Agropedia Knowledge Models Launch Workshop Prabhakar TV 12 Jan - - PowerPoint PPT Presentation

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Agropedia Knowledge Models Launch Workshop Prabhakar TV 12 Jan - - PowerPoint PPT Presentation

Agropedia Knowledge Models Launch Workshop Prabhakar TV 12 Jan 2009 Prabhakar TV 1 What is agropedia ? Agriculture Knowledge Repository of universal Meta models and localized content for a variety of users with appropriate interfaces


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Agropedia Knowledge Models

Launch Workshop Prabhakar TV 12 Jan 2009

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What is agropedia?

Agriculture Knowledge Repository of universal Meta models and localized content for a variety of users with appropriate interfaces Built in collaborative mode in Multiple languages This sounds like a slogan..

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What is agropedia

  • It is a Semantic Web Application
  • What is Semantic Web?
  • It is a web application that understands the

domain.

  • What do you mean understands the domain
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Pigeonpea domain model

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Pigeonpea Domain Model

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How is the domain model useful?

  • Search

– Syntactic search vs. semantic search – Google does syntactic search – Google searches for the occurrence of the sub- string – Google can not show me all the photographs of insect-pests of Pigeon Pea

  • Inference

– How do I manage this insect-pest?

  • Teaching and Training
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This domain model is what we are calling knowledge model OK Tell me more...

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Knowledge Models

  • A knowledge model is a function of its use
  • For the same domain one needs multiple models

depending on the – use(indexing, inference:expert systems.. ), – user(scientist, extension worker..)

  • All such models need to be consistent and

coherent

  • Research needed to identify these different models

and build them

  • They get used in tagging
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Knowledge Models

  • Controlled Vocabulary

– The concepts and the terms that are used in that domain

  • Taxonomy

– A hierarchic organisation – Broader Term, Narrower Term – Linneaus

  • Thesaurus

– Has more relationships than a taxonomy – like Related term - Agrovoc

  • Topic Maps

– Specially suited for content organisation

  • Ontology

– rich knowledge model; user defined relationships, ...

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How do we build a Knowledge model?

  • Many tools like Protégé, NeOn Toolkit, TM4L
  • We use a very simple tool call cmap tools
  • Helps us build concept maps
  • Concept maps are graphical representations of

the various terms and their relationships in a domain

  • Very easy to learn and use
  • Can be used to build Taxonomies, thesaurus,
  • ntology, topic maps....
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Concept Map

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Generic model (one for all crops) Specific models (One for each crop)

Knowledge Models

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What we did in the project so far

  • Built a generic crop knowledge model
  • Developed specific crop knowledge model for 9

crops

  • Built a content management system
  • Built an tagging system for this content based on the

crop knowledge models

  • Built a syntactic and semantic search using the

using the knowledge model

  • All this is hosted at http://www.agropedia.net
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this is a document about rice and its pests..... Once the rice ap- pear in the world ..... Mad Cow Disea- se is the commonly used name for Bovine Spongiform Encephalopathy (BSE) ....

docs, pdf, txt, ... jpg, gif, bmp, ... wav, audio, ... htm, html, .., ... author: ... subject: .... identifier: .... author: ... subject: .... identifier: .... author: ... subject: .... identifier: .... author: ... subject: .... identifier: ....

Meta Tags, derived from KMs

Content

Keyword search

User Interfaces

Knowledge Models

Users

agropedia Architecture

..

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What next?

  • Content, content, content
  • Applications, services
  • Community building, social networks
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Thank you