Required. Association name of the list or site workflow to start (WF3.5 based 2010-style workflow). HINT: To see List association ...

Required. Association name of the list or site workflow to start (WF3.5 based 2010-style workflow).  HINT: To see List association names, first enter a value for ListId property.  This drop down will show a list of Site association names only if no ListId value is present. To reset ListId, click on the "..." button of ListId property to clear the value.