CHARS_re, flags=re.U)
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175
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176 # [168] PN_PREFIX ::= PN_CHARS_BASE ((PN_CHARS|'.')* PN_CHARS)?
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177 PN_PREFIX = Regex(r'[%s](?:[%s\.]*[%s])?' % (PN_CHARS_BASE_re,
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178 PN_CHARS_re, PN_CHARS_re), flags=re.U)
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179
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180 # [140] PNAME_NS ::= PN_PREFIX? ':'
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181 PNAME_NS = Optional(
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182 Param('prefix', PN_PREFIX)) + Suppress(':').leaveWhitespace()
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183
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184 # [173] PN_LOCAL_ESC ::= '\' ( '_' | '~' | '.' | '-' | '!' | '$' | '&' | "'" | '(' | ')' | '*' | '+' | ',' | ';' | '=' | '/' | '?' | '#' | '@' | '%' )
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185
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186 PN_LOCAL_ESC_re = '\\\\[_~\\.\\-!$&"\'()*+,;=/?#@%]'
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187 #PN_LOCAL_ESC = Regex(PN_LOCAL_ESC_re) # regex'd
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188 #PN_LOCAL_ESC.setParseAction(lambda x: x[0][1:])
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189
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190 # [172] HEX ::= [0-9] | [A-F] | [a-f]
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191 # HEX = Regex('[0-9A-Fa-f]') # not needed
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192
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193 # [171] PERCENT ::= '%' HEX HEX
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194 PERCENT_re = '%[0-9a-fA-F]{2}'
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195 #PERCENT = Regex(PERCENT_re) # regex'd
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196 #PERCENT.setParseAction(lambda x: unichr(int(x[0][1:], 16)))
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197
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198 # [170] PLX ::= PERCENT | PN_LOCAL_ESC
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199 PLX_re = '(%s|%s)'%(PN_LOCAL_ESC_re,PERCENT_re)
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200 #PLX = PERCENT | PN_LOCAL_ESC # regex'd
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201
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202
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203 # [169] PN_LOCAL ::= (PN_CHARS_U | ':' | [0-9] | PLX ) ((PN_CHARS | '.' | ':' | PLX)* (PN_CHARS | ':' | PLX) )?
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204
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205 PN_LOCAL = Regex(r"""([%(PN_CHARS_U)s:0-9]|%(PLX)s)
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206 (([%(PN_CHARS)s\.:]|%(PLX)s)*
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207 ([%(PN_CHARS)s:]|%(PLX)s) )?"""%dict(PN_CHARS_U=PN_CHARS_U_re,
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208 PN_CHARS=PN_CHARS_re,
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209 PLX=PLX_re), flags=re.X|re.UNICODE)
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210
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211 def _hexExpand(match):
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212 return chr(int(match.group(0)[1:], 16))
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213
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214 PN_LOCAL.setParseAction(lambda x: re.sub("(%s)"%PERCENT_re, _hexExpand, x[0]))
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215
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216
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217
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218
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219 # [141] PNAME_LN ::= PNAME_NS PN_LOCAL
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220 PNAME_LN = PNAME_NS + Param('localname', PN_LOCAL.leaveWhitespace())
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221
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222 # [142] BLANK_NODE_LABEL ::= '_:' ( PN_CHARS_U | [0-9] ) ((PN_CHARS|'.')* PN_CHARS)?
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223 BLANK_NODE_LABEL = Regex(r'_:[0-9%s](?:[\.%s]*[%s])?' % (
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224 PN_CHARS_U_re, PN_CHARS_re, PN_CHARS_re), flags=re.U)
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225 BLANK_NODE_LABEL.setParseAction(lambda x: rdflib.BNode(x[0]))
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226
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227
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228 # [166] VARNAME ::= ( PN_CHARS_U | [0-9] ) ( PN_CHARS_U | [0-9] | #x00B7 | [#x0300-#x036F] | [#x203F-#x2040] )*
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229 VARNAME = Regex('[%s0-9][%s0-9\u00B7\u0300-\u036F\u203F-\u2040]*' % (
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230 PN_CHARS_U_re, PN_CHARS_U_re), flags=re.U)
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231
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232 # [143] VAR1 ::= '?' VARNAME
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233 VAR1 = Combine(Suppress('?') + VARNAME)
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234
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235 # [144] VAR2 ::= '$' VARNAME
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236 VAR2 = Combine(Suppress('$') + VARNAME)
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237
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238 # [145] LANGTAG ::= '@' [a-zA-Z]+ ('-' [a-zA-Z0-9]+)*
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239 LANGTAG = Combine(Suppress('@') + Regex('[a-zA-Z]+(?:-[a-zA-Z0-9]+)*'))
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240
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241 # [146] INTEGER ::= [0-9]+
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242 INTEGER = Regex(r"[0-9]+")
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243 # INTEGER.setResultsName('integer')
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244 INTEGER.setParseAction(
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245 lambda x: rdflib.Literal(x[0], datatype=rdflib.XSD.integer))
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246
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247 # [155] EXPONENT ::= [eE] [+-]? [0-9]+
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248 EXPONENT_re = '[eE][+-]?[0-9]+'
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249
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250 # [147] DECIMAL ::= [0-9]* '.' [0-9]+
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251 DECIMAL = Regex(r'[0-9]*\.[0-9]+') # (?![eE])
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252 # DECIMAL.setResultsName('decimal')
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253 DECIMAL.setParseAction(
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254 lambda x: rdflib.Literal(x[0], datatype=rdflib.XSD.decimal))
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255
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256 # [148] DOUBLE ::= [0-9]+ '.' [0-9]* EXPONENT | '.' ([0-9])+ EXPONENT | ([0-9])+ EXPONENT
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257 DOUBLE = Regex(
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258 r'[0-9]+\.[0-9]*%(e)s|\.([0-9])+%(e)s|[0-9]+%(e)s' % {'e': EXPONENT_re})
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259 # DOUBLE.setResultsName('double')
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260 DOUBLE.setParseAction(
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261 lambda x: rdflib.Literal(x[0], datatype=rdflib.XSD.double))
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262
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263
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264 # [149] INTEGER_POSITIVE ::= '+' INTEGER
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265 INTEGER_POSITIVE = Suppress('+') + INTEGER.copy().leaveWhitespace()
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266 INTEGER_POSITIVE.setParseAction(lambda x: rdflib.Literal(
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267 "+"+x[0], datatype=rdflib.XSD.integer))
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268
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269 # [150] DECIMAL_POSITIVE ::= '+' DECIMAL
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270 DECIMAL_POSITIVE = Suppress('+') + DECIMAL.copy().leaveWhitespace()
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271
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272 # [151] DOUBLE_POSITIVE ::= '+' DOUBLE
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273 DOUBLE_POSITIVE = Suppress('+') + DOUBLE.copy().leaveWhitespace()
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274
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275 # [152] INTEGER_NEGATIVE ::= '-' INTEGER
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276 INTEGER_NEGATIVE = Suppress('-') + INTEGER.copy().leaveWhitespace()
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277 INTEGER_NEGATIVE.setParseAction(lambda x: neg(x[0]))
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278
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279 # [153] DECIMAL_NEGATIVE ::= '-' DECIMAL
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280 DECIMAL_NEGATIVE = Suppress('-') + DECIMAL.copy().leaveWhitespace()
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281 DECIMAL_NEGATIVE.setParseAction(lambda x: neg(x[0]))
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282
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283 # [154] DOUBLE_NEGATIVE ::= '-' DOUBLE
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284 DOUBLE_NEGATIVE = Suppress('-') + DOUBLE.copy().leaveWhitespace()
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285 DOUBLE_NEGATIVE.setParseAction(lambda x: neg(x[0]))
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286
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287 # [160] ECHAR ::= '\' [tbnrf\"']
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288 # ECHAR = Regex('\\\\[tbnrf"\']')
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289
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290
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291 # [158] STRING_LITERAL_LONG1 ::= "'''" ( ( "'" | "''" )? ( [^'\] | ECHAR ) )* "'''"
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292 # STRING_LITERAL_LONG1 = Literal("'''") + ( Optional( Literal("'") | "''"
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293 # ) + ZeroOrMore( ~ Literal("'\\") | ECHAR ) ) + "'''"
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294 STRING_LITERAL_LONG1 = Regex(r"'''((?:'|'')?(?:[^'\\]|\\['ntbrf\\]))*'''")
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295 STRING_LITERAL_LONG1.setParseAction(
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296 lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][3:-3])))
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297
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298 # [159] STRING_LITERAL_LONG2 ::= '"""' ( ( '"' | '""' )? ( [^"\] | ECHAR ) )* '"""'
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299 # STRING_LITERAL_LONG2 = Literal('"""') + ( Optional( Literal('"') | '""'
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300 # ) + ZeroOrMore( ~ Literal('"\\') | ECHAR ) ) + '"""'
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301 STRING_LITERAL_LONG2 = Regex(r'"""(?:(?:"|"")?(?:[^"\\]|\\["ntbrf\\]))*"""')
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302 STRING_LITERAL_LONG2.setParseAction(
