gdmxml: "This is the homepage for gdmxml, an XML implementation of the Genealogical Data Model. Specifically, it is a RELAX NG Schema to validate XML documents with genealogical information according to the Genealogical Data Model put together by the Lexicon Group from GENTECH. "

It has long been felt that the text file format of ged or GEDCOM files is outdated
and this is some of work is in hand to replace it

Genealogical Data Model


Google Search: related:www.familysearch.org/GEDCOM/GedXML60.pdf


BASICS
What is a GEDCOM file

Google Search: GedXML 6.0

a pdf from 2002 a "beta" version of the GEDCOM XML Specification, Release 6.0.
FamilySearch Internet Genealogy Service

Google Search: GENTECH 1.1


Google Search: GenXML 2.0