The split_string_into_string_list_by_regular_expression parses the string 'a,b,c,d,e' and outputs the list ['a','b','c','d','e'].
The choose service displays a dialog with 'Some title' but no message. The user is able to choose from the values ['a','b','c','d',e']. When the user presses OK the value the user chose is passed to the answer port of the choose service and so to the output of the workflow.
Some title
net.sourceforge.taverna.scuflworkers.ui.ChooseWorker
a,b,c,d,e
org.embl.ebi.escience.scuflworkers.java.SplitByRegex