[rules-users] JBoss Rules IDE 3.1-M1 - Validating all *.xls files in source path?

Hi, I've started looking at the JBoss Rules 3.1-M1 Eclipse plugin to get an idea of how much migration work I have to look forward to. The first issue I ran into is that it appears the Drools Builder is validating every Excel (.xls) file I have in my source path. Is this a design decision and if so, how can I "hide" non-decision table .xls files from the Drools builder? I've tried excluding them from the Eclipse Source Path using a "source exclusion rule", but that didn't seem to work. Thanks, Bree