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303 lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][3:-3])))
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304
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305 # [156] STRING_LITERAL1 ::= "'" ( ([^#x27#x5C#xA#xD]) | ECHAR )* "'"
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306 # STRING_LITERAL1 = Literal("'") + ZeroOrMore(
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307 # Regex(u'[^\u0027\u005C\u000A\u000D]',flags=re.U) | ECHAR ) + "'"
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308
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309 STRING_LITERAL1 = Regex(
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310 r"'(?:[^'\n\r\\]|\\['ntbrf\\])*'(?!')", flags=re.U)
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311 STRING_LITERAL1.setParseAction(
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312 lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][1:-1])))
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313
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314 # [157] STRING_LITERAL2 ::= '"' ( ([^#x22#x5C#xA#xD]) | ECHAR )* '"'
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315 # STRING_LITERAL2 = Literal('"') + ZeroOrMore (
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316 # Regex(u'[^\u0022\u005C\u000A\u000D]',flags=re.U) | ECHAR ) + '"'
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317
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318 STRING_LITERAL2 = Regex(
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319 r'"(?:[^"\n\r\\]|\\["ntbrf\\])*"(?!")', flags=re.U)
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320 STRING_LITERAL2.setParseAction(
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321 lambda x: rdflib.Literal(decodeUnicodeEscape(x[0][1:-1])))
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322
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323 # [161] NIL ::= '(' WS* ')'
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324 NIL = Literal('(') + ')'
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325 NIL.setParseAction(lambda x: rdflib.RDF.nil)
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326
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327 # [162] WS ::= #x20 | #x9 | #xD | #xA
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328 # Not needed?
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329 # WS = #x20 | #x9 | #xD | #xA
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330 # [163] ANON ::= '[' WS* ']'
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331 ANON = Literal('[') + ']'
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332 ANON.setParseAction(lambda x: rdflib.BNode())
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333
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334 # A = CaseSensitiveKeyword('a')
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335 A = Literal('a')
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336 A.setParseAction(lambda x: rdflib.RDF.type)
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337
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338
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339 # ------ NON-TERMINALS --------------
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340
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341 # [5] BaseDecl ::= 'BASE' IRIREF
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342 BaseDecl = Comp('Base', Keyword('BASE') + Param('iri', IRIREF))
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343
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344 # [6] PrefixDecl ::= 'PREFIX' PNAME_NS IRIREF
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345 PrefixDecl = Comp(
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346 'PrefixDecl', Keyword('PREFIX') + PNAME_NS + Param('iri', IRIREF))
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347
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348 # [4] Prologue ::= ( BaseDecl | PrefixDecl )*
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349 Prologue = Group(ZeroOrMore(BaseDecl | PrefixDecl))
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350
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351 # [108] Var ::= VAR1 | VAR2
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352 Var = VAR1 | VAR2
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353 Var.setParseAction(lambda x: rdflib.term.Variable(x[0]))
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354
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355 # [137] PrefixedName ::= PNAME_LN | PNAME_NS
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356 PrefixedName = Comp('pname', PNAME_LN | PNAME_NS)
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357
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358 # [136] iri ::= IRIREF | PrefixedName
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359 iri = IRIREF | PrefixedName
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360
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361 # [135] String ::= STRING_LITERAL1 | STRING_LITERAL2 | STRING_LITERAL_LONG1 | STRING_LITERAL_LONG2
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362 String = STRING_LITERAL_LONG1 | STRING_LITERAL_LONG2 | STRING_LITERAL1 | STRING_LITERAL2
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363
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364 # [129] RDFLiteral ::= String ( LANGTAG | ( '^^' iri ) )?
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365
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366 RDFLiteral = Comp('literal', Param('string', String) + Optional(Param(
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367 'lang', LANGTAG.leaveWhitespace()) | Literal('^^').leaveWhitespace() + Param('datatype', iri).leaveWhitespace()))
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368
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369 # [132] NumericLiteralPositive ::= INTEGER_POSITIVE | DECIMAL_POSITIVE | DOUBLE_POSITIVE
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370 NumericLiteralPositive = DOUBLE_POSITIVE | DECIMAL_POSITIVE | INTEGER_POSITIVE
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371
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372 # [133] NumericLiteralNegative ::= INTEGER_NEGATIVE | DECIMAL_NEGATIVE | DOUBLE_NEGATIVE
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373 NumericLiteralNegative = DOUBLE_NEGATIVE | DECIMAL_NEGATIVE | INTEGER_NEGATIVE
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374
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375 # [131] NumericLiteralUnsigned ::= INTEGER | DECIMAL | DOUBLE
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376 NumericLiteralUnsigned = DOUBLE | DECIMAL | INTEGER
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377
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378 # [130] NumericLiteral ::= NumericLiteralUnsigned | NumericLiteralPositive | NumericLiteralNegative
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379 NumericLiteral = NumericLiteralUnsigned | NumericLiteralPositive | NumericLiteralNegative
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380
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381 # [134] BooleanLiteral ::= 'true' | 'false'
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382 BooleanLiteral = Keyword('true').setParseAction(lambda: rdflib.Literal(True)) |\
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383 Keyword('false').setParseAction(lambda: rdflib.Literal(False))
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384
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385 # [138] BlankNode ::= BLANK_NODE_LABEL | ANON
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386 BlankNode = BLANK_NODE_LABEL | ANON
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387
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388 # [109] GraphTerm ::= iri | RDFLiteral | NumericLiteral | BooleanLiteral | BlankNode | NIL
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389 GraphTerm = iri | RDFLiteral | NumericLiteral | BooleanLiteral | BlankNode | NIL
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390
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391 # [106] VarOrTerm ::= Var | GraphTerm
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392 VarOrTerm = Var | GraphTerm
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393
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394 # [107] VarOrIri ::= Var | iri
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395 VarOrIri = Var | iri
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396
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397 # [46] GraphRef ::= 'GRAPH' iri
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398 GraphRef = Keyword('GRAPH') + Param('graphiri', iri)
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399
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400 # [47] GraphRefAll ::= GraphRef | 'DEFAULT' | 'NAMED' | 'ALL'
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401 GraphRefAll = GraphRef | Param('graphiri', Keyword('DEFAULT')) | Param(
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402 'graphiri', Keyword('NAMED')) | Param('graphiri', Keyword('ALL'))
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403
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404 # [45] GraphOrDefault ::= 'DEFAULT' | 'GRAPH'? iri
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405 GraphOrDefault = ParamList('graph', Keyword(
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406 'DEFAULT')) | Optional(Keyword('GRAPH')) + ParamList('graph', iri)
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407
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408 # [65] DataBlockValue ::= iri | RDFLiteral | NumericLiteral | BooleanLiteral | 'UNDEF'
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409 DataBlockValue = iri | RDFLiteral | NumericLiteral | BooleanLiteral | Keyword(
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410 'UNDEF')
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411
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412 # [78] Verb ::= VarOrIri | A
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413 Verb = VarOrIri | A
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414
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415
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416 # [85] VerbSimple ::= Var
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417 VerbSimple = Var
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418
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419 # [97] Integer ::= INTEGER
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420 Integer = INTEGER
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421
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422
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423 TriplesNode = Forward()
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424 TriplesNodePath = Forward()
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425
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426 # [104] GraphNode ::= VarOrTerm | TriplesNode
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427 GraphNode = VarOrTerm | TriplesNode
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428
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429 # [105] GraphNodePath ::= VarOrTerm | TriplesNodePath
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430 GraphNodePath = VarOrTerm | TriplesNodePath
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431
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432
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433 # [93] PathMod ::= '?' | '*' | '+'
