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sdf required attribute

asked 2019-08-18 22:02:11 -0500

xuzhongxing gravatar image

In sdf schema element definition, there is a "required" attribute. It's value might be "1", "0", "". What is the meaning of "" in this context?

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answered 2019-08-19 12:53:33 -0500

chapulina gravatar image

As documented here, these are the possible values for required:

  • 1: Exactly one is required
  • +: At least one is required, may have more
  • *: Zero or more elements are accepted
  • 0: Optional, not required, If present, there should be only one.
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Asked: 2019-08-18 22:02:11 -0500

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Last updated: Aug 19