Hidden Metadata and Parameters

Hello, all:

I recently received a complex assembly that was created in Creo Parametric. The designer told me that somewhere in the metadata of the part was the part number so it could be ordered, but I can't find it in the Relations and Parameters window. Is there any location where metadata can be in a Creo file?

(For reference, I am an Autodesk Inventor user who is very unfamiliar with Creo.)

Thanks in advance,

Atlas