==Elvis Operator==
The Elvis operator is also available in other languages; it . It is sometimes called [https://en.wikipedia.org/wiki/Null_coalescing_operator null-coalescing operator]. The In XQuery, the value of the first operand will be returned if it is a non-empty sequence. Otherwise, the value of the second operand will be returned. It is equivalent to the {{Function|Utility|util:or}} function:
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