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fn:substring

fn:substring(
   sourceString as xs:string?,
   startingLoc as xs:double,
   [length as xs:double]
) as xs:string?

Summary

Returns a substring starting from the $startingLoc and continuing for $length characters.

Parameters
sourceString The string from which to create a substring.
startingLoc The number of characters from the start of the $sourceString.
length The number of characters beyond the $startingLoc.

Example

fn:substring("123456", 2, 2)

=> "23"

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