Illegal base element name.
#2158 Compile-time error
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.