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Semi-structured model

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In a Semi-Structured data model, there is no separation between the data and the schema, and the amount of structure used depends on the purpose.
A Semi-Structured data model is useful because:

  • Some data sources cannot be constrained by schema
  • It provides a flexible format for data exchange between different types of databases
  • It can be helpful to view structured data as semi-structured (for browsing purposes)
  • The schema can easily be changed
  • The data transfer format may be portable
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