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To eliminate definition duplication, XML Schemas define:

  • A.an intersection table.
  • B.global elements.
  • C.a normalized definition table.
  • D.None of the above is correct.

Answer: B

Correct answer: global elements.

A global element is declared once at the top level of the schema and then referenced wherever it is needed, so a structure used in several places is defined only once. Local elements, declared inside another element, are visible only there. The distinction is the schema’s answer to duplication, and it is what makes large schemas maintainable.

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