The updated CT RDF Schema version 1.1
The Common Terminology (CT) version 1.1 is upgraded. The updated CT version 1.1 changes or omits few unnecessary qualifiers of version 1.1. These changes are based on analyses of CT usage used in conversions from EDM of Europeana, MAP of DPLA, National Library of Korea, Harvard and MIT metadata records. Also, it is to adapt and embrace metadata standards (e.g., MAP of DPLA , EDM of Europeana, National Library of Korea’s MODS, Harvard’s Library Cloud, and MIT library’s QDC) and forms (json, rdf, xlsx, cvs, and xml) of cooperating organizations. Especially, few terms to describe administrative information of MAP and EDM are added changing existing qualifiers’ terms.
Download (ct1-1.pdf, PDF, 409KB)
Old CT RDF Schema version 1.1
CT RDF Schema supports to implement Common Terminology in RDF. RDF Schema follows World Wide Web Consortium at http://www.w3.org/TR/rdf-schema/. It is developed and modified during June through November, 2014.
- ct1-1(old).rdf: https://ct.iopdl.org/1.1/ct1-1(old).rdf
CT RDF schema, with CT definitions and SKOS semantic relationships
The below ct1-1(old).rdf, CT RDF schema, well explains definitions of 12 common terms and 58 qualifiers and their relationships with SKOS semantic relationships: skos:broader, skos:narrower, and skos:related.
- In CT RDF schema (W3C, RDF Schema 1.1, 2014), 12 Common Terms of CT (contributor, date,description, format, identifier, language, publisher, relation, rights, subject, title, and typeGenre) are defined as properties, and type, name, role and source qualifiers as sub-properties.
- For example, CT:subject has type attributes such as type=”spatial” and type=”temporal” in XML schema, but in RDFs, they are defined as sub-property of subject property. They are also defined and connected as narrower relationships in SKOS concepts (W3C, SKOS Simple Knowledge Organization System Primer, 2009).
- An authority qualifier in XML is defined as a class in RDFs, “a group containing members that have attributes,…or semantics in common or a kind of category” (DCMI, 2013). Authority attributes are defined and connected as related relationships of SKOS concepts. And they are included in CTSubject of CTScheme as 15 authorities (classes) (e.g., lcsh, lcshac, mesh, csh, nal, rvm, lcc, etc.) are defined as members of CTSubject collection in SKOS (W3C, 2009).