Section 5.8.5.7 defines the attribute 'mustLoc', and 5.8.5.8 defines
'noLoc'. Both are included in the list of attributes for the validation
module (5.8.5) and they're mentioned in the description of endsWith
(5.8.5.5).
Neither of these attributes is referenced in the content model for the
validation or rule elements, and they're not in the schema.
Regards,
Tom