Master Detail Relationship for a Prompt

[dougp]

It is possible to put a value prompt on a report page and configure it to auto-submit.
It is possible to create a page set to force page breaks at changes in data values.  For lists, crosstabs, etc, this is done by setting the master detail relationships property.

I don't see a master detail relationships property for the value prompt.  If I put a value prompt on the report page, how do I ensure it is presenting data in the correct context?