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+=head1 NAME
+
+XML::LibXML::Common - Constants and Character Encoding Routines
+
+=head1 SYNOPSIS
+
+
+
+  use XML::LibXML::Common;
+
+  $encodedstring = encodeToUTF8( $name_of_encoding, $sting_to_encode );
+  $decodedstring = decodeFromUTF8($name_of_encoding, $string_to_decode );
+
+=head1 DESCRIPTION
+
+XML::LibXML::Common defines constants for all node types and provides interface
+to libxml2 charset conversion functions. 
+
+Since XML::LibXML use their own node type definitions, one may want to use
+XML::LibXML::Common in its compatibility mode: 
+
+
+=head2 Exporter TAGS
+
+
+
+  use XML::LibXML::Common qw(:libxml);
+
+C<<<<<< :libxml >>>>>> tag will use the XML::LibXML Compatibility mode, which defines the old 'XML_'
+node-type definitions.
+
+
+
+  use XML::LibXML::Common qw(:gdome);
+
+C<<<<<< :gdome >>>>>> tag will use the XML::GDOME Compatibility mode, which defines the old 'GDOME_'
+node-type definitions.
+
+
+
+  use XML::LibXML::Common qw(:w3c);
+
+This uses the nodetype definition names as specified for DOM.
+
+
+
+  use XML::LibXML::Common qw(:encoding);
+
+This tag can be used to export only the charset encoding functions of
+XML::LibXML::Common. 
+
+
+=head2 Exports
+
+By default the W3 definitions as defined in the DOM specifications and the
+encoding functions are exported by XML::LibXML::Common. 
+
+
+=head2 Encoding functions
+
+To encode or decode a string to or from UTF-8, XML::LibXML::Common exports two
+functions, which provide interfact to the encoding support in C<<<<<< libxml2 >>>>>>. Which encodings are supported by these functions depends on how C<<<<<< libxml2 >>>>>> was compiled. UTF-16 is always supported and on most installations, ISO
+encodings are supported as well. 
+
+This interface was useful for older versions of Perl. Since Perl >= 5.8
+provides similar funcions via the C<<<<<< Encode >>>>>> module, it is probably a good idea to use those instead. 
+
+=over 4
+
+=item encodeToUTF8
+
+  $encodedstring = encodeToUTF8( $name_of_encoding, $sting_to_encode );
+
+The function will convert a byte string from the specified encoding to an UTF-8
+encoded character string.
+
+
+=item decodeToUTF8
+
+  $decodedstring = decodeFromUTF8($name_of_encoding, $string_to_decode );
+
+This function converts an UTF-8 encoded character string to a specified
+encoding. Note that the conversion can raise an error if the given string
+contains characters that cannot be represented in the target encoding. 
+
+
+
+=back
+
+Both these functions report their errors on the standard error. If an error
+occours the function will croak(). To catch the error information it is
+required to call the encoding function from within an eval block in order to
+prevent the entire script from being stopped on encoding error.
+
+
+=head2 A note on history
+
+Before XML::LibXML 1.70, this class was available as a separate CPAN
+distribution, intended to provide functionality shared between XML::LibXML,
+XML::GDOME, and possibly other modules. Since there seems to be no progress in
+this direction, we decided to merge XML::LibXML::Common 0.13 and XML::LibXML
+1.70 to one CPAN distribution. 
+
+The merge also naturally eliminates a practical and urgent problem experienced
+by many XML::LibXML users on certain platforms, namely misterious misbehavior
+of XML::LibXML occurring if the installed (often pre-packaged) version of
+XML::LibXML::Common was compiled against an older version of libxml2 than
+XML::LibXML. 
+
+=head1 AUTHORS
+
+Matt Sergeant, 
+Christian Glahn, 
+Petr Pajas
+
+
+=head1 VERSION
+
+1.70
+
+=head1 COPYRIGHT
+
+2001-2007, AxKit.com Ltd.
+
+2002-2006, Christian Glahn.
+
+2006-2009, Petr Pajas.
+
+=cut