Filtering the Data View Web Part

A common scenario with the Data View Web Part is to display Related Items on a list item Display form. There are plenty good articles available describing the sets to set this up – for example:

http://blogs.msdn.com/sharepointdesigner/archive/2008/03/26/sharepoint-conference-building-a-sharepoint-designer-mashup-part-1.aspx

In addition to these steps, I’ve also found it necessary to make the adjustment described in these articles…

http://www.sharepointbloggers.com/2009/03/how-to-use-url-parameter-to-filter-data.html or http://support.microsoft.com/kb/831093.