OpenURL
metadata, identifier or locator effectively forms a ‘citation’ for the resource
OpenURL provides mechanism for encoding citation for a resource as a URL
OpenURL = baseURL + description
baseURL provides location of a ‘resolver’
description is either a global identifier (e.g. a DOI or ISBN) or a description (a citation) or mixture
http://sfx.bath.ac.uk/sfxmenu?genre=book&isbn=1234-5678