OCI-53008
The NAMESPACE tag value is not a registered schema.
Cause
The schema URL specified by the value of the NAMESPACE tag was not a registered Oracle XML DB schema.
Action
Specify a registered schema URL value. See the ALL_XML_SCHEMAS view for a list of registered schemas. See the Oracle XML DB Developers's Guide for information about registering schemas. See the Oracle Multimedia documentation for information about the mapping document schema (ordcmmp.xsd).