ORA-31089

Error: ORA-31089: schema "string" does not target namespace "string"

Causa: The schema document contains references (through include and import definitions) to other schemas that do not belong to valid namespaces.

Acción: Make sure that all schemas referenced through include definitions target the same namespace as the parent schema. Further more, make sure that the namespace specified in the import definition matches the actual target namespace of the specified schema.