New step: wait for input

Ari's Balisage symposium talk highlights the need for a step that will wait
for user input. I wonder if

  <p:wait-for-update href="someURI"/>

would do the trick. The proposed semantics are that it waits until someURI has
changed. For file: URIs, this is obvious, but I think it could be made to work
for HTTP URIs as well, at least those where the server returns a last-modified
or etag header.

                                        Be seeing you,
                                          norm

-- 
Norman Walsh
Lead Engineer
MarkLogic Corporation
Phone: +1 512 761 6676
www.marklogic.com