I'm busily marking up secondary source tome (Round's Calendar  of French Charters, Henry II Household Accounts) and want to know if anyone has  

1. already done what I'm attempting 

2. developed a schema or DTD to which I can conform

Learning XML has a nice sample FO markup which handles footnotes and presentation as to paging, etc., which I can adapt.  However, as long as I'm doing the markup, it seems silly to not check and see if there is already a template with which I could be consistent.
 
Thanks in advance.
Ginny Wagner