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434 PathMod = Literal('?') | '*' | '+'
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435
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436 # [96] PathOneInPropertySet ::= iri | A | '^' ( iri | A )
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437 PathOneInPropertySet = iri | A | Comp('InversePath', '^' + (iri | A))
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438
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439 Path = Forward()
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440
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441 # [95] PathNegatedPropertySet ::= PathOneInPropertySet | '(' ( PathOneInPropertySet ( '|' PathOneInPropertySet )* )? ')'
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442 PathNegatedPropertySet = Comp('PathNegatedPropertySet', ParamList('part', PathOneInPropertySet) | '(' + Optional(
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443 ParamList('part', PathOneInPropertySet) + ZeroOrMore('|' + ParamList('part', PathOneInPropertySet))) + ')')
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444
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445 # [94] PathPrimary ::= iri | A | '!' PathNegatedPropertySet | '(' Path ')' | 'DISTINCT' '(' Path ')'
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446 PathPrimary = iri | A | Suppress('!') + PathNegatedPropertySet | Suppress('(') + Path + Suppress(
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447 ')') | Comp('DistinctPath', Keyword('DISTINCT') + '(' + Param('part', Path) + ')')
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448
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449 # [91] PathElt ::= PathPrimary Optional(PathMod)
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450 PathElt = Comp('PathElt', Param(
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451 'part', PathPrimary) + Optional(Param('mod', PathMod.leaveWhitespace())))
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452
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453 # [92] PathEltOrInverse ::= PathElt | '^' PathElt
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454 PathEltOrInverse = PathElt | Suppress(
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455 '^') + Comp('PathEltOrInverse', Param('part', PathElt))
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456
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457 # [90] PathSequence ::= PathEltOrInverse ( '/' PathEltOrInverse )*
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458 PathSequence = Comp('PathSequence', ParamList('part', PathEltOrInverse) +
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459 ZeroOrMore('/' + ParamList('part', PathEltOrInverse)))
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460
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461
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462 # [89] PathAlternative ::= PathSequence ( '|' PathSequence )*
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463 PathAlternative = Comp('PathAlternative', ParamList('part', PathSequence) +
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464 ZeroOrMore('|' + ParamList('part', PathSequence)))
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465
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466 # [88] Path ::= PathAlternative
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467 Path << PathAlternative
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468
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469 # [84] VerbPath ::= Path
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470 VerbPath = Path
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471
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472 # [87] ObjectPath ::= GraphNodePath
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473 ObjectPath = GraphNodePath
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474
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475 # [86] ObjectListPath ::= ObjectPath ( ',' ObjectPath )*
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476 ObjectListPath = ObjectPath + ZeroOrMore(',' + ObjectPath)
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477
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478
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479 GroupGraphPattern = Forward()
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480
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481
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482 # [102] Collection ::= '(' OneOrMore(GraphNode) ')'
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483 Collection = Suppress('(') + OneOrMore(GraphNode) + Suppress(')')
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484 Collection.setParseAction(expandCollection)
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485
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486 # [103] CollectionPath ::= '(' OneOrMore(GraphNodePath) ')'
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487 CollectionPath = Suppress('(') + OneOrMore(GraphNodePath) + Suppress(')')
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488 CollectionPath.setParseAction(expandCollection)
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489
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490 # [80] Object ::= GraphNode
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491 Object = GraphNode
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492
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493 # [79] ObjectList ::= Object ( ',' Object )*
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494 ObjectList = Object + ZeroOrMore(',' + Object)
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495
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496 # [83] PropertyListPathNotEmpty ::= ( VerbPath | VerbSimple ) ObjectListPath ( ';' ( ( VerbPath | VerbSimple ) ObjectList )? )*
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497 PropertyListPathNotEmpty = (VerbPath | VerbSimple) + ObjectListPath + ZeroOrMore(
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498 ';' + Optional((VerbPath | VerbSimple) + ObjectList))
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499
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500 # [82] PropertyListPath ::= Optional(PropertyListPathNotEmpty)
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501 PropertyListPath = Optional(PropertyListPathNotEmpty)
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502
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503 # [77] PropertyListNotEmpty ::= Verb ObjectList ( ';' ( Verb ObjectList )? )*
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504 PropertyListNotEmpty = Verb + ObjectList + ZeroOrMore(';' + Optional(Verb +
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505 ObjectList))
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506
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507
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508 # [76] PropertyList ::= Optional(PropertyListNotEmpty)
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509 PropertyList = Optional(PropertyListNotEmpty)
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510
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511 # [99] BlankNodePropertyList ::= '[' PropertyListNotEmpty ']'
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512 BlankNodePropertyList = Group(
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513 Suppress('[') + PropertyListNotEmpty + Suppress(']'))
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514 BlankNodePropertyList.setParseAction(expandBNodeTriples)
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515
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516 # [101] BlankNodePropertyListPath ::= '[' PropertyListPathNotEmpty ']'
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517 BlankNodePropertyListPath = Group(
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518 Suppress('[') + PropertyListPathNotEmpty + Suppress(']'))
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519 BlankNodePropertyListPath.setParseAction(expandBNodeTriples)
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520
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521 # [98] TriplesNode ::= Collection | BlankNodePropertyList
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522 TriplesNode << (Collection | BlankNodePropertyList)
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523
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524 # [100] TriplesNodePath ::= CollectionPath | BlankNodePropertyListPath
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525 TriplesNodePath << (CollectionPath | BlankNodePropertyListPath)
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526
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527 # [75] TriplesSameSubject ::= VarOrTerm PropertyListNotEmpty | TriplesNode PropertyList
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528 TriplesSameSubject = VarOrTerm + PropertyListNotEmpty | TriplesNode + \
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529 PropertyList
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530 TriplesSameSubject.setParseAction(expandTriples)
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531
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532 # [52] TriplesTemplate ::= TriplesSameSubject ( '.' Optional(TriplesTemplate) )?
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533 TriplesTemplate = Forward()
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534 TriplesTemplate << (ParamList('triples', TriplesSameSubject) + Optional(
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535 Suppress('.') + Optional(TriplesTemplate)))
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536
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537 # [51] QuadsNotTriples ::= 'GRAPH' VarOrIri '{' Optional(TriplesTemplate) '}'
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538 QuadsNotTriples = Comp('QuadsNotTriples', Keyword('GRAPH') + Param(
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539 'term', VarOrIri) + '{' + Optional(TriplesTemplate) + '}')
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540
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541 # [50] Quads ::= Optional(TriplesTemplate) ( QuadsNotTriples '.'? Optional(TriplesTemplate) )*
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542 Quads = Comp('Quads', Optional(TriplesTemplate) + ZeroOrMore(ParamList(
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543 'quadsNotTriples', QuadsNotTriples) + Optional(Suppress('.')) + Optional(TriplesTemplate)))
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544
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545 # [48] QuadPattern ::= '{' Quads '}'
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546 QuadPattern = '{' + Param('quads', Quads) + '}'
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547
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548 # [49] QuadData ::= '{' Quads '}'
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549 QuadData = '{' + Param('quads', Quads) + '}'
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550
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551 # [81] TriplesSameSubjectPath ::= VarOrTerm PropertyListPathNotEmpty | TriplesNodePath PropertyListPath
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552 TriplesSameSubjectPath = VarOrTerm + \
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553 PropertyListPathNotEmpty | TriplesNodePath + PropertyListPath
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554 TriplesSameSubjectPath.setParseAction(expandTriples)
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555
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556 # [55] TriplesBlock ::= TriplesSameSubjectPath ( '.' Optional(TriplesBlock) )?
