Attribute refers / @refersTo

Specification

Item	Value
Namespace	No namespace
Type	list of referenceRef
Properties	Content simple
Used by	Attribute Groups refers

Source

<xsd:attribute name="refersTo"> <xsd:simpleType> <xsd:list> <xsd:simpleType>
<xsd:restriction base="referenceRef"/> </xsd:simpleType>
</xsd:list>
</xsd:simpleType> </xsd:attribute>