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Key Types

The Key Type identifies what sort of test the index supports. You can use one of three key types:

Key Type Description
Equality The performances of tests that look for nodes with a specific value.
Presence Improves the performance of tests that look for the existence of an node, regardless of its value.
Substring Improves the performance of tests that look for a node whose value contains a given substring. This key type is best used when your queries use the XQuery contains() substring function.

See Also

  • Index Types
  • Using Indices
  • Improve this Doc
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