# https://id.confref.org/data/confref-portal/event/ppdp1990 (confref labs, beta)
@prefix cr: <https://id.confref.org/ontology/> .
@prefix portal: <https://id.confref.org/data/confref-portal/vocab/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix wd: <http://www.wikidata.org/entity/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://id.confref.org/data/confref-portal/event/ppdp1990>
    a portal:Conference ;
    schema:location wd:Q25413 ;
    rdfs:label "International Workshop on Programming Language Implementation and Logic Programming" ;
    portal:acronym "PLILP" ;
    portal:area <https://id.confref.org/data/confref-portal/area/2> ;
    portal:city "Linköping" ;
    portal:country "Sweden" ;
    portal:endDate "1990-08-22"^^xsd:date ;
    portal:keyword "Abstract interpretation" ,
        "Delta Prolog" ,
        "E-Resolution" ,
        "Equationnal Methods" ,
        "Logic Program Transformations" ,
        "Logic programming" ,
        "Or-Parallelism" ,
        "Order-sorted Logic" ,
        "Stable Models" ,
        "binary programs" ,
        "circumscription" ,
        "distributed Prolog" ,
        "fair evaluation" ,
        "metaprograms" ,
        "modal logic" ,
        "negation" ,
        "predicate completion" ,
        "three-valued logic" ,
        "two-valued logic" ;
    portal:name "International Workshop on Programming Language Implementation and Logic Programming" ;
    portal:portalPage <http://portal.confref.org/list/ppdp1990> ;
    portal:series <https://id.confref.org/data/confref-portal/series/ppdp> ;
    portal:startDate "1990-08-20"^^xsd:date ;
    portal:submissionExtended "false"^^xsd:boolean ;
    portal:year "1990"^^xsd:integer ;
    cr:discipline wd:Q21198 ;
    cr:field <https://id.confref.org/data/oecd-fos/1.2> .