If I specify multiple parameters for a DVWP, I seem to have to always provide a value in the query string or I get nothing. For example,
How would I specify "everything from waldo and not limited to books" presuming that I must provide the 'category' parameter in the URL (which seems to be true for this web part)? One would presume something like * should work but it doesn't.
There is a field for "default value" but the question still applies: how to specify any, or all, or don't care.