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557 TriplesBlock = Forward()
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558 TriplesBlock << (ParamList('triples', TriplesSameSubjectPath) + Optional(
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559 Suppress('.') + Optional(TriplesBlock)))
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560
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561
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562 # [66] MinusGraphPattern ::= 'MINUS' GroupGraphPattern
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563 MinusGraphPattern = Comp(
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564 'MinusGraphPattern', Keyword('MINUS') + Param('graph', GroupGraphPattern))
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565
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566 # [67] GroupOrUnionGraphPattern ::= GroupGraphPattern ( 'UNION' GroupGraphPattern )*
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567 GroupOrUnionGraphPattern = Comp('GroupOrUnionGraphPattern', ParamList(
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568 'graph', GroupGraphPattern) + ZeroOrMore(Keyword('UNION') + ParamList('graph', GroupGraphPattern)))
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569
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570
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571 Expression = Forward()
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572
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573 # [72] ExpressionList ::= NIL | '(' Expression ( ',' Expression )* ')'
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574 ExpressionList = NIL | Group(
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575 Suppress('(') + delimitedList(Expression) + Suppress(')'))
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576
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577 # [122] RegexExpression ::= 'REGEX' '(' Expression ',' Expression ( ',' Expression )? ')'
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578 RegexExpression = Comp('Builtin_REGEX', Keyword('REGEX') + '(' + Param('text', Expression) + ',' + Param(
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579 'pattern', Expression) + Optional(',' + Param('flags', Expression)) + ')')
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580 RegexExpression.setEvalFn(op.Builtin_REGEX)
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581
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582 # [123] SubstringExpression ::= 'SUBSTR' '(' Expression ',' Expression ( ',' Expression )? ')'
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583 SubstringExpression = Comp('Builtin_SUBSTR', Keyword('SUBSTR') + '(' + Param('arg', Expression) + ',' + Param(
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584 'start', Expression) + Optional(',' + Param('length', Expression)) + ')').setEvalFn(op.Builtin_SUBSTR)
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585
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586 # [124] StrReplaceExpression ::= 'REPLACE' '(' Expression ',' Expression ',' Expression ( ',' Expression )? ')'
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587 StrReplaceExpression = Comp('Builtin_REPLACE', Keyword('REPLACE') + '(' + Param('arg', Expression) + ',' + Param(
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588 'pattern', Expression) + ',' + Param('replacement', Expression) + Optional(',' + Param('flags', Expression)) + ')').setEvalFn(op.Builtin_REPLACE)
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589
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590 # [125] ExistsFunc ::= 'EXISTS' GroupGraphPattern
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591 ExistsFunc = Comp('Builtin_EXISTS', Keyword('EXISTS') + Param(
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592 'graph', GroupGraphPattern)).setEvalFn(op.Builtin_EXISTS)
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593
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594 # [126] NotExistsFunc ::= 'NOT' 'EXISTS' GroupGraphPattern
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595 NotExistsFunc = Comp('Builtin_NOTEXISTS', Keyword('NOT') + Keyword(
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596 'EXISTS') + Param('graph', GroupGraphPattern)).setEvalFn(op.Builtin_EXISTS)
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597
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598
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599 # [127] Aggregate ::= 'COUNT' '(' 'DISTINCT'? ( '*' | Expression ) ')'
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600 # | 'SUM' '(' Optional('DISTINCT') Expression ')'
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601 # | 'MIN' '(' Optional('DISTINCT') Expression ')'
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602 # | 'MAX' '(' Optional('DISTINCT') Expression ')'
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603 # | 'AVG' '(' Optional('DISTINCT') Expression ')'
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604 # | 'SAMPLE' '(' Optional('DISTINCT') Expression ')'
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605 # | 'GROUP_CONCAT' '(' Optional('DISTINCT') Expression ( ';' 'SEPARATOR' '=' String )? ')'
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606
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607 _Distinct = Optional(Keyword('DISTINCT'))
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608 _AggregateParams = '(' + Param(
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609 'distinct', _Distinct) + Param('vars', Expression) + ')'
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610
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611 Aggregate = Comp('Aggregate_Count', Keyword('COUNT') + '(' + Param('distinct', _Distinct) + Param('vars', '*' | Expression) + ')')\
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612 | Comp('Aggregate_Sum', Keyword('SUM') + _AggregateParams)\
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613 | Comp('Aggregate_Min', Keyword('MIN') + _AggregateParams)\
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614 | Comp('Aggregate_Max', Keyword('MAX') + _AggregateParams)\
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615 | Comp('Aggregate_Avg', Keyword('AVG') + _AggregateParams)\
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616 | Comp('Aggregate_Sample', Keyword('SAMPLE') + _AggregateParams)\
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617 | Comp('Aggregate_GroupConcat', Keyword('GROUP_CONCAT') + '(' + Param('distinct', _Distinct) + Param('vars', Expression) + Optional(';' + Keyword('SEPARATOR') + '=' + Param('separator', String)) + ')')
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618
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619 # [121] BuiltInCall ::= Aggregate
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620 # | 'STR' '(' + Expression + ')'
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621 # | 'LANG' '(' + Expression + ')'
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622 # | 'LANGMATCHES' '(' + Expression + ',' + Expression + ')'
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623 # | 'DATATYPE' '(' + Expression + ')'
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624 # | 'BOUND' '(' Var ')'
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625 # | 'IRI' '(' + Expression + ')'
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626 # | 'URI' '(' + Expression + ')'
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627 # | 'BNODE' ( '(' + Expression + ')' | NIL )
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628 # | 'RAND' NIL
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629 # | 'ABS' '(' + Expression + ')'
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630 # | 'CEIL' '(' + Expression + ')'
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631 # | 'FLOOR' '(' + Expression + ')'
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632 # | 'ROUND' '(' + Expression + ')'
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633 # | 'CONCAT' ExpressionList
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634 # | SubstringExpression
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635 # | 'STRLEN' '(' + Expression + ')'
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636 # | StrReplaceExpression
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637 # | 'UCASE' '(' + Expression + ')'
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638 # | 'LCASE' '(' + Expression + ')'
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639 # | 'ENCODE_FOR_URI' '(' + Expression + ')'
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640 # | 'CONTAINS' '(' + Expression + ',' + Expression + ')'
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641 # | 'STRSTARTS' '(' + Expression + ',' + Expression + ')'
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642 # | 'STRENDS' '(' + Expression + ',' + Expression + ')'
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643 # | 'STRBEFORE' '(' + Expression + ',' + Expression + ')'
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644 # | 'STRAFTER' '(' + Expression + ',' + Expression + ')'
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645 # | 'YEAR' '(' + Expression + ')'
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646 # | 'MONTH' '(' + Expression + ')'
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647 # | 'DAY' '(' + Expression + ')'
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648 # | 'HOURS' '(' + Expression + ')'
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649 # | 'MINUTES' '(' + Expression + ')'
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650 # | 'SECONDS' '(' + Expression + ')'
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651 # | 'TIMEZONE' '(' + Expression + ')'
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652 # | 'TZ' '(' + Expression + ')'
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653 # | 'NOW' NIL
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654 # | 'UUID' NIL
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655 # | 'STRUUID' NIL
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656 # | 'MD5' '(' + Expression + ')'
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657 # | 'SHA1' '(' + Expression + ')'
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658 # | 'SHA256' '(' + Expression + ')'
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659 # | 'SHA384' '(' + Expression + ')'
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660 # | 'SHA512' '(' + Expression + ')'
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661 # | 'COALESCE' ExpressionList
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662 # | 'IF' '(' Expression ',' Expression ',' Expression ')'
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663 # | 'STRLANG' '(' + Expression + ',' + Expression + ')'
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664 # | 'STRDT' '(' + Expression + ',' + Expression + ')'
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665 # | 'sameTerm' '(' + Expression + ',' + Expression + ')'
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666 # | 'isIRI' '(' + Expression + ')'
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667 # | 'isURI' '(' + Expression + ')'
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668 # | 'isBLANK' '(' + Expression + ')'
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669 # | 'isLITERAL' '(' + Expression + ')'
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670 # | 'isNUMERIC' '(' + Expression + ')'
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671 # | RegexExpression
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672 # | ExistsFunc
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673 # | NotExistsFunc
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674
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675 BuiltInCall = Aggregate \
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676 | Comp('Builtin_STR', Keyword('STR') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_STR) \
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677 | Comp('Builtin_LANG', Keyword('LANG') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_LANG) \
