fn:concat function

The fn:concat function concatenates two or more strings into a single string.

Syntax

Read syntax diagramSkip visual syntax diagramfn:concat( string-value, string-value,,string-value)
string-value
An xs:string value or the empty sequence.

Returned value

If all string-value arguments are the empty sequence, the returned value is the empty sequence. Otherwise, the returned value is an xs:string value that is the concatenation of all string-value arguments that are not the empty sequence.

Example

The following function concatenates the strings 'ABC', 'ABD', the empty sequence, and 'ABE', 

fn:concat('ABC', 'ABD', (), 'ABE')

The returned value is 'ABCABDABE'.