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Indo WordNet A WordNet for Hindi

Indo WordNet A WordNet for Hindi. Centre for Technology Development for Indian Languages Computer Science and Engineering Department, IIT Bombay. Introduction. WordNet – A lexical database Searching the dictionary conceptually

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Indo WordNet A WordNet for Hindi

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  1. Indo WordNet A WordNet for Hindi Centre for Technology Development for Indian Languages Computer Science and Engineering Department, IIT Bombay

  2. Introduction • WordNet – A lexical database • Searching the dictionary conceptually • Different organizing principles for different syntactic categories • Synsets or the Synonymy Sets are the basic building blocks • Lexical knowledge base is the heart of any intelligent information processing system

  3. Semantic relations in WordNet • Synonymy • Hypernymy / Hyponymy • Antonymy • Meronymy / Holonymy • Gradation • Entailment • Troponymy

  4. Synonymy • Synonymy • True synonyms are rare • Synonymy related to a context • {Gar ‚ kmara} • {Gar ‚ Aavaasa} • {Gar ‚ janmakuMDlaIya sqaana} • {Gar ‚ svadoSa}

  5. How to create a synset • Word is chosen from a dictionary • The particular concept is made explicit • Other synonyms according to that concept are taken • Definition,example & ontology are given • Parts of speech are given

  6. Principles adopted in creating synsets • Minimaility the minimal set of words to make the concept unique • Coverage the maximal set of words- ordered by frequency in the corpus- to include all possible words standing for the sense • Replaceability the example sentence should be such that the most frequent words in the synset can replace one another in the sentence without altering the sense

  7. Example of a Synset in Wordnet • Example of a nominal concept Saor Saor, baaGa, vyaaGa`, naahr :iballaI kI jaait ka ek bahut baD,a AaOr BayaMkr, p``isaw ihMsak pSau“ iSakarI ko AcaUk inaSaanao nao Saor kao Gaayala kr idyaa ” Saor, Saorao-SaayarI : ga,ja,la ko dao carNa“ ]sanao Saor saunaakr sabakI vaahvaahI laUTI ” Saor, vaIrpuÉYa,, bahadur, narvaIr, narvyaaGa``, SaUr, SaUrvaIr, saUrmaa, vaIr: vah vaIrpuÉYa,jaao balavaana hao yaa saahsapUNa- yaa vaIrtapUNa- kaya- krta hao“ iSavaajaI kao maharaYT/ ka Saor kha jaata hO ”

  8. Semantic Relations • Hypernymy and Hyponymy • Relation between word meaning (synsets) • X is a hyponym of Y if X is a kind of Y • Hyponymy is transitive and asymmetrical • Hypernymy is inverse of Hyponymy lionanimalliving entityentity Saor  pSau  sajaIva  Aist%va

  9. Semantic Relations (Contd…) • Antonymy • Oppositeness in meaning • Relation between word forms • Meronymy and Holonymy • Part-whole relation, branch is a part of tree • X is a meronymy of Y if X is a part of Y • Meronym is transitive and asymmetrical • Holonymy is inverse relation of Meronymy

  10. Troponym and Entailment • Entailment • { Kra-Ta laonaa – saaonaa £ • Troponym • { laÐgaD,anaa ‚ kdmatala krnaa – calanaa £ • ¡ fusafusaanaa – baaolanaa £

  11. Cross Parts of Speech Linkage • linkages between Nominal and Verbal concepts • Ability Link specifies the inherited features of a nominal concept • Capability Link specifies the acquired features of a nominal concept • Function Link specifies the function of a nominal concept

  12. Cross Parts of Speech Linkage (Contd…) Ability Link jaMtu calanaa tOrnaa maClaI Capability Link tOrnaa vyai@t taota baaolanaa Function Link vaahna calanaa isalaaš maSaIna isalanaa

  13. Cross Parts of Speech Linkage (Contd…) • linkage between nominal and adjective concept • Attribute Link denotes the properties of a noun Attribute stnapayaI jaMtu inayattapI Noun Adjective Attribute baaGa maaMsaaharI Noun Adjective

  14. Cross Parts of Speech Linkage (Contd…) • Derived from • specifies the root form from which a particular word is derived • this relation can go from noun to adjective or vice versa, noun to verb and adjective to verb • aims to handle derivational morphology Aaturta Derived from Aatur Noun Adjective Derived from AiBamaMi~t AiBamaM~Na Noun Adjective Derived from baat baityaanaa Noun Verb gamaa-naa gama- Derived from Adjective Verb

  15. WordNet Sub-Graph saMrcanaa Hyponymy Aavaasa , inavaasa Hypernymy Meronymy rsaao[-Gar Hyponymy Aa^Mgana Sayana kxa M e r o n y m y Gar , gaRh Gloss baramada manauYyaaoM ka Cayaa huAa vah sqaana jaao dIvaaraoM sao Gaor kr banaayaa jaata hO Hyponymy AQyayana kxa Aitiqa gaRh AaEama JaaopD,I

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