2.2.4.80 spf:BoolExtType
The spf:BoolExtType type allows extended attributes on an xs:boolean type (as specified in [XMLSCHEMA1] and [XMLSCHEMA2]).
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<xs:complexType name="BoolExtType"> <xs:simpleContent> <xs:extension base="xs:boolean"> <xs:anyAttribute namespace="##other" processContents="lax"/> </xs:extension> </xs:simpleContent> </xs:complexType>