I had trouble with your second solution that involved " the '_all_' handler, and test each node for having children". When I ran it, as written, I got output like: 

(ArrayOfBooks) Book:
(ArrayOfBooks) Book:
(Book) Released:
(ArrayOfBooks) Book:
(ArrayOfBooks) Book:
(ArrayOfBooks) Book:
Can't call method "tag" on an undefined value at monk_twig_xml_leaf2.p
+l line 11.

 at monk_twig_xml_leaf2.pl line 19.
 at monk_twig_xml_leaf2.pl line 19.

[download]

I tried commenting out the "purge" call and got empty output with no errors, seemingly because $element->has_children was returning true for "#PCDATA" text nodes. I am new to XML:Twig, but not so new to XML, and am starting to appreciate XML::Twig's potential for optimization. I did come up with some working code as well but would first be interested in what I might be doing wrong that Preceptor's example wouldn't run.

Ron

In reply to Re^2: Is it possible to parse an XML file recursively using XML::Twig? by mr_ron
in thread Is it possible to parse an XML file recursively using XML::Twig? by Ppeoc

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.