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What is metadata

What is metadata: Sometimes it is necessary to enrich data with more data that describes it:

A) “data about data”

B) Good metadata is:

  • Structured using some kind of schema
  • Standardised using some kind of model or tool

C) Represented as markup:

  • HTML
  • XML
  • RDF
  • OWL
  • .. ?

D) Lots of different types:

  • Structural (data organisation)
  • Guide (data searching, e.g. keywords)
  • Administrative (technical data information)

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