I have an xml file whose structure basically contains one known tag, the root, and several tags within this that are not known. 
<tables>
  <junk1 type="junk1" name="rates" requiredfields="date,rate"/>
  <junk2 type="junk2" name="demands" requiredfields=""/>
  <detail name="schema.detail" requiredfields="date,rate,scenarioname"
+>
    <date mnemonic="date" name="The_Date" type="date" size="8"/>
    <rate mnemonic="rate" name="RATE" type="number" size=""/>
  </detail>
  <xyz name="schema.xyz" requiredfields="obsdate,wac,wala,wam">
    <obsdate mnemonic="obsdate" name="asofdate" type="summed" calc="to
+_char(asofdate,'mm/dd/yyyy')" size="8" required="false" cohort="true"
+/>
    <model mnemonic="model" name="model" type="summed" size="" require
+d="true" cohort="true" calc="trim('model')"/>
    <new mnemonic="new" name="ISNEW" type="char" size="" required="fal
+se" cohort="true"/>
    <loancount mnemonic="loancount" name="LoanCount" type="summed" siz
+e="8" required="false" cohort="fale" calc="sum(LOANCOUNT)"/>
    <cpr mnemonic="cpr" name="CPR" type="summed" size="8"
              calc="CASE WHEN SUM(a) != 0 THEN round((1-power(1-sum(b/
+100*a)/sum(a),12))*100,2) ELSE SUM(0) END" required="true" cohort="fa
+lse"/>
  </xyz>
 </tables

[download]

I need to produce an output file from this that looks like:
table name   field name   type   size   required   calc

I am trying to use XML::Simple to do this. However all of the examples I have found use a XML file that has a more defined form so that you can reference specific nodes. The issue I have is that new tables are being added to, so I need be be able to loop over these items generically.

I tried the following: 
my $xml = XMLin($xfile,ForceArray=>1)||die("unable to perform 'in' n")
+;

foreach $table (keys %{$xml->{tables}}){
print "$table\n";
}

[download]
thinking this would give me junk1, junk2, detail, and xyz but it actually doesn't return anything. It runs, but nothing is output. I thought that if I could this, I could then reference the tag elements like mnemonic and name with something like  $name=$xml->{$table}->{name};.

In reply to using xml::simple with unknown xml structure by ctaustin

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