An attribute domain vocabulary module declares one new attribute specialized from either the props or base attribute.
All vocabulary and constraint modules must document their domains attribute contribution. The OASIS grammar files use a dita:domainsModule element to document the contribution; this element is used consistently to make it easy to find values when creating a document type shell. An XML comment or xs:appinfo element can also be used.
An attribute domain consists of one file. The file must have a single attribute group definition that contains the definition of the attribute itself, where the attribute group is named attnameAtt-d-attribute.
<xs:attributeGroup name="deliveryTargetAtt-d-attribute"> <xs:attribute name="deliveryTarget" type="xs:string"> <!-- Documentation for attribute --> </xs:attribute> </xs:attributeGroup>