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{{Mark|Updated with Version 9.1:}} support for empty sequence.
Text replacement - "[http://www.w3.org/TR/xpath-functions-30" to "[https://www.w3.org/TR/xpath-functions-31"
The math [[Module Library|XQuery Module]] defines functions to perform mathematical operations, such as {{Code|pi}}, {{Code|asin}} and {{Code|acos}}. Most functions are specified in the [httphttps://www.w3.org/TR/xpath-functions-3031/ Functions and Operators Specification] of the upcoming XQuery 3.0 Recommendation, and some additional ones have been added in this module.
=Conventions=
==math:crc32==
{| width='100%'
|-
| width='120' | '''Signatures'''
|{{Func|math:crc32|$str string as xs:string?|xs:hexBinary?}}<br />
|-
| '''Summary'''
|Calculates the CRC32 check sum of the given string {{Code|$strstring}}.<br/>If {{Code|$arg}} is the an empty sequenceis supplied, the empty sequence is returned.
|-
| '''Examples'''
