There are now two versions of the SymbolDefinition schema.

All symbol definitions from MapGuide Open Source prior to MapGuide Open Source 2.0 use schema version 1.0.0. Symbol definitions created or updated in MapGuide Open Source 2.0 use schema version 1.1.0.

SymbolDefinition-1.0.0.xsd - Details
SymbolDefinition-1.1.0.xsd - Details