my suggestion is to check all the data tables as you use them. As my office is the Engineer of record for projects done for clients we are responsible to the data. I personally have checked, added correct data based on vendor data and will continue to do so. trusting information from any source other than vendor leaves too much room for error. If I were to build spec or catalog data, I would not guarantee 100% accuracy, I would add the fact that although information has been placed there to the best ability but with the company using such being the Engineer of Record they should check all information used.