Linked Library Data @ DNB
- 1. 1 Alexander Haffner Linked Library Data @ DNB
- 2. 2 – establish an accessible knowledge representation in machine-readable form on the internet – enable querying – align external knowledge representations – enrich our data by external data – future goal – decrease redundancies – subsequent use of existing data by linking – reduce cataloguing efforts objectives
- 4. What we have done so far 4 – modeling of our authority data as linked data – corporate bodies – Gemeinsame Körperschaftsdatei (Corporate Body Authority File, GKD) – persons – Personennamendatei (Name Authority File, PND) – subject headings – Schlagwortnormdatei (Subject Headings Authority File, SWD)
- 5. What we have done so far in numbers 5 – authority records – differentiated persons (1.797.911) – corporate bodies (1.320.711) – subject headings (168.615) – internal links – persons -> persons – persons -> corporate bodies – persons -> subject headings (1.059.570) – corporate bodies -> corporate bodies – corporate bodies -> persons – corporate bodies -> subject headings – external links – Wikipedia (123.569) – DBpedia (40.136) – VIAF (1.786.975) – LCSH (37.547)
- 6. Resource Description and Access – user-focused content standard - changes perspectives of cataloguing – re-use of FRBR, FRAD, and in future FRSAD – RDA is intended to replace AACR2 - cover all types of media (non-digital and digital; textual, visual, auditory, tactile etc.) – first release of RDA in June 2010 - RDA is published as online toolkit – independent of technical metadata formats - available metadata formats MARC 21 and RDF - RDA has been developed explicitly to take advantage of the Semantic Web 6
- 7. Primarily focused ontologies 7 – DCMI/RDA Task Group uses Open Metadata Registry to define RDF-Schemes http://metadataregistry.org/rdabrowse.htm − two types of vocabularies: 1. RDA Element Sets – in RFDS e.g. “Title”, “Content type” 2. RDA (Value) Vocabularies – in SKOS e.g. “spoken word” (controlled term for content type) – FRBR Review Group FRBRer (provisorisch): http://metadataregistry.org/schema/show/id/5.html FRAD (provisorisch): - http://metadataregistry.org/schema/show/id/24.html
- 8. The RDA (Resource Description and Access) Vocabularies 8
- 9. person descriptions attributes for the person Address Of The Person Name Of The Person Affiliation • Preferred Name For The Person Biographical Information • Variant Name For The Person Cataloguers Note Note Country Associated With The Person Other Designation Associated With The Person Date Associated With The Person Place Of Birth • Date Of Birth Place Of Death • Date Of Death Place Of Residence • Period Of Activity Of The Person Profession or Occupation Field Of Activity Of The Person Source Consulted Fuller Form Of Name Status Of Identification Gender Title Of The Person Identifier For The Person Undifferentiated Name Indicator Language Of The Person
- 10. 10 person descriptions relationships for the person Related Corporate Body (Person) • Employee • Group member • Incumbent • Sponsor Related Family (Person) • Family member • Progenitor Related Person (Person) • Alternate identity • Real identity
- 11. 11 our description of a person Person gnd:preferredNameForThePerson gnd:variantNameForThePerson rdaGr2:titleOfThePerson gnd:academicTitleOfThePerson gnd:studyPathsOfThePerson rdaGr2:identifierForThePerson gnd:invalidIdentifierForThePerson rdaGr2:gender rdaGr2:dateOfBirth rdaGr2:dateOfDeath rdaGr2:placeOfBirth rdaGr2:placeOfDeath rdaGr2:placeOfResidence gnd:countryCodeForThePerson rdaGr2:languageOfThePerson rdaGr2:periodOfActivityOfThePerson rdaGr2:biographicalInformation rdaGr2:professionOrOccupation gnd:functionOfThePerson gnd:publicationOfThePerson foaf:homepage foaf:page rdaRelGr2:relatedPersonPerson relationship:spouseOf relationship:parentOf relationship:siblingOf relationship:childOf relationship:grandparentOf relationship:grandchildOf rdaRelGr2:relatedCorporateBodyPerson owl:sameAs
- 12. 12 definition of single name parts Person … gnd:preferredNameForThePerson gnd:variantNameForThePerson … NameOfPerson gnd:usedRules gnd:personalName gnd:forename gnd:surname gnd:prefix gnd:qualifier gnd:locQualifier 1 1..*
- 13. corporate body descriptions attributes for the corporate body Address of the Corporate Body Name of the Corporate Body Associated Institution • Preferred Name for the Corporate Body Cataloguer's Note • Variant Name for the Corporate Body Corporate History Note Date Associated with the Corporate Body Number of a Conference, Etc. • Date of Conference, Etc. Other Designation Associated with the Corporate Body • Date of Establishment Place Associated with the Corporate Body • Date of Termination • Location of Conference, Etc. Field of Activity of the Corporate Body • Location of Headquarters Identifier for the Corporate Body Source Consulted Language of the Corporate Body Status of Identification Undifferentiated Name Indicator
- 14. 14 corporate body descriptions relationships for the corporate body Related Corporate Body (Corporate Body) • Hierarchical subordinate • Hierarchical superior • Mergee • Predecessor • Product of a merger • Product of a split • Successor Related Family (Corporate Body) • Founded organization • Sponsored organization Related Person (Corporate Body) • Employer
- 15. 15 our corporate body description Corporate Body gnd:preferredNameForTheCorporateBody gnd:preferredNameAcronymForTheCorporateBody rdaGr2:nameOfTheCorporateBody gnd:variantNameForTheCorporateBody gnd:variantNameAcronymForTheCorporateBody rdaGr2:identifierForTheCorporateBody gnd:invalidIdentifierForTheCorporateBody rdaGr2:dateOfEstablishment rdaGr2:dateOfTermination gnd:countyCodeForTheCorporateBody rdaGr2:languageOfTheCorporateBody gnd:functionOfTheCorporateBody foaf:homepage rdaRelGr2:hierarchicalSubordinate rdaRelGr2:hierarchicalSuperior rdaRelGr2:predecessor rdaRelGr2:successor gnd:predecessorWithoutSuccessor gnd:successorWithoutPredecessor rdfs:seeAlso
- 16. Limitations of current LLD 16 • aggregation of information • MARC 21 example: - 370 ## $eBerlin $s1928 $t1933 - 370 ## $eDresden $s1933 $t1939 • RDF example:
- 17. Limitations of current LLD 17 • aggregation of information • MARC 21 example: - 370 ## $eBerlin $s1928 $t1933 - 370 ## $eDresden $s1933 $t1939 • RDF example – potential approach:
- 18. Limitations of current LLD 18 • meta-metadata • Currently no possiblity for meta-metadata: Corporate Body Person FamilyPerson PersonPerson Employee Family Member Alternate Identity
- 19. 19 • meta-metadata • RDA rules Limitations of current LLD
- 20. 20 • meta-metadata • potential approach Limitations of current LLD
- 21. Conclusion 21 – raising awareness in librarians for the next era in information distribution - minimizing cataloguing efforts in libraries – national libraries as forerunner - new system architectures which combine classical document stores (mostly MARC 21 based), relational databases and triple stores – non-librarian world web community benefits of our comprehensive reliable and dependable metadata – new business models for metadata providers and service providers
- 22. 22 Thank you! discussion is welcome… Linked Data Service of the German National Library http://www.d-nb.de/eng/hilfe/service/linked_data_service.htm