Diagrammar, a framework to provide accessible graphical content

Hello DPUB-ARIA folks,
 
On the PF call today, I was asked to provide information about the
Diagrammar.
here is the Diagrammar development as a whole.
http://diagramcenter.org/standards-and-practices/content-model.html
 
 
Here is an example of XML content directly:
http://diagramcenter.org/47-example-xml.html
 
Best
 
George