I read ccppschema-20030226.xsd and the error.
I guess you have an illegal character in that schema,
and i think it is Double Quote (").
Read the error  message again:

** ERROR: Non-whitespace characters are not allowed  in schema
elements **

You don't receive error before BitsPerPixel entity,
i see them free of Double Quote in their comments.
and I guess the same error occurred for "CPU", "ColorCapable"
"InputCharSet" and other entities that their comment includes
Double Quote.