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Utility functions

xxf:is-blank()

[SINCE Orbeon Forms 2016.1]
xxf:is-blank() as xs:boolean
xxf:is-blank($value as xs:string?) as xs:boolean
If no argument is passed, use the context item converted to a string.
If an empty sequence is passed, return true().
Return true() if the argument or context item string is a blank string. Otherwise return false().
With one argument, this function returns the same as not(xxf:non-blank(arg)).
A string is considered blank if all leading and trailing Unicode whitespace, non-breakable space, zero-width space, and ISO control characters are removed, and the result is the empty string.

xxf:non-blank()

[SINCE Orbeon Forms 2016.1]
xxf:non-blank() as xs:boolean
xxf:non-blank($value as xs:string?) as xs:boolean
If no argument is passed, use the context item converted to a string.
If an empty sequence is passed, return false().
Return true() if the argument or context item string is not a blank string. Otherwise return false().
With one argument, this function returns the same as not(xxf:is-blank(arg)).
A string is considered blank if all leading and trailing Unicode whitespace, non-breakable space, zero-width space, and ISO control characters are removed, and the result is the empty string.

xxf:split()

[SINCE Orbeon Forms 4.3]
xxf:split() as xs:string*
xxf:split($value as xs:string) as xs:string*
xxf:split($value as xs:string, $separators as xs:string) as xs:string*
Split a string with one or more separator characters.
If no argument is passed, split the context item on white space.
If $separator is specified, each character passed is allowed as separator.
xxf:split(' foo bar baz ')
xxf:split('foo$bar_baz', '$_')
element/xxf:split()
element/@value/xxf:split()

xxf:trim()

[SINCE Orbeon Forms 2016.1]
xxf:trim() as xs:boolean
xxf:trim($value as xs:string?) as xs:string?
If no argument is passed, use the context item converted to a string.
If an empty sequence is passed, return the empty sequence.
The result is a string with all leading and trailing Unicode whitespace, non-breakable space, zero-width space, and ISO control characters are removed.