--- a/SMART/galaxy/getWigData.xml	Fri Apr 19 10:13:11 2013 -0400
+++ b/SMART/galaxy/getWigData.xml	Mon Apr 22 11:08:07 2013 -0400
@@ -5,13 +5,21 @@
 	</command>
 	
     <inputs>
-    	<param name="inputGff3File" type="data" label="Input Gff3 File (compulsory option)" format="gff3"/>
-   		<param name="inputWigFile" type="data" label="Input Wig File (compulsory option)" format="wig"/>
-		<param name="tagName" type="text" value="None" label="tag option (compulsory option)" help="choose a tag name to write the wig information to output file."/>
+    	<param name="inputGff3File" type="data" label="Input Gff3 File" format="gff3"/>
+   		<param name="inputWigFile" type="data" label="Input Wig File" format="wig"/>
+		<param name="tagName" type="text" value="None" label="tag option" help="choose a tag name to write the wig information to output file."/>
 		<param name="strand" type="boolean" truevalue="-s" falsevalue="" checked="false" label="consider both strands separately."/>    
     </inputs>
         
     <outputs>
         <data format="gff3" name="outputFile" label="[getWigData -> gff3] Output File"/>       
     </outputs> 
+
+	<help>
+Reads a transcript list, computes the average value of some WIG data (please consult http://genome.ucsc.edu/goldenPath/help/wiggle.html to know more about this format) for each transcript and adds a tag corresponding to this average value to the transcript.
+
+The script finds all the data which correspond to the genomic coordinates of a transcript, average these data and store the result into a tag. Then, the transcripts are written in an output file, together with the tag.
+
+You can then plot your data using *plotTranscriptList.py*.
+	</help>
 </tool>