http://www.w3.org/2001/XMLSchema#NonNegativeInteger

used by 15:

• southampton-ac-uk-apps
• southampton-ac-uk-cls-extras
• southampton-ac-uk-disabledgo
• southampton-ac-uk-jacs
• southampton-ac-uk-jargon
• southampton-ac-uk-org
• southampton-ac-uk-phonebook
• southampton-ac-uk-photos
• southampton-ac-uk-places
• southampton-ac-uk-pressinfo
• southampton-ac-uk-profile
• southampton-ac-uk-room-features
• southampton-ac-uk-services
• southampton-ac-uk-stats
• southampton-ac-uk-vending-machines