I'd like to integrate with Galaxy and launch workflows, and I am hoping to reuse Galaxy's support for prompting the user for items that are tagged as being set at runtime. It looks to me that I could load the workflows/run page in a frame on my app (on the same server) and reuse it. The problem I'm having is that I don't understand how the parameters for the input files are encoded. For example, here is one for adding a column to a dataset: <select name="22|input" last_selected_value="53"> <option value="53" selected>1: Add column on data 6</option> </select> <input type="hidden" name="22|__force_update__input" value="true" /> </div> <div style="clear: both"></div> </div> What are 22 and 53? They don't seem to correspond to dataset IDs. Is there a way that I can encode data library IDs such that I can submit this form and have Galaxy run the workflow with the right files in a new history? Thanks! John Duddy Sr. Staff Software Engineer Illumina, Inc. 9885 Towne Centre Drive San Diego, CA 92121 Tel: 858-736-3584 E-mail: jduddy@illumina.com<mailto:jduddy@illumina.com>