The global Attribute element is the head of a substitution group. Any element that is a member of the group may be substituted for the Attribute element anywhere the Attribute element may be used in an instance file.
The required name attribute is the name of the entity attribute. This name is a unique identifier of an attribute within the entity.
Source
<xs:element name="Attribute" type="AttributeBaseType" abstract="true"><xs:annotation><xs:documentation>The global Attribute element is the head of a substitution group. Any element that is a member of the group may be substituted for the Attribute element anywhere the Attribute element may be used in an instance file.</xs:documentation></xs:annotation></xs:element>