Common Terminology (CT) is to achieve metadata interoperability among the selected Well-Designed Digital Libraries (WDDLs) for
International Open Public Digital Library (IOPDL) and different
metadata standards. As a bridge terminology of widely used
metadata standards such as
MARC,
MODS,
DC,
QDC, it allows communities to use their own standards while providing uniformity to searching. It minimizes loss of information and maximizes preserving accurate information at
the multiple metadata model levels: schema, schema definition language, record and repository.
February of 2017. The CT website,
ct.iopdl.org, is updated for
the upgraded CT version 1.1.
January of 2017.
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 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.
December of 2016.
EuropeanaEDMtoCTConversion is developed from September, 2016 to convert
Europeana Data Model (EDM) records of
Europeana into
the developed Common Terminology (CT).
Europeana offered ways to access their data at http://labs.europeana.eu/api. Thanks to their kind offer, the HarvestEDM program was developed, which harvests their metadata records via their OAI-PMH Service by sets. Thanks to GOD, in the beginning of December 2016, all sets of Europeana EDM records were harvested in rdf/xml form. The harvested EDM records were converted into the developed Common Terminology (CT) in rdf/xml form in the beginning of December 2016. The statistics of the conversion shows high performance of CT, although values and used terms of EDM are very diverse: converted rate as 99.99%; SKOS semantic exact match rate as 67.16%; narrow match rate as 22.98%; broad match rate as 9.8%; and non converted rate 0.00980%.
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