Handling XML in Perl

Perl module P668

Exercises, examples and other material relating to training module P668. This topic is presented on public course Perl for Larger Projects

Perl for Larger Projects - training course - Objects, huge data, SQL databases, XML, efficiency and other topics.

Perl for Larger Projects - Objects, huge data, SQL databases, XML, efficiency and other topics. This advanced course takes the Perl programmer through ...

http://www.wellho.net/course/plfull.html [course]

Using LWP to write Web Clients

As well as running server side scripts (through CGI, modPerl or ASP) and many uses independent of networks, Perl can be used to write server processes, ...

http://www.wellho.net/solutions/perl-usi ... ients.html [longer article]

Parsing XML through LibXML

#!/usr/bin/perl use XML::LibXML; $parser = new XML::LibXML; $struct = $parser -> parse_file("apps-admin.xml"); $rootel = $struct -> getDocumentElement(); ...

http://www.wellho.net/resources/ex.php4?item=p668/gnome.pl [code sample]

Using XML::Parser to extract information - practical example

#!/usr/bin/perl use XML::Parser; $parser = new XML::Parser(Style => "Subs", Pkg => "medline", Handlers => {Char => \&medline::baretext} ); $parser ...

http://www.wellho.net/resources/ex.php4?item=p668/medireport.pl [code sample]

Converting an XML document into a tree in Perl collection variables

#!/usr/bin/perl use XML::Parser; $parser = new XML::Parser(Style => "Tree"); $struct = $parser -> parsefile('apps-admin.xml'); displaylist("",$struct); ...

http://www.wellho.net/resources/ex.php4?item=p668/xml4.pl [code sample]

Direct use of the Expat module

#!/usr/bin/perl # Direct use of Expat - an example use XML::Parser::Expat; $parser = new XML::Parser::Expat(); $parser -> setHandlers(Start => \&e_entry, ...

http://www.wellho.net/resources/ex.php4?item=p668/exp.pl [code sample]

Parsing XML - first test program

#!/usr/bin/perl # XML from Perl - using XML::Parser use XML::Parser; $parser = new XML::Parser(); $parser -> parsefile('apps-admin.xml'); print "done\n";

http://www.wellho.net/resources/ex.php4?item=p668/xml0.pl [code sample]

The Extensible Markup Language (XML) is an important tool in structuring data. This training module covers the two major XML engines that are supported by Perl modules, and teaches you how to program using them. We also cover handling XSLT in Perl.

This topic is presented on public course Perl for Larger Projects

Examples from our training material

camels.xml	XML sample for xslt1 demo
camels.xsl	XSLT sample for xlst1.pl demo
exp.pl	Direct use of the Expat module
gnome.pl	Parsing XML through LibXML
goblin.pl	Altering an XML document through LibXML
medireport.pl	Using XML::Parser to extract information - practical example
mediweb.pl	Parsing XML within a cgi script
medline.pm	Class of XML element handlers
stdsubs.pm	Standard cgi handler to collect form data
xml0.pl	Parsing XML - first test program
xml1.pl	Using debug mode to quickly check a document
xml2.pl	Using Subs to report on an XML source
xml3.pl	Illustration of handling a stream
xml4.pl	Converting an XML document into a tree in Perl collection variables
xml5.pl	Alternative - using handlers
xslt1.pl	Using XML and XSLT to turn data into a web page

Background information

Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from http://www.training-notes.co.uk.

Topics covered in this module

What is XML?.
Availability of handling XML from Perl.
Parsing XML from Perl.
Installing the Expat library and XML::Parser.
The principles of a parser.
Styles.
Using subs.
Using Stream.
Event-based handlers.
Other controls possible for the constructor.
An example with a full set of data.
Putting it together.
Use of the XML::Parser::Expat.
Gnome - an alternative to the Expat library.
Using Gnome to edit XML.
Using XSLT from Perl.
Associated files.

Complete learning

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