How to fix the Oracle error ORA-30938: No prefix defined for namespace ‘string’ (particle string)?

In this post, you’ll learn more about the Oracle ErrorORA-30938: No prefix defined for namespace ‘string’ (particle string) with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30938: No prefix defined for namespace ‘string’ (particle string)

Reason for the Error ORA-30938: No prefix defined for namespace ‘string’ (particle string)

An XML namespace mapping (xmlns:=) must be defined for each particle (element or attribute) stored in an schema-constrained XMLType document.

How to fix the Error ORA-30938: No prefix defined for namespace ‘string’ (particle string) ?

You can fix this error in Oracle by following the below steps

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.