Hello I try to use the from_dataset param. I have a tabular file with two columns : sequence and ids I would like to let users select some sequences, based on the ids. <param name="seq" type="select" size="120" optional="false" multiple="true" label="Choose your sequences"> <options from_dataset="target"> <column name="name" index="1"/> <column name="value" index="0"/> </options> </param> But I would like to be able to access not only the sequences data, but also the ids. In the <command> tag : name=$seq.name : it give me "seq", the name of my parameter value=$seq.value : it gives me "atcgatcga,tagctacgatcg,aatctactacta", that's fine. I would like to print the id of each sequence. Is it possible ? Thank you. Fred --- Frederic Sapet Bioinformatics Research Engineer BIOGEMMA - Upstream Genomics Group Centre de Recherche de Chappes CS 90126 63720 CHAPPES FRANCE Tel : +33 (0)4 73 67 88 54 Fax : +33 (0)4 73 67 88 99 E-mail : frederic.sapet@biogemma.com<mailto:frederic.sapet@biogemma.com>