Looking at it a bit further, and adding the expand_external_ents option, the following error is returned: 

syntax error at line 65, column 0, byte 2841:
<![%sgml.features;[
^
 at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/XML/P
+arser.pm line 188
 at /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/XML/P
+arser/Expat.pm line 469

[download]

So I've looked in Parser.pm at line 188 and put a debug statement to see what could be $arg: 

  eval {
    print "DEBUG: arg: $arg\n";
    $result = $expat->parse($arg);
  };

[download]

And $arg is in fact a file that starts like: 

<!DOCTYPE sect1 [<!-- ................................................
+...................... -->
<!-- DocBook XML DTD V4.5 ............................................
+..... -->
<!-- File docbookx.dtd ...............................................
+..... -->

<!-- Copyright 1992-2006 HaL Computer Systems, Inc.,
     O'Reilly & Associates, Inc., ArborText, Inc., Fujitsu Software

[download]

And at line 65 of that file is the sgml.features line: 

<!-- Enable SGML features ............................................
+..... -->

<!ENTITY % sgml.features "IGNORE">
<![%sgml.features;[
<!ENTITY % xml.features "IGNORE">
]]>

[download]

Doing a /usr-wide serach I found that there are several of these files in /share/sgml/docbook/, for instance:

./share/sgml/docbook/xml-dtd-4.5-1.0-33.fc8/docbookx.dtd

Could it be that the XML::Twig error is about such a file being broken ? If I do not care at this stage for any DOCTYPE declaration, can I still use 'straight' ENTITY declarations (w/o the DOCTYPE) so that XML::Twig can actually process them ?

Does this make any sense ;-) ?

In reply to Re: XML::Twig and ENTITY declarations by carcassonne
in thread XML::Twig and ENTITY declarations by carcassonne

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