Where Can I Get Manual for Define-XML Excel Specs?

Hi, All:

I am trying to create ADaM Define-XML through P21 Community v3.1.2 (not Enterprise), and I have one question.

Extracted metadata from SAS XPT datasets, and I created Define-XML excel specs.

I think, after entering required info & uploading the specs to P21, I can generate Define-XML I want.

It's helpful for me, if there is manual about how to complete the excel specs (or "What info should I enter to each cell & Where should I enter?").

Could you please tell me where manual or reference doc is.

Thank you in advance.