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678 | Comp('Builtin_LANGMATCHES', Keyword('LANGMATCHES') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_LANGMATCHES) \
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679 | Comp('Builtin_DATATYPE', Keyword('DATATYPE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_DATATYPE) \
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680 | Comp('Builtin_BOUND', Keyword('BOUND') + '(' + Param('arg', Var) + ')').setEvalFn(op.Builtin_BOUND) \
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681 | Comp('Builtin_IRI', Keyword('IRI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_IRI) \
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682 | Comp('Builtin_URI', Keyword('URI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_IRI) \
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683 | Comp('Builtin_BNODE', Keyword('BNODE') + ('(' + Param('arg', Expression) + ')' | NIL)).setEvalFn(op.Builtin_BNODE) \
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684 | Comp('Builtin_RAND', Keyword('RAND') + NIL).setEvalFn(op.Builtin_RAND) \
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685 | Comp('Builtin_ABS', Keyword('ABS') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_ABS) \
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686 | Comp('Builtin_CEIL', Keyword('CEIL') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_CEIL) \
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687 | Comp('Builtin_FLOOR', Keyword('FLOOR') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_FLOOR) \
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688 | Comp('Builtin_ROUND', Keyword('ROUND') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_ROUND) \
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689 | Comp('Builtin_CONCAT', Keyword('CONCAT') + Param('arg', ExpressionList)).setEvalFn(op.Builtin_CONCAT) \
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690 | SubstringExpression \
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691 | Comp('Builtin_STRLEN', Keyword('STRLEN') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_STRLEN) \
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692 | StrReplaceExpression \
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693 | Comp('Builtin_UCASE', Keyword('UCASE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_UCASE) \
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694 | Comp('Builtin_LCASE', Keyword('LCASE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_LCASE) \
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695 | Comp('Builtin_ENCODE_FOR_URI', Keyword('ENCODE_FOR_URI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_ENCODE_FOR_URI) \
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696 | Comp('Builtin_CONTAINS', Keyword('CONTAINS') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_CONTAINS) \
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697 | Comp('Builtin_STRSTARTS', Keyword('STRSTARTS') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRSTARTS) \
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698 | Comp('Builtin_STRENDS', Keyword('STRENDS') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRENDS) \
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699 | Comp('Builtin_STRBEFORE', Keyword('STRBEFORE') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRBEFORE) \
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700 | Comp('Builtin_STRAFTER', Keyword('STRAFTER') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRAFTER) \
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701 | Comp('Builtin_YEAR', Keyword('YEAR') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_YEAR) \
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702 | Comp('Builtin_MONTH', Keyword('MONTH') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_MONTH) \
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703 | Comp('Builtin_DAY', Keyword('DAY') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_DAY) \
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704 | Comp('Builtin_HOURS', Keyword('HOURS') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_HOURS) \
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705 | Comp('Builtin_MINUTES', Keyword('MINUTES') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_MINUTES) \
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706 | Comp('Builtin_SECONDS', Keyword('SECONDS') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SECONDS) \
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707 | Comp('Builtin_TIMEZONE', Keyword('TIMEZONE') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_TIMEZONE) \
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708 | Comp('Builtin_TZ', Keyword('TZ') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_TZ) \
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709 | Comp('Builtin_NOW', Keyword('NOW') + NIL).setEvalFn(op.Builtin_NOW) \
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710 | Comp('Builtin_UUID', Keyword('UUID') + NIL).setEvalFn(op.Builtin_UUID) \
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711 | Comp('Builtin_STRUUID', Keyword('STRUUID') + NIL).setEvalFn(op.Builtin_STRUUID) \
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712 | Comp('Builtin_MD5', Keyword('MD5') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_MD5) \
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713 | Comp('Builtin_SHA1', Keyword('SHA1') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA1) \
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714 | Comp('Builtin_SHA256', Keyword('SHA256') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA256) \
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715 | Comp('Builtin_SHA384', Keyword('SHA384') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA384) \
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716 | Comp('Builtin_SHA512', Keyword('SHA512') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_SHA512) \
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717 | Comp('Builtin_COALESCE', Keyword('COALESCE') + Param('arg', ExpressionList)).setEvalFn(op.Builtin_COALESCE) \
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718 | Comp('Builtin_IF', Keyword('IF') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ',' + Param('arg3', Expression) + ')').setEvalFn(op.Builtin_IF) \
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719 | Comp('Builtin_STRLANG', Keyword('STRLANG') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRLANG) \
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720 | Comp('Builtin_STRDT', Keyword('STRDT') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_STRDT) \
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721 | Comp('Builtin_sameTerm', Keyword('sameTerm') + '(' + Param('arg1', Expression) + ',' + Param('arg2', Expression) + ')').setEvalFn(op.Builtin_sameTerm) \
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722 | Comp('Builtin_isIRI', Keyword('isIRI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isIRI) \
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723 | Comp('Builtin_isURI', Keyword('isURI') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isIRI) \
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724 | Comp('Builtin_isBLANK', Keyword('isBLANK') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isBLANK) \
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725 | Comp('Builtin_isLITERAL', Keyword('isLITERAL') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isLITERAL) \
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726 | Comp('Builtin_isNUMERIC', Keyword('isNUMERIC') + '(' + Param('arg', Expression) + ')').setEvalFn(op.Builtin_isNUMERIC) \
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727 | RegexExpression \
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728 | ExistsFunc \
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729 | NotExistsFunc
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730
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731 # [71] ArgList ::= NIL | '(' 'DISTINCT'? Expression ( ',' Expression )* ')'
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732 ArgList = NIL | '(' + Param('distinct', _Distinct) + delimitedList(
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733 ParamList('expr', Expression)) + ')'
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734
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735 # [128] iriOrFunction ::= iri Optional(ArgList)
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736 iriOrFunction = (Comp(
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737 'Function', Param('iri', iri) + ArgList).setEvalFn(op.Function)) | iri
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738
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739 # [70] FunctionCall ::= iri ArgList
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740 FunctionCall = Comp(
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741 'Function', Param('iri', iri) + ArgList).setEvalFn(op.Function)
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742
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743
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744 # [120] BrackettedExpression ::= '(' Expression ')'
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745 BrackettedExpression = Suppress('(') + Expression + Suppress(')')
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746
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747 # [119] PrimaryExpression ::= BrackettedExpression | BuiltInCall | iriOrFunction | RDFLiteral | NumericLiteral | BooleanLiteral | Var
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748 PrimaryExpression = BrackettedExpression | BuiltInCall | iriOrFunction | RDFLiteral | NumericLiteral | BooleanLiteral | Var
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749
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750 # [118] UnaryExpression ::= '!' PrimaryExpression
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751 # | '+' PrimaryExpression
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752 # | '-' PrimaryExpression
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753 # | PrimaryExpression
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754 UnaryExpression = Comp('UnaryNot', '!' + Param('expr', PrimaryExpression)).setEvalFn(op.UnaryNot) \
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755 | Comp('UnaryPlus', '+' + Param('expr', PrimaryExpression)).setEvalFn(op.UnaryPlus) \
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756 | Comp('UnaryMinus', '-' + Param('expr', PrimaryExpression)).setEvalFn(op.UnaryMinus) \
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757 | PrimaryExpression
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758
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759 # [117] MultiplicativeExpression ::= UnaryExpression ( '*' UnaryExpression | '/' UnaryExpression )*
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760 MultiplicativeExpression = Comp('MultiplicativeExpression', Param('expr', UnaryExpression) + ZeroOrMore(ParamList('op', '*') + ParamList(
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761 'other', UnaryExpression) | ParamList('op', '/') + ParamList('other', UnaryExpression))).setEvalFn(op.MultiplicativeExpression)
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762
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763 # [116] AdditiveExpression ::= MultiplicativeExpression ( '+' MultiplicativeExpression | '-' MultiplicativeExpression | ( NumericLiteralPositive | NumericLiteralNegative ) ( ( '*' UnaryExpression ) | ( '/' UnaryExpression ) )* )*
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764
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765 ### NOTE: The second part of this production is there because:
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766 ### "In signed numbers, no white space is allowed between the sign and the number. The AdditiveExpression grammar rule allows for this by covering the two cases of an expression followed by a signed number. These produce an addition or subtraction of the unsigned number as appropriate."
