You can store documents with additional information (e.g. dimension sheets) in catalog directories (including several of different types [PDF, HTML, etc.]). These are then displayed in the PARTdataManager or other end media.
It is important to have a clear name under Description so that the individual files can be clearly distinguished, especially in search results!
You can find detailed information on this under Section 5.8.2.1.16.6, “ Create document project ”.