--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/headtail.xml	Sat Mar 10 07:59:27 2012 -0500
@@ -0,0 +1,30 @@
+<tool id="headtail" name="head-or-tail">
+  <description>of a file</description>
+  <command>$headortail -n $nline $input > $out_file1 </command>
+  <inputs>
+    <param name="input" format="txt" type="data" label="Original file"/>
+    <param name="nline" size="10" type="integer" value="10" label="Number of lines to output"/>
+    <param name="headortail" type="select" label="Head or Tail">
+        <option value="head" selected="true">head</option>
+        <option value="tail">tail</option>
+    </param>
+  </inputs>
+  <outputs>
+    <data format="input" name="out_file1" />
+  </outputs>
+  <tests>
+    <test>
+      <output name="out_file1" file="testmap.head"/>
+      <param name="input" value="test.map" ftype="TXT"/>
+      <param name="n" value="10"/>
+      <param name="headortail"  value="head" />
+    </test>
+  </tests>
+  <help>
+
+**What it does**
+
+This is a wrapper of the unix head/tail command, which is used to show lines at the beginning or at the end of a file.  
+
+  </help>
+</tool>