I'm trying to debug XSLT for CQWP. I followed this guide. So I'm able to retrieve the XML, and link the files temporarily together using xsl:import. But then Visual Studio can't find the schema for xmlns:cmswrt="http://schemas.microsoft.com/WebPart/v3/Publishing/runtime" and fails when I try to use templates as SafeImageUrl and DisplayTitle. The blog mention this, but I don't understand the workaround. And I have the same issue when I have to use ddwrt. Is there no way I can import the schema files? I had a look around but found nothing.