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767
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768 # Here (I think) this is not nescessary since pyparsing doesn't separate
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769 # tokenizing and parsing
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770
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771
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772 AdditiveExpression = Comp('AdditiveExpression', Param('expr', MultiplicativeExpression) +
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773 ZeroOrMore(ParamList('op', '+') + ParamList('other', MultiplicativeExpression) |
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774 ParamList('op', '-') + ParamList('other', MultiplicativeExpression))).setEvalFn(op.AdditiveExpression)
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775
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776
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777 # [115] NumericExpression ::= AdditiveExpression
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778 NumericExpression = AdditiveExpression
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779
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780 # [114] RelationalExpression ::= NumericExpression ( '=' NumericExpression | '!=' NumericExpression | '<' NumericExpression | '>' NumericExpression | '<=' NumericExpression | '>=' NumericExpression | 'IN' ExpressionList | 'NOT' 'IN' ExpressionList )?
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781 RelationalExpression = Comp('RelationalExpression', Param('expr', NumericExpression) + Optional(
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782 Param('op', '=') + Param('other', NumericExpression) |
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783 Param('op', '!=') + Param('other', NumericExpression) |
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784 Param('op', '<') + Param('other', NumericExpression) |
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785 Param('op', '>') + Param('other', NumericExpression) |
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786 Param('op', '<=') + Param('other', NumericExpression) |
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787 Param('op', '>=') + Param('other', NumericExpression) |
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788 Param('op', Keyword('IN')) + Param('other', ExpressionList) |
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789 Param('op', Combine(Keyword('NOT') + Keyword('IN'), adjacent=False, joinString=" ")) + Param('other', ExpressionList))).setEvalFn(op.RelationalExpression)
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790
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791
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792 # [113] ValueLogical ::= RelationalExpression
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793 ValueLogical = RelationalExpression
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794
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795 # [112] ConditionalAndExpression ::= ValueLogical ( '&&' ValueLogical )*
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796 ConditionalAndExpression = Comp('ConditionalAndExpression', Param('expr', ValueLogical) + ZeroOrMore(
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797 '&&' + ParamList('other', ValueLogical))).setEvalFn(op.ConditionalAndExpression)
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798
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799 # [111] ConditionalOrExpression ::= ConditionalAndExpression ( '||' ConditionalAndExpression )*
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800 ConditionalOrExpression = Comp('ConditionalOrExpression', Param('expr', ConditionalAndExpression) + ZeroOrMore(
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801 '||' + ParamList('other', ConditionalAndExpression))).setEvalFn(op.ConditionalOrExpression)
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802
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803 # [110] Expression ::= ConditionalOrExpression
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804 Expression << ConditionalOrExpression
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805
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806
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807 # [69] Constraint ::= BrackettedExpression | BuiltInCall | FunctionCall
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808 Constraint = BrackettedExpression | BuiltInCall | FunctionCall
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809
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810 # [68] Filter ::= 'FILTER' Constraint
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811 Filter = Comp('Filter', Keyword('FILTER') + Param('expr', Constraint))
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diff changeset
812
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parents:
diff changeset
813
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814 # [16] SourceSelector ::= iri
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parents:
diff changeset
815 SourceSelector = iri
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parents:
diff changeset
816
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817 # [14] DefaultGraphClause ::= SourceSelector
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diff changeset
818 DefaultGraphClause = SourceSelector
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parents:
diff changeset
819
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diff changeset
820 # [15] NamedGraphClause ::= 'NAMED' SourceSelector
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diff changeset
821 NamedGraphClause = Keyword('NAMED') + Param('named', SourceSelector)
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diff changeset
822
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823 # [13] DatasetClause ::= 'FROM' ( DefaultGraphClause | NamedGraphClause )
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parents:
diff changeset
824 DatasetClause = Comp('DatasetClause', Keyword(
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parents:
diff changeset
825 'FROM') + (Param('default', DefaultGraphClause) | NamedGraphClause))
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diff changeset
826
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827 # [20] GroupCondition ::= BuiltInCall | FunctionCall | '(' Expression ( 'AS' Var )? ')' | Var
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828 GroupCondition = BuiltInCall | FunctionCall | Comp('GroupAs', '(' + Param(
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829 'expr', Expression) + Optional(Keyword('AS') + Param('var', Var)) + ')') | Var
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diff changeset
830
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diff changeset
831 # [19] GroupClause ::= 'GROUP' 'BY' GroupCondition+
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diff changeset
832 GroupClause = Comp('GroupClause', Keyword('GROUP') + Keyword(
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diff changeset
833 'BY') + OneOrMore(ParamList('condition', GroupCondition)))
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diff changeset
834
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diff changeset
835
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diff changeset
836 _Silent = Optional(Param('silent', Keyword('SILENT')))
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diff changeset
837
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838 # [31] Load ::= 'LOAD' 'SILENT'? iri ( 'INTO' GraphRef )?
