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9.15. DROP XML SCHEMA Statement
<xml schema removal> ::=
DROP XML SCHEMA <target URI>
This reverts the effect of CREATE XML SCHEMA .
The <target URI> should be a string constant that is equal to the value of "targetNamespace" attribute of "xs:schema" element of a previously declared XML schema.
The statement signals an error if the XMLSchema to be dropped is used in some WITH SCHEMA constraint.