Oracle : Ошибка ORA-30938

"No prefix defined for namespace '%s' (particle %s)"
*Cause: An XML namespace mapping (xmlns:=) must
be defined for each particle (element or attribute) stored in
an schema-constrained XMLType document.
*Action: Add an xmlns attribute definition (attribute name="xmlns:prefix"
and value="namespace URL") to the current XMLType document.
The safest place to add this attribute is in the root node of
the document to ensure that the mapping will be in scope.

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