Browsing through the list-archives I get the impression that only
Richard Higgings from Durham University Library once tried to use EAD to
encode deeds and similar documents as deep as diplomatic tradition asks.
This was 10 years ago.
I'm currently working on the use of EAD for the monasterium.net charter
portal and would be interested if anybody else has made experiences in
the task of encoding medieval legal documents (deeds, charters,
instruments etc.) with EAD since then?