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On errors not related to the XML parsing methods will throw exceptions. The Best Available backend type will check which backends are available and give you the "best" of those.For the default order of preference see the README with this distribution, but this can be changed with the option Prioritised List.If Xerces and Lib XML are available the following code will give you a Lib XML backend: There is a bug in versions 1.57 and 1.58 of XML:: Lib XML that causes an issue related to DTD loading.When a base parameter is used in conjunction with the load_ext_dtd method the base parameter is ignored and the current directory is used as the base parameter.I'm trying to write a perl script using Lib XML that validates a doc against a dtd and returns a boolean as to whether or not the doc is valid.I want to be able to run the script over a folder of xml files, report which are valid, which are not, and log the errors for those that are invalid.

Usually when HTML is parsed the document is saved with the HTML serializer, but with this option the resulting document is saved with the XML serializer.It also wasn't clear to me what the parse_file function returns as per the cpan docs.What's the best way to return a boolean val as to whether the doc is valid or not?However, I had to dig around a bit to find out how perform validated parsing (against an external DTD) using xmlval and xmldtd.The above recipe provides pretty much all the information you need to know for doing this. You may parse a DTD from either a string, or from an external SYSTEM identifier.No support is available as yet for parsing from a filehandle.The script I have does validate a doc, but it stops at the first invalid doc.use strict; use warnings; no warnings 'uninitialized'; use XML:: Lib XML; use IO:: Handle; # script to test dtd validity against test xml instance my $instance = 'C:\jason\code\perl\dev\well-formed-test\family-instance1.xml'; $instance =~ s#\#/#g; print "about to test $instance \nagainst dtd\n\n"; my $parser = XML:: Lib XML-fd_open as per this tutorial..Auto raises an error only if the file has a DTD or Schema, but it fails to validate against that DTD or Schema.XML:: Xerces requires the Apache Xerces C XML parsing library, available from

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