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parents:
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839 Load = Comp('Load', Keyword('LOAD') + _Silent + Param('iri', iri) +
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diff changeset
840 Optional(Keyword('INTO') + GraphRef))
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diff changeset
841
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842 # [32] Clear ::= 'CLEAR' 'SILENT'? GraphRefAll
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843 Clear = Comp('Clear', Keyword('CLEAR') + _Silent + GraphRefAll)
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diff changeset
844
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diff changeset
845 # [33] Drop ::= 'DROP' _Silent GraphRefAll
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parents:
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846 Drop = Comp('Drop', Keyword('DROP') + _Silent + GraphRefAll)
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diff changeset
847
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diff changeset
848 # [34] Create ::= 'CREATE' _Silent GraphRef
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diff changeset
849 Create = Comp('Create', Keyword('CREATE') + _Silent + GraphRef)
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diff changeset
850
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diff changeset
851 # [35] Add ::= 'ADD' _Silent GraphOrDefault 'TO' GraphOrDefault
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parents:
diff changeset
852 Add = Comp('Add', Keyword(
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guerler
parents:
diff changeset
853 'ADD') + _Silent + GraphOrDefault + Keyword('TO') + GraphOrDefault)
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diff changeset
854
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diff changeset
855 # [36] Move ::= 'MOVE' _Silent GraphOrDefault 'TO' GraphOrDefault
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parents:
diff changeset
856 Move = Comp('Move', Keyword(
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parents:
diff changeset
857 'MOVE') + _Silent + GraphOrDefault + Keyword('TO') + GraphOrDefault)
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diff changeset
858
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859 # [37] Copy ::= 'COPY' _Silent GraphOrDefault 'TO' GraphOrDefault
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parents:
diff changeset
860 Copy = Comp('Copy', Keyword(
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parents:
diff changeset
861 'COPY') + _Silent + GraphOrDefault + Keyword('TO') + GraphOrDefault)
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diff changeset
862
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diff changeset
863 # [38] InsertData ::= 'INSERT DATA' QuadData
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864 InsertData = Comp('InsertData', Keyword('INSERT') + Keyword('DATA') + QuadData)
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diff changeset
865
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866 # [39] DeleteData ::= 'DELETE DATA' QuadData
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867 DeleteData = Comp('DeleteData', Keyword('DELETE') + Keyword('DATA') + QuadData)
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diff changeset
868
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869 # [40] DeleteWhere ::= 'DELETE WHERE' QuadPattern
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parents:
diff changeset
870 DeleteWhere = Comp(
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871 'DeleteWhere', Keyword('DELETE') + Keyword('WHERE') + QuadPattern)
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872
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873 # [42] DeleteClause ::= 'DELETE' QuadPattern
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874 DeleteClause = Comp('DeleteClause', Keyword('DELETE') + QuadPattern)
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diff changeset
875
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876 # [43] InsertClause ::= 'INSERT' QuadPattern
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diff changeset
877 InsertClause = Comp('InsertClause', Keyword('INSERT') + QuadPattern)
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diff changeset
878
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diff changeset
879 # [44] UsingClause ::= 'USING' ( iri | 'NAMED' iri )
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diff changeset
880 UsingClause = Comp('UsingClause', Keyword('USING') + (
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881 Param('default', iri) | Keyword('NAMED') + Param('named', iri)))
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diff changeset
882
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883 # [41] Modify ::= ( 'WITH' iri )? ( DeleteClause Optional(InsertClause) | InsertClause ) ZeroOrMore(UsingClause) 'WHERE' GroupGraphPattern
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diff changeset
884 Modify = Comp('Modify', Optional(Keyword('WITH') + Param('withClause', iri)) + (Param('delete', DeleteClause) + Optional(Param(
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diff changeset
885 'insert', InsertClause)) | Param('insert', InsertClause)) + ZeroOrMore(ParamList('using', UsingClause)) + Keyword('WHERE') + Param('where', GroupGraphPattern))
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diff changeset
886
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diff changeset
887
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diff changeset
888 # [30] Update1 ::= Load | Clear | Drop | Add | Move | Copy | Create | InsertData | DeleteData | DeleteWhere | Modify
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diff changeset
889 Update1 = Load | Clear | Drop | Add | Move | Copy | Create | InsertData | DeleteData | DeleteWhere | Modify
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diff changeset
890
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diff changeset
891
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diff changeset
892 # [63] InlineDataOneVar ::= Var '{' ZeroOrMore(DataBlockValue) '}'
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diff changeset
893 InlineDataOneVar = ParamList(
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diff changeset
894 'var', Var) + '{' + ZeroOrMore(ParamList('value', DataBlockValue)) + '}'
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diff changeset
895
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896 # [64] InlineDataFull ::= ( NIL | '(' ZeroOrMore(Var) ')' ) '{' ( '(' ZeroOrMore(DataBlockValue) ')' | NIL )* '}'
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diff changeset
897 InlineDataFull = (NIL | '(' + ZeroOrMore(ParamList('var', Var)) + ')') + '{' + ZeroOrMore(
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diff changeset
898 ParamList('value', Group(Suppress('(') + ZeroOrMore(DataBlockValue) + Suppress(')') | NIL))) + '}'
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diff changeset
899
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900 # [62] DataBlock ::= InlineDataOneVar | InlineDataFull
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diff changeset
901 DataBlock = InlineDataOneVar | InlineDataFull
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diff changeset
902
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diff changeset
903
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904 # [28] ValuesClause ::= ( 'VALUES' DataBlock )?
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diff changeset
905 ValuesClause = Optional(Param(
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diff changeset
906 'valuesClause', Comp('ValuesClause', Keyword('VALUES') + DataBlock)))
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diff changeset
907
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diff changeset
908
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909 # [74] ConstructTriples ::= TriplesSameSubject ( '.' Optional(ConstructTriples) )?
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diff changeset
910 ConstructTriples = Forward()
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diff changeset
911 ConstructTriples << (ParamList('template', TriplesSameSubject) + Optional(
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diff changeset
912 Suppress('.') + Optional(ConstructTriples)))
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diff changeset
913
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914 # [73] ConstructTemplate ::= '{' Optional(ConstructTriples) '}'
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diff changeset
915 ConstructTemplate = Suppress('{') + Optional(ConstructTriples) + Suppress('}')
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916
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parents:
diff changeset
917
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918 # [57] OptionalGraphPattern ::= 'OPTIONAL' GroupGraphPattern
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parents:
diff changeset
919 OptionalGraphPattern = Comp('OptionalGraphPattern', Keyword(
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920 'OPTIONAL') + Param('graph', GroupGraphPattern))
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diff changeset
921
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parents:
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922 # [58] GraphGraphPattern ::= 'GRAPH' VarOrIri GroupGraphPattern
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diff changeset
923 GraphGraphPattern = Comp('GraphGraphPattern', Keyword(
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diff changeset
924 'GRAPH') + Param('term', VarOrIri) + Param('graph', GroupGraphPattern))
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diff changeset
925
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parents:
diff changeset
926 # [59] ServiceGraphPattern ::= 'SERVICE' _Silent VarOrIri GroupGraphPattern
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diff changeset
927 ServiceGraphPattern = Comp('ServiceGraphPattern', Keyword(
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928 'SERVICE') + _Silent + Param('term', VarOrIri) + Param('graph', GroupGraphPattern))
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parents:
diff changeset
929
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parents:
diff changeset
930 # [60] Bind ::= 'BIND' '(' Expression 'AS' Var ')'
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diff changeset
931 Bind = Comp('Bind', Keyword('BIND') + '(' + Param(
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diff changeset
932 'expr', Expression) + Keyword('AS') + Param('var', Var) + ')')
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diff changeset
933
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diff changeset
934 # [61] InlineData ::= 'VALUES' DataBlock
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parents:
diff changeset
935 InlineData = Comp('InlineData', Keyword('VALUES') + DataBlock)
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diff changeset
936
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937 # [56] GraphPatternNotTriples ::= GroupOrUnionGraphPattern | OptionalGraphPattern | MinusGraphPattern | GraphGraphPattern | ServiceGraphPattern | Filter | Bind | InlineData
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parents:
diff changeset
938 GraphPatternNotTriples = GroupOrUnionGraphPattern | OptionalGraphPattern | MinusGraphPattern | GraphGraphPattern | ServiceGraphPattern | Filter | Bind | InlineData
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diff changeset
939
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940 # [54] GroupGraphPatternSub ::= Optional(TriplesBlock) ( GraphPatternNotTriples '.'? Optional(TriplesBlock) )*
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diff changeset
941 GroupGraphPatternSub = Comp('GroupGraphPatternSub', Optional(ParamList('part', Comp('TriplesBlock', TriplesBlock))) + ZeroOrMore(
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diff changeset
942 ParamList('part', GraphPatternNotTriples) + Optional('.') + Optional(ParamList('part', Comp('TriplesBlock', TriplesBlock)))))
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diff changeset
943
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944
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diff changeset
945 # ----------------
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946 # [22] HavingCondition ::= Constraint
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diff changeset
947 HavingCondition = Constraint
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diff changeset
948
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949 # [21] HavingClause ::= 'HAVING' HavingCondition+
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950 HavingClause = Comp('HavingClause', Keyword(
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951 'HAVING') + OneOrMore(ParamList('condition', HavingCondition)))
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diff changeset
952
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953 # [24] OrderCondition ::= ( ( 'ASC' | 'DESC' ) BrackettedExpression )
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diff changeset
954 # | ( Constraint | Var )
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diff changeset
955 OrderCondition = Comp('OrderCondition', Param('order', Keyword('ASC') | Keyword(
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956 'DESC')) + Param('expr', BrackettedExpression) | Param('expr', Constraint | Var))
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957
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958 # [23] OrderClause ::= 'ORDER' 'BY' OneOrMore(OrderCondition)
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959 OrderClause = Comp('OrderClause', Keyword('ORDER') + Keyword(
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960 'BY') + OneOrMore(ParamList('condition', OrderCondition)))
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diff changeset
961
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962 # [26] LimitClause ::= 'LIMIT' INTEGER
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963 LimitClause = Keyword('LIMIT') + Param('limit', INTEGER)
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diff changeset
964
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965 # [27] OffsetClause ::= 'OFFSET' INTEGER
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966 OffsetClause = Keyword('OFFSET') + Param('offset', INTEGER)
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diff changeset
967
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968 # [25] LimitOffsetClauses ::= LimitClause Optional(OffsetClause) | OffsetClause Optional(LimitClause)
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969 LimitOffsetClauses = Comp('LimitOffsetClauses', LimitClause + Optional(
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970 OffsetClause) | OffsetClause + Optional(LimitClause))
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971
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972 # [18] SolutionModifier ::= GroupClause? HavingClause? OrderClause? LimitOffsetClauses?
