Parsing inline schema (like used in WSDL) is this fundamentally possible

[martin]

Coming across inline schema (i.e an XML instance with the schema
incorporated a rootelement that is not defined in the schema)
Trying to figure out how this can be parsed apparently I run into any
information on how this is allowed within the specs of either XML and
Schema.

Or is this just a fundamental non-compliancy to W3C standards?