add variant set list

root/documentation/overlap.conf

@@ -52,7 +52,7 @@
       </so_term>
       <variant_set>
         type=String
-        description= Short name of a set to restrict the variants found. 
+        description= Short name of a set to restrict the variants found. (<a target="_blank" href="http://www.ensembl.org/info/genome/variation/data_description.html\#variation_sets">See list of short set names</a>) 
         example=ClinVar
       </variant_set>
       <cell_type>
@@ -162,7 +162,8 @@
       </so_term>
       <variant_set>
         type=String
-        description=Short name of a set to restrict the variants found.
+        description=Short name of a set to restrict the variants found.  (<a target="_blank" href='http://www.ensembl.org/info/genome/variation/data_description.html\#variation_sets'>See list of short set names</a>)  
+
         example=ClinVar
       </variant_set>
       <misc_set>