Does RTC store the history of custom attributes?

Hi,

I'm trying to retrieve data from RTC/Rational Data Warehouse (v6.0.3) using SQL. For most things I've been able to use the Jazz Reporting Service Report Builder to generate the SQL I need.

My problem is that the report builder does not appear to allow custom attributes to be used to filter the results of historical trend reports, which is what I need to do.

My question is; Does RTC store the history of custom attributes?

And if so, does anyone have example SQL of filtering a historical trend report using a custom attribute?

Thanks in advance