--- a/skesa.xml	Mon Oct 15 17:12:13 2018 -0400
+++ b/skesa.xml	Wed Oct 17 22:04:16 2018 -0400
@@ -1,4 +1,4 @@
-<tool id="skesa" name="skesa" version="0.23">
+<tool id="skesa" name="skesa" version="0.24">
     <requirements>
       <requirement type="package" version="2.3.0">skesa</requirement>
     </requirements>
@@ -103,25 +103,25 @@
           <option value="advanced">Advanced</option>
         </param>
         <when value="advanced">
-          <param name="cores" type="integer" label="Number of cores to use" value="1"/>
-          <param name="memory" type="integer" label="Memory available (GB, only for sorted counter)" value="16"/>
-          <param name="hash_count" type="boolean" label="hash counter"/>
-          <param name="estimated_kmers" type="integer" label="Estimated number of unique kmers for bloom filter" value="100"/>
-          <param name="skip" type="boolean" label="skip bloom filter, use estimate kmers as the hash"/>
-          <param name="kmer" type="integer" label="Minimal kmer length for assembly" value="21"/>
-          <param name="min_count" type="integer" label="Minimal count for kmers retained for comparing alternate choices" value=""/>
-          <param name="max_kmer_count" type="integer" label="Minimum acceptable average count for estimating the maximal kmer length in reads" value=""/>
-          <param name="vector_percent" type="float" label="Count for  vectors as a fraction of the read number (1=disabled)" value="1">
+          <param name="cores" optional="true" type="integer" label="Number of cores to use (Default=16)" value=""/>
+          <param name="memory" optional="true" type="integer" label="Memory available (Default=32GB)" value=""/>
+          <param name="hash_count" optional="true" type="boolean" label="hash counter"/>
+          <param name="estimated_kmers" optional="true" type="integer" label="Estimated number of unique kmers for bloom filter (Default=100)" value=""/>
+          <param name="skip" optional="true" type="boolean" label="skip bloom filter, use estimate kmers as the hash"/>
+          <param name="kmer" optional="true" type="integer" label="Minimal kmer length for assembly (Default=21)" value=""/>
+          <param name="min_count" optional="true" type="integer" label="Minimal count for kmers retained for comparing alternate choices" value=""/>
+          <param name="max_kmer_count" optional="true" type="integer" label="Minimum acceptable average count for estimating the maximal kmer length in reads" value=""/>
+          <param name="vector_percent" optional="true" type="float" label="Count for vectors as a fraction of the read number (0-1,1=disabled)"  value="">
             <validator type="in_range" message="Must be float(0,1)." min="0" max="1"/>
           </param>
-          <param name="insert_size" type="integer" label="Expected insert size for paired reads (if not provided, it will be estimated)" value=""/>
-          <param name="steps" type="integer" label="Number of assembly iterations from minimal to maximal kmer length in reads" value="11"/>
-          <param name="fraction" type="float" label="Maximum noise to signal ratio acceptable for extension" value="0.1">
+          <param name="insert_size" optional="true" type="integer" label="Expected insert size for paired reads" value=""/>
+          <param name="steps" optional="true" type="integer" label="Number of assembly iterations from minimal to maximal kmer length in reads (Default=11)" value=""/>
+          <param name="fraction" optional="true" type="float" label="Maximum noise to signal ratio acceptable for extension (Default=0.1)" value="">
             <validator type="in_range" message="Must be float(0,1)." min="0" max="1"/>
           </param>
-          <param name="max_snp_len" type="integer" label="Maximal snp length" value="150"/>
-          <param name="min_contig" type="integer" label="Minimal contig length reported in output" value="200"/>
-          <param name="allow_snps" type="boolean" label="Turn SNP discovery" value="false"/>
+          <param name="max_snp_len" optional="true" type="integer" label="Maximal snp length (Default=150)" value=""/>
+          <param name="min_contig" optional="true" type="integer" label="Minimal contig length reported in output (Default=200)" value=""/>
+          <param name="allow_snps" optional="true" type="boolean" label="Turn SNP discovery (Default=false)"/>
         </when>
         <when value="basic"/>
       </conditional>