Most workspace query procedures output a "contents list", which can be used as input to many Workspace Inspection and Workspace Control procedures. All procedures whose input is indicated as "contentslist" accept any of the following:
A single word (taken as a procedure name)
A list of words (taken as procedure names)
A list of two lists (taken as procedure names and variable names, respectively)
A list of three lists (taken as procedure names, variable names, and property list names, respectively)