Hi Kristen,
If you are speaking of Trimbles menu driven attribute system, I highly doubt if LDD could properly deal with them, even if you could set it up. The feature library would need to be based on a description key library, which is pretty limited as far as using parameters ( sort of attributes). This would be collected using your single line feature coding ( ie . tree oak 7).
Trimbles software reads these attributes and sticks them in MS Access tables ( of course you would need the Trimble software). You could use Map to query in the attributes ( like a GIS).
I do not believe this can be done directly in LDD. All I can suggest is set up a Description key and figure prefix library, export it using the Trimble Link software, upload it and see what you got.
The other thing you could pursue is find someone who had the software ( Trimble), set up the library, and upload it for you ( a one time operation). I still don't know how LDD would deal with the stored attributes.
Good luck.