Visual Schemas For E-Government Standards

Who knew that even whitehouse had xml standards! At
http://www.whitehouse.gov/omb/egov/e-5-documents.html
I found
“Exhibit 300 Schema, Version 3.02 (for FY08)
This document is used to describe and define the type of content including the entities, attributes, elements and notation used for the submission of Exhibit 300s for the FY08 budget cycle.”
The schema definition is published for every year’s budget [...]