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Beyond ISOcat

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  1. Beyond ISOcat CLARIN-NL 2012 ISOcat tutorial

  2. Vision MPI RR Typological Database System RR Relation registries MPI DCR ISO DCR Data category registries resource TDS database MPI archive Linguistic resources CLARIN-NL 2012 ISOcat tutorial

  3. How to make semantics explicit? • Associate data categories with your resources • using the PIDs • Where to put the PIDs? • Preferably in a schema • Or in the resource itself (redundant) • Or in the metadata of the resource (less specific) CLARIN-NL 2012 ISOcat tutorial

  4. What is a schema? • “comes from the Greek word "σχήμα" (skhēma), which means shape, or more generally, plan.” (wikipedia) • A collection of building blocks and rules on how to combine them into a valid resource • XML document: • DTD, XML Schema, Relax NG, … • easy; see http://www.isocat.org/12620/ • RDF graph • annotation property • easy; see http://www.isocat.org/ns/dcr.rdf • Text document: • A grammar • Extended Backus–Naur Form (EBNF) • ... • how to embed Data Category PIDs? • … CLARIN-NL 2012 ISOcat tutorial

  5. XML resource <lmf:lexiconxml:lang=“jp” alphabet=“ipa”> <lmf:entry> <lmf:lemma> <lmf:writtenForm>nihongo</…> … </…> … </…> … </…> CLARIN-NL 2012 ISOcat tutorial

  6. XML resource <lmf:lexiconxml:lang=“jp” alphabet=“ipa”> <lmf:entry> <lmf:lemma> • <lmf:writtenForm • dcr:datcat=“http://www.isocat.org/datcat/…”> • nihongo • </…> … </…> … </…> … </…> CLARIN-NL 2012 ISOcat tutorial

  7. XML Relax NG schema <rng:attribute name=“alphabet” dcr:datcat=“http://www.isocat.org/datcat/…”> <rng:valuedcr:datcat=“http://www.isocat.org/datcat/…”> ipa </…> … </…> CLARIN-NL 2012 ISOcat tutorial

  8. CGN/DCOI grammar with DC references http://lux13.mpi.nl/schemacat/schema/CGN (early alpha version) (* @dcr:datcat 'N' http://www.isocat.org/datcat/DC-4909 *) ... tag = 'N', '(', NTYPE, ',', GETAL, ',', GRAAD, ',', GENUS, ',', NAAMVAL, ')‘ ... (* @dcr:datcat NTYPE http://www.isocat.org/datcat/DC-4908 *)(* @dcr:datcat 'soortnaam' http://www.isocat.org/datcat/DC-4910*)(* @dcr:datcat 'eigennaam' http://www.isocat.org/datcat/DC-4911*)NTYPE = 'soortnaam' | 'eigennaam' ; ... CLARIN-NL 2012 ISOcat tutorial

  9. Multiple DCRs? • Actually we don’t need multiple DCRs to have overlapping subsets • Overlaps are created due to • Data categories are typed, and might not have the type you need • POS field (closed DC) of the lexical entry “walk” gets the value ‘verb’ (simple DC) • PoS = ‘verb’ • Verb (open DC) feature of a feature structure gets the value “walk” • Verb = ‘walk’ • External sets are imported just as they are • NKJP, GOLD, STTS, … • Only some take the effort to also provide mappings • There might be very fine differences between your data category and an existing one, and the owner doesn’t want to adapt • Still we would like to know that these data categories are the same or almost the same! CLARIN-NL 2012 ISOcat tutorial

  10. Relation Registry - RELcat • http://lux13.mpi.nl/relcat/ • (alpha version) • Stores user specific sets of relations: CLARIN-NL 2012 ISOcat tutorial language ID isocat:DC-2482 relcat:sameAs dc:language relcat:sameAs language name isocat:DC-2484 time coverage isocat:DC-1502 dc:coverage relcat:subClassOf

  11. Relation types • There already exist large collections of relations with their own vocabularies, e.g., OWL (2), SKOS, ... • RELcat has a basic relation type hierarchy • rel:related • rel:sameAs • rel:almostSameAs • rel:broaderThan • rel:superClassOf • rel:hasPart • rel:narrowerThan • rel:subClassOf • rel:partOf • which can be extended for other vocabularies • rel:sameAs • owl:sameAs • skos:exactMatch • rel:almostSameAs • skos:closeMatch CLARIN-NL 2012 ISOcat tutorial

  12. RELcat usage • RELcat is still in an alpha phase • no user interface yet • upload of relations via the system administrator • isocat@mpi.nl • however, there is an read-only API which is in use by (experimental) parts of the CLARIN infrastructure, e.g., the CMDI semantic mapping component CLARIN-NL 2012 ISOcat tutorial

  13. Another new kitten: SCHEMAcat • Resource schemata of any type should be stored somewhere persistently • Get a PID • These schemata are preferably annotated with data categories • SCHEMAcatISOcat • These data categories will then have (typed) relationships among each other • SCHEMAcatRELcat • Status: very early alpha, but some schemata are already available • CGN: http://lux13.mpi.nl/schemacat/schema/CGN CLARIN-NL 2012 ISOcat tutorial

  14. A whole litter! Linguistic resource (schema) Linguistic knowledge base Data categories Containers Concepts Relation Schema Registry - SCHEMAcat Data Category Registry - ISOcat Concept Registry Relation Registry - RELcat CLARIN-NL 2012 ISOcat tutorial

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