Zip a Sub-Tree

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Perl example program showing how to zip compress and unzip a sub-tree within an XML document.

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# file: xmlZip.pl

use chilkat;

# Perl XML Zip-compress a sub-tree within an XML document.
$xml = new chilkat::CkXml();
	
$xml->LoadXmlFile("players.xml");
# XML file contains:
# <nfl>
# <linebackers>
# <lb><lastname>Urlacher</lastname><firstname>Brian</firstname><team>Chicago Bears</team></lb>
# </linebackers>
# <quarterbacks>
# <qb><lastname>Anderson</lastname><firstname>Derek</firstname><team>Cleveland Browns</team></qb>
# <qb><lastname>Baker</lastname><firstname>Matt</firstname><team>Dallas Cowboys</team></qb>
# <qb><lastname>Basanez</lastname><firstname>Brett</firstname><team>Carolina Panthers</team></qb>
# <qb><lastname>Batch</lastname><firstname>Charlie</firstname><team>Pittsburgh Steelers</team></qb>
# ...
# </quarterbacks>
# </nfl>
		
# This example will compress the "quarterbacks" sub-tree.
# First, move to the quarterbacks node:
$qb = $xml->FindChild("quarterbacks");

# Zip the entire tree:
$qb->ZipTree();

# Examine the XML source of the document:
print $xml->xml;

# Unzip the entire tree.
$qb->UnzipTree()
# The XML is now back to its original state.
	
	
# The XML looks like this when the "quarterbacks" sub-tree is zipped:
<nfl>
<linebackers>
<lb>
<lastname>Urlacher</lastname>
<firstname>Brian</firstname>
<team>Chicago Bears</team>
</lb>
</linebackers>
<quarterbacks>
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]]></quarterbacks>
</nfl>