xml::encoding(3) [redhat man page]

Encoding(3)						User Contributed Perl Documentation					       Encoding(3)

NAME

       XML::Encoding - A perl module for parsing XML encoding maps.

SYNOPSIS

	 use XML::Encoding;
	 my $em_parser = new XML::Encoding(ErrorContext  => 2,
					   ExpatRequired => 1,
					   PushPrefixFcn => &push_prefix,
					   PopPrefixFcn  => &pop_prefix,
					   RangeSetFcn	 => &range_set);

	 my $encmap_name = $em_parser->parsefile($ARGV[0]);

DESCRIPTION

       This module, which is built as a subclass of XML::Parser, provides a parser for encoding map files, which are XML files. The file
       maps/encmap.dtd in the distribution describes the structure of these files. Calling a parse method returns the name of the encoding map
       (obtained from the name attribute of the root element). The contents of the map are processed through the callback functions push_prefix,
       pop_prefix, and range_set.

METHODS

       This module provides no additional methods to those provided by XML::Parser, but it does take the following additional options.

       o ExpatRequired
	   When this has a true value, then an error occurs unless the encmap "expat" attribute is set to "yes". Whether or not the ExpatRequired
	   option is given, the parser enters expat mode if this attribute is set. In expat mode, the parser checks if the encoding violates expat
	   restrictions.

       o PushPrefixFcn
	   The corresponding value should be a code reference to be called when a prefix element starts. The single argument to the callback is an
	   integer which is the byte value of the prefix. An undef value should be returned if successful. If in expat mode, a defined value
	   causes an error and is used as the message string.

       o PopPrefixFcn
	   The corresponding value should be a code reference to be called when a prefix element ends. No arguments are passed to this function.
	   An undef value should be returned if successful. If in expat mode, a defined value causes an error and is used as the message string.

       o RangeSetFcn
	   The corresponding value should be a code reference to be called when a "range" or "ch" element is seen. The 3 arguments passed to this
	   function are: (byte, unicode_scalar, length) The byte is the starting byte of a range or the byte being mapped by a "ch" element. The
	   unicode_scalar is the Unicode value that this byte (with the current prefix) maps to. The length of the range is the last argument.
	   This will be 1 for the "ch" element. An undef value should be returned if successful. If in expat mode, a defined value causes an error
	   and is used as the message string.

AUTHOR

	   Clark Cooper <coopercc@netheaven.com>

SEE ALSO

       XML::Parser

perl v5.8.0							    1998-12-26							       Encoding(3)

XML::DOM::Parser(3)					User Contributed Perl Documentation				       XML::DOM::Parser(3)

NAME

       XML::DOM::Parser - An XML::Parser that builds XML::DOM document structures

SYNOPSIS

	use XML::DOM;

	my $parser = new XML::DOM::Parser;
	my $doc = $parser->parsefile ("file.xml");
	$doc->dispose; # Avoid memory leaks - cleanup circular references

DESCRIPTION

       XML::DOM::Parser extends XML::Parser

       The XML::Parser module was written by Clark Cooper and is built on top of XML::Parser::Expat, which is a lower level interface to James
       Clark's expat library.

       XML::DOM::Parser parses XML strings or files and builds a data structure that conforms to the API of the Document Object Model as described
       at http://www.w3.org/TR/REC-DOM-Level-1 <http://www.w3.org/TR/REC-DOM-Level-1>.	See the XML::Parser manpage for other additional
       properties of the XML::DOM::Parser class.  Note that the 'Style' property should not be used (it is set internally.)

       The XML::Parser NoExpand option is more or less supported, in that it will generate EntityReference objects whenever an entity reference is
       encountered in character data. I'm not sure how useful this is. Any comments are welcome.

       As described in the synopsis, when you create an XML::DOM::Parser object, the parse and parsefile methods create an XML::DOM::Document
       object from the specified input. This Document object can then be examined, modified and written back out to a file or converted to a
       string.

       When using XML::DOM with XML::Parser version 2.19 and up, setting the XML::DOM::Parser option KeepCDATA to 1 will store CDATASections in
       CDATASection nodes, instead of converting them to Text nodes.  Subsequent CDATASection nodes will be merged into one. Let me know if this
       is a problem.

Using LWP to parse URLs
       The parsefile() method now also supports URLs, e.g. http://www.erols.com/enno/xsa.xml.  It uses LWP to download the file and then calls
       parse() on the resulting string.  By default it will use a LWP::UserAgent that is created as follows:

	use LWP::UserAgent;
	$LWP_USER_AGENT = LWP::UserAgent->new;
	$LWP_USER_AGENT->env_proxy;

       Note that env_proxy reads proxy settings from environment variables, which is what I need to do to get thru our firewall. If you want to
       use a different LWP::UserAgent, you can either set it globally with:

	XML::DOM::Parser::set_LWP_UserAgent ($my_agent);

       or, you can specify it for a specific XML::DOM::Parser by passing it to the constructor:

	my $parser = new XML::DOM::Parser (LWP_UserAgent => $my_agent);

       Currently, LWP is used when the filename (passed to parsefile) starts with one of the following URL schemes: http, https, ftp, wais,
       gopher, or file (followed by a colon.)  If I missed one, please let me know.

       The LWP modules are part of libwww-perl which is available at CPAN.

perl v5.12.1							    2002-07-31						       XML::DOM::Parser(3)