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Bucharest, 30 July 2003
Computational Lexicons and the Semantic WebTraining Session
Alessandro Lenci
Università di Pisa – Department of Linguistics
&
Istituto di Linguistica Computazionale - CNR
Bucharest, 30 July 2003
Case Studies
1. Formalize in RDF the EuroWordNet Synsets and Top Ontology
2. Writing semantic frames in RDF/S as basis for interlingua representations
Bucharest, 30 July 2003
EuroWordNetTop Ontology
Top Concepts (TC) classify synsets the subset of 1024 Basic Concepts synsets
TC are hierarchically ordered by means of a subsumption relation multiple inheritance between TC is not allowed
BC can be cross-classified in terms of multiple TC
“It is important to realize that the TC are more like semantic features than common conceptual classes”
Vossen (2001)
Bucharest, 30 July 2003
EuroWordNet
Bucharest, 30 July 2003
EuroWordNetTop Ontology
skinhairbody-covering
Top
1stOrderEntity 2ndOrderEntity
SituationType SituationComponent
Living
Location ExperiencePhysicalStatic DynamicNaturalCovering Part Group
Composition OriginFunction Form
Etc….Etc.
bodypartcellmuscleorgan
Object
Human
Mental
Directiondistancespatial propertyspatial relationcoursepath
change of positiondividelocomotionmotion
feeldesiredisturbanceemotionfeelinghumorpleasance
churchcompanyinstituteorganizationpartyunion
humanadultadult femaleadult malechildnativeoffspring
Bucharest, 30 July 2003
Task 1
1. Formalize in RDF/S the EWN TC
2. Creating RDF/S entries for the following synsets and link them to the relevant TC
{fruit} #0001TC: Comestible Function; ObjectForm; PartComposition; PlantLivingNaturalOrigin
{cell} #0002TC: PartComposition; LivingNaturalOrigin
{car} #0003TC: ArtifactOrigin; ObjectForm; VehicleFunction
Bucharest, 30 July 2003
Lexical ObjectsTop Level
mlm:Entry
mlm:SynUmlm:SemU
mlm:Synset
mlm:LexObjectrdfs:subClassOf
rdfs:subClassOf
rdfs:subClassOf
mlm:hasSynUmlm:correspondsToSynset
mlm:hasSemU
rdfs:literal
mlm:language
Bucharest, 30 July 2003
MLC in RDF/S features
mlm:LexObject mlm:Valuesmlm:feature
mlm:SemValues
mlm:SynValues
rdfs:subClassOfmlm:semFeature
rdfs:subClassOf
mlm:synFeature
rdfs:subPropertyOf
features are properties of lexical objects
Bucharest, 30 July 2003
Synsets in RDF/S
mlm:Synset rdfs:literalmlm:word
mlm:Synset
mlm:synsetRelation
mlm:Values
rdfs:literalmlm:gloss
mlm:feature
cf. also http://www.semanticweb.org/library/wordnet/wordnet-20000620.rdfs
Bucharest, 30 July 2003
EWN Top Ontology in RDF/S
TC as semantic features
mlm:SemValuesmlm:Synset
EwnTopOntology
rdfs:subClassOf
mlm:semFeature
topOntology
rdfs:subPropertyOf
http://…/EWNFunction
http://…/EWNVehicle
rdf:type
rdf:typeisa
Bucharest, 30 July 2003
Task 2
1. Formalize in RDF/S the following type of semantic frame
2. share semantic frames among entries in different languages
feature
semRole
n
feature
semRole
predicate
arg_
...
1arg_
Bucharest, 30 July 2003
Task 2semantic frames
PREDemploy#1
Arg#1<AGENT - HUMAN>
Arg#2<PATIENT - HUMAN>
SemU
employer
SemU
employee
SemU
employment
SemU
to employ
agentnominalization
patientnominalization
eventnominalization
master link
Bucharest, 30 July 2003
Semantic Frames in RDF/S
mlm:SemanticFramemlm:SemU
mlm:SemArgument
mlm:hasFrame
mlm:argument
rdfs:literal
mlm:semRole
mlm:SemValues
mlm:semType rdfs:literal
mlm:number
