edot expertise and interests of IASI

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edot expertise and interests of IASI
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General goal of edot

• Integration of data from the web with existing
  data (about a given topic)
• Target topic risk assesment in food
• existing databases managed by BIA/INRA
• a hot topic
• a lot of useful public data distributed over the
  web

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Overview of the programme

• Specification of a data warehouse on risk
  assessment in food
• Data acquisition from the Web
• Structuring the warehouse
• Validation

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Data acquisition from the Web

• Related work (Djalil Mezaours Phd)
• Focused crawling guided by a declarative
  specification of the needs
• Design and evaluation of a form-based query
  language
• Each item of the form is a keywords query
  specifying an aspect of the searched documents
  (title, anchor, text neighborhood of input or
  output links)
• Experimented on three domains
• good precision can be reached but not enough
  answers to populate the warehouse
• Use of machine learning techniques to learn a
  crawling strategy to find more data

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Structuring the warehouse

• Design of a global schema
• pivot between existing databases and the
  specification of the searched web data
• existing databases fixed schemas
• specification of the searched data ??
• Keywords
• Hierarchies of keywords (ontology)
• URLs
• Classification and integration of new web data
• Problem bridging the structure gap