Hi All ,  i am working in  galaxy  tool . i want to add one visualization tools in galaxy . i don't understand how the display applications works . tag ox xml file is not clear for display application . can u just explain the meaning of type="template" tag , target_frame tag , & tag ,BASE URL , strip tag and viewable tag in this xml? <display id="genetrack_interval" version="1.0.0" name="view in"> <link id="genetrack" name="GeneTrack"> <url target_frame="galaxy_main">http://genetrack.g2.bx.psu.edu/galaxy?filename=${encoded_filename.qp}&hashkey=${hash_key.qp}&input=${qp(str($genetrack_file.id))}&GALAXY_URL=${galaxy_url.qp}</url> <param type="data" name="bed_file" viewable="False" format="bed6,genetrack"/> <!-- for now, we'll explicitly take care of the multi-step conversion; walk genetrack datatype down as a conversion of genetrack to genetrack doesn't exist and would likely be pointless --> <param type="data" dataset="bed_file" name="genetrack_file" format="genetrack" viewable="False" /> <param type="template" name="galaxy_url" strip="True" > ${BASE_URL}/tool_runner?tool_id=predict2genetrack </param> <param type="template" name="hash_key" strip="True" > #from galaxy.util.hash_util import hmac_new ${hmac_new( $APP.config.tool_secret, $genetrack_file.file_name )} </param> <param type="template" name="encoded_filename" strip="True" > #import binascii ${binascii.hexlify( $genetrack_file.file_name )} </param> </link> </display> Regards shashi shekhar