OWLQL

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OWL-QL

• Veli BIÇER

2
Agenda

• OWL-QL
• Basic Queries
• Paths
• Using OWL-QL with OWL-S ontology
• Filters

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OWL-QL

• a query language for OWL
• based on DQL (DAML Query Lang.)
• supports query-answering dialogues

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Basic Queries

• ltowl-qlquerygt lt/owl-qlquerygt
• Premise Pattern
• Query Pattern
• Answer Pattern
• Variable Pattern
• Knowledge Base Pattern

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Basic Queries

• If C1 is a Seafood Course and W1 is a drink of
  C1, what color is W1?
• P (type C1 Seafood-Course) (drink C1 W1)
• Q (has-color W1 ?x)
• V must-bind ?x
• AP drink ?x Wine with Seafoood
• KB http//somewhere.com/wine.owl
• A drink White Wine with Seafoood
• (ltpropertygt,ltsubjectgt,ltobjectgt)

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Basic Queries

• ltrdfsClass rdfID"SEAFOOD-COURSE"gt
• ltowlsubClassOfgt
• ltowlRestrictiongt
• ltowlonProperty rdfresource"DRINK"/gt
• ltowltoClassgt
• ltowlRestrictiongt
• ltowlonProperty rdfresource"COLOR"/gt
• ltowlhasValue rdfresource"WHITE"/gt
• lt/owlRestrictiongt
• lt/owltoClassgt
• lt/owlRestrictiongt
• lt/owlsubClassOfgt
• lt/rdfsClassgt

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Basic Queries

• in RDQL
• Select ?x
• Where (W1,has-color,?x)
• (C1,drink,W1)
• (Seafood-Course,type,C1)

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Paths

• ltfuncOntAirAvailabilityServices
  rdfID"THYAirAvailProfile"gt
• ltprofileserviceCategorygt
• ltaddParamNAICS rdfID"NAICS-category"gt
•   ltprofilevaluegtAirline reservation
  serviceslt/profilevaluegt
• ltprofilecodegt561599lt/profilecodegt
• lt/addParamNAICSgt
•   lt/profileserviceCategorygt
• lt/funcOntAirAvailabilityServices
• (and (type !x AirAvailServices)
• (serviceCategory !x !y)
• (NAICS !y !z)(code !z ?t))

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Using OWL-QL with OWL-S ontology

• OWL-QL query should follow the path defined in
  OWL-S service profile

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Using OWL-QL with OWL-S ontology

• ltfuncOntAirAvailabilityServices
  rdfID"THYAirAvailProfile"gt
• ltprofileserviceParametergt
• ltfuncOntQOS rdfID"qos"gt
• ltprofileserviceParameterNamegt
• AirQos
• lt/profileserviceParameterNamegt
•   ltprofilesParameter
• rdfresource"http//.....owlQualityRatingAve
  rage" /gt
• lt/funcOntQOSgt
• lt/profileserviceParametergt
• (and (type !x AirAvailabilityServices)
• (type ?p QOS)
• (sParameter ?p QualityRatingAverage))

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Filters

• In RDQL
• Select ?resource
• Where (?resource,age,?age)
• AND ?age gt 24
• In OWL-QL there is not a mechanism to apply such
  a filter, but can be included by using KIF
  argument.
• e.g (age ?resource ?age)(gt ?age 24)

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Thanks for your attention

• Veli BIÇER