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#!/usr/bin/perl --
use strict;
...
  [443120, "Vegetables", 443026],
  [445720, "Carrot", 443120],
]

$ xsh -q  xpath-max-min-11117492-correct.xsh
<category_id>443120 </category_id>
...
443026
max: 445720
min: 443026

$ cat xpath-max-min-11117492-correct.xsh
open "xpath-max-min-11117492.xml";
...
echo max: xsh:max( //category_id );
echo min: xsh:min( //category_id );