I have been scratching my head trying to figure out what is wrong with my parsing rules and I find put in some print statements in the rules and found that XML::Rules is parsing the XML "inside out". I am reading through the XML top to bottom to develop my rules and logic and find I am missing some info. Now I see why.

take the following example: 

<?xml version="1.0"?><xmltest xmlns="http://localhost/nothing">
<summary>
  <item>
    <value>1.0</value>
  </item>
</summary>
<detail1>
  <item>
    <value>2.0</value>
  </item>
</detail1>
<detail2>
  <item>
    <value>3.0</value>
  </item>
</detail2>
</xmltest>

[download]
I have been attacking this (seemingly) incorrectly with rules like the following: 
my @rules_lpo = (
  default => sub {
     $_[0] => $_[1]->{_content};
    print "$_[0] : $_[1]->{_content}\n";
  },
  'summary' => sub {
    $insummary = 1;
  },
  'detail1' => sub {
    $ind1 = 1;
    $insummary = 0;
  },
  'detail2' => sub {
    $ind2 = 1;
    $ind1 = 0;
  },
  'item' => sub {
    if ($insummary) {
      $sumvalue = $_[1]->{value};
    }
    if ($ind1) {
      $d1value = $_[1]->{value};
    }
    if ($ind2) {
      $d2value = $_[1]->{value};
    }
  }
);

[download]

This does not work. value is processed before item which is processed before the outside tag so the flags get set AFTER the section has already processed the guts. I only saw this from the print statement in '_default' rule which I added out of sheer frustration.

The result is $sumvalue is equal to d1 value, $d1value = d2 value and $d2value is never set. I have been losing my mind over this.

How do I properly handle duplicate tags in different sections if I cannot flag them due to the way the XMl is processed in this inside out manner???

Update: Updated the XML to have proper wrapper.

In reply to XML::Rules parsing inside out? by bfdi533

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