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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 - - 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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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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