Data Extraction From HTML Tables

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Data Extraction From HTML Tables

• Cui Tao
• Department of Computer Science
• Brigham Young University

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Information In Tables

• Nowadays, significant portion of the information
  on the Wed is stored in tables.

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The Ontology-Based Extraction
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The Ontology-Based Extraction
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Major Problems

• In the tables, the values and their corresponding
  attributes are separately. But the ontology can
  only extract the data when they are together.
• Sometimes the attributes in the table are the
  values in the database, the values in the table
  are only the identifier of the attributes.
• Sometimes, the values in one cell of the table
  may informs several attribute values in the
  database.

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Attribute-Value Pair

• Attribute (part of the) constant/key word rule

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How To Solve This Problem?

• Put the attribute-value pair together.
• Try both order.

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More General
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Attribute Value

• The attributes in the table are actually values
  in the database

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How To Solve This Problem?

• Put attribute in the file depends on the Boolean
  value

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Value Multiple Information
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More Problems