Parametric .ipt files, description texts, and preview pictures are common for all members of one family. Sets of parameter values specify particular family members.
You can install a set of standard Content Center libraries with Autodesk Inventor. Standard libraries are read-only and cannot be edited directly. To edit library parts, first copy them to the read/write library.
Use the Content Center Editor to build user libraries and to modify or expand standard content delivered with the Autodesk Inventor installation.