exsl:node-set
Originally defined as an EXSLT extension to XSLT 1.0, to convert a result-tree-fragment to a node-set.
node-set($arg as item()*) ➔ item()*
Arguments  | |||
  | $arg  | item()*  | The input to be 'converted'  | 
Result  | item()*  | ||
Namespace
http://exslt.org/common
Links to specifications
Saxon availability
Available in all Saxon editions. Available for all platforms.
Notes on the Saxon implementation
This function is retained in Saxon for backwards compatibility as it is widely used in
          XSLT 1.0 stylesheets, however it is simply a no-op, because the restrictions on use of
          node-sets that made it necessary have disappeared. The input can be any sequence, and it
          is returned unchanged. This differs from some implementations of the
            node-set() function which, for example, did the equivalent of
            parse-xml() if supplied with a string as input.