This PDF from the NGA is an interesting read if you want to know how the US Government wants to keeps it's data formatted and served.  One thing you will notice that is absent from this document: Google Earth's KML. They want to use open standards and WMS, WFS and GML are in.

The NSG Functional Manager endorsed a set of key specifications known collectively as the Open Geospatial Consortium (OGC) Spatial Data Infrastructure (SDI) 1.0 baseline.

Here is a list of the Open Standards they are endorsing:

  • Web Features Service (WFS)
  • Web Map Service (WMS)
  • Web Map Context (WMC)
  • Web Coverage Service (WCS)
  • Geography Markup Language (GML)
  • Styled Layer Descriptor (SLD)
  • Catalog Services (CS-W)
  • Filter Encoding Specification (FE)
  • ISO 19115 Geographic Information - Metadata
  • ISO 19119 Geographic Information - Services
  • NSG Feature Data Dictionary and NSG Feature Catalog