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diff changeset
973 SolutionModifier = Optional(Param('groupby', GroupClause)) + Optional(Param('having', HavingClause)) + Optional(
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974 Param('orderby', OrderClause)) + Optional(Param('limitoffset', LimitOffsetClauses))
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diff changeset
975
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diff changeset
976
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977 # [9] SelectClause ::= 'SELECT' ( 'DISTINCT' | 'REDUCED' )? ( ( Var | ( '(' Expression 'AS' Var ')' ) )+ | '*' )
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978 SelectClause = Keyword('SELECT') + Optional(Param('modifier', Keyword('DISTINCT') | Keyword('REDUCED'))) + (OneOrMore(ParamList('projection', Comp('vars',
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979 Param('var', Var) | (Literal('(') + Param('expr', Expression) + Keyword('AS') + Param('evar', Var) + ')')))) | '*')
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980
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981 # [17] WhereClause ::= 'WHERE'? GroupGraphPattern
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982 WhereClause = Optional(Keyword('WHERE')) + Param('where', GroupGraphPattern)
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983
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984 # [8] SubSelect ::= SelectClause WhereClause SolutionModifier ValuesClause
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985 SubSelect = Comp('SubSelect', SelectClause + WhereClause +
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986 SolutionModifier + ValuesClause)
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987
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988 # [53] GroupGraphPattern ::= '{' ( SubSelect | GroupGraphPatternSub ) '}'
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989 GroupGraphPattern << (
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990 Suppress('{') + (SubSelect | GroupGraphPatternSub) + Suppress('}'))
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991
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992 # [7] SelectQuery ::= SelectClause DatasetClause* WhereClause SolutionModifier
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993 SelectQuery = Comp('SelectQuery', SelectClause + ZeroOrMore(ParamList(
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994 'datasetClause', DatasetClause)) + WhereClause + SolutionModifier + ValuesClause)
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995
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996 # [10] ConstructQuery ::= 'CONSTRUCT' ( ConstructTemplate DatasetClause* WhereClause SolutionModifier | DatasetClause* 'WHERE' '{' TriplesTemplate? '}' SolutionModifier )
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997 # NOTE: The CONSTRUCT WHERE alternative has unnescessarily many Comp/Param pairs
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998 # to allow it to through the same algebra translation process
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999 ConstructQuery = Comp('ConstructQuery', Keyword('CONSTRUCT') + (ConstructTemplate + ZeroOrMore(ParamList('datasetClause', DatasetClause)) + WhereClause + SolutionModifier + ValuesClause | ZeroOrMore(ParamList(
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1000 'datasetClause', DatasetClause)) + Keyword('WHERE') + '{' + Optional(Param('where', Comp('FakeGroupGraphPatten', ParamList('part', Comp('TriplesBlock', TriplesTemplate))))) + '}' + SolutionModifier + ValuesClause))
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1001
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1002 # [12] AskQuery ::= 'ASK' DatasetClause* WhereClause SolutionModifier
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1003 AskQuery = Comp('AskQuery', Keyword('ASK') + Param('datasetClause', ZeroOrMore(
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1004 DatasetClause)) + WhereClause + SolutionModifier + ValuesClause)
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1005
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1006 # [11] DescribeQuery ::= 'DESCRIBE' ( VarOrIri+ | '*' ) DatasetClause* WhereClause? SolutionModifier
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1007 DescribeQuery = Comp('DescribeQuery', Keyword('DESCRIBE') + (OneOrMore(ParamList('var', VarOrIri)) | '*') + Param(
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1008 'datasetClause', ZeroOrMore(DatasetClause)) + Optional(WhereClause) + SolutionModifier + ValuesClause)
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1009
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1010 # [29] Update ::= Prologue ( Update1 ( ';' Update )? )?
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1011 Update = Forward()
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1012 Update << (ParamList('prologue', Prologue) + Optional(ParamList('request',
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1013 Update1) + Optional(';' + Update)))
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1014
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1015
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1016 # [2] Query ::= Prologue
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1017 # ( SelectQuery | ConstructQuery | DescribeQuery | AskQuery )
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1018 # ValuesClause
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1019 # NOTE: ValuesClause was moved to invidual queries
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1020 Query = Prologue + (SelectQuery | ConstructQuery | DescribeQuery | AskQuery)
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1021
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1022 # [3] UpdateUnit ::= Update
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1023 UpdateUnit = Comp('Update', Update)
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1024
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1025 # [1] QueryUnit ::= Query
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1026 QueryUnit = Query
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1027
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1028 QueryUnit.ignore('#' + restOfLine)
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1029 UpdateUnit.ignore('#' + restOfLine)
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1030
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1031
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1032 expandUnicodeEscapes_re = re.compile(
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1033 r'\\u([0-9a-f]{4}(?:[0-9a-f]{4})?)', flags=re.I)
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1034
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1035
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1036 def expandUnicodeEscapes(q):
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1037 """
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1038 The syntax of the SPARQL Query Language is expressed over code points in Unicode [UNICODE]. The encoding is always UTF-8 [RFC3629].
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1039 Unicode code points may also be expressed using an \ uXXXX (U+0 to U+FFFF) or \ UXXXXXXXX syntax (for U+10000 onwards) where X is a hexadecimal digit [0-9A-F]
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1040 """
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1041
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1042 def expand(m):
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1043 try:
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1044 return chr(int(m.group(1), 16))
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1045 except:
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1046 raise Exception("Invalid unicode code point: " + m)
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1047
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1048 return expandUnicodeEscapes_re.sub(expand, q)
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1049
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1050
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1051 def parseQuery(q):
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1052 if hasattr(q, 'read'):
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1053 q = q.read()
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1054 if isinstance(q, bytestype):
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1055 q = q.decode('utf-8')
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1056
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1057 q = expandUnicodeEscapes(q)
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1058 return Query.parseString(q, parseAll=True)
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1059
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1060
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1061 def parseUpdate(q):
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1062 if hasattr(q, 'read'):
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1063 q = q.read()
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1064
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1065 if isinstance(q, bytestype):
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1066 q = q.decode('utf-8')
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1067
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1068 q = expandUnicodeEscapes(q)
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1069 return UpdateUnit.parseString(q, parseAll=True)[0]
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1070
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1071
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1072 if __name__ == '__main__':
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1073 import sys
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1074 DEBUG = True
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1075 try:
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1076 q = Query.parseString(sys.argv[1])
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1077 print("\nSyntax Tree:\n")
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1078 print(q)
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1079 except ParseException as err:
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1080 print(err.line)
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1081 print(" " * (err.column - 1) + "^")
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1082 print(err)