I have a tool that takes a pair of files and manipulates them and produces a new pair of files. One output file corresponds to the first input file, the second output file corresponds to the second input file. I would like to label them as such. Right now I get two datasets in the history that look like this: tool_name on data X and data Y I have tried setting the label of each output like this: label="my tool name on ${input1.name}" and label="my tool name on ${input2.name}" but this isn't exactly what I want. What are all of the various attributes of an input parameter that I can reference in an output label? I'd like to also use the id of the dataset in my history (the X and Y in my example above), but I can't seem to figure out how to reference it. -- Glen L. Beane Software Engineer The Jackson Laboratory Phone (207) 288-6153