Candidate Data Formats (geo)

Format: OGC GML Google KML geoRSS/Atom Research Geo ontologies GML-lite in RDF
"Standard"? Yes No 1/2 No Yes
Easy? No Yes Yes No Yes
Webmaster tools Some Yes Yes Some a goal
Mainstream Web-facing tools? Some Yes Yes Some Yes
Device Independent? Yes No 1/2 Yes a goal
Extensibility? Yes/Hard Yes/Basic Yes Yes Yes
Professional GIS, govt data, format longevity? Yes Risky No Some a goal