Occurrence.Optional (0) is an enumeration that specifies the occurrence of an element in a sequence. It is a member of the Occurrence.Type and indicates that the item is expected to appear zero or one time in the input. Provided for backward compatibility in binary functions. Preferably, use BinaryOccurrence.Optional.

Other related enumerations are:

Applies to

Here’s a list of functions that work with Occurrence.Optional:

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Last update: August 17, 2023 | Contribute » | Contributors: Rick de Groot
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