There are quite a few different content ‘standards’ being bandied about lately, from ANZRS to the Revit Model Content Style Guide.
There is a partial list of these content standards at the page below:
Content|Studio Blog: BIM Show Live – Content from inception to reality
Direct link to the current Autodesk Revit Model Content Style Guide:
http://revit.autodesk.com/Library/RMCSG/Revit_Model_Content_Style_Guide_v2_1.zip
