Illegal base element name.

Additional Information

The element name 'X' is prefixed by the #BASE modifier, and therefore may not contain ':'.
The element name 'X' is prefixed by the #XMLNS modifier, and therefore may not contain ':'.
The element name 'X' may not contain a ':' because the markup-identification is declared as '#BASE'.

Explanation

When #BASE or #XMLNS modifier is specified for an element name, the name must not include the namespace.

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