NAME

XML::Char - validate characters for XML

SYNOPSIS

            

              
              
use XML::Char;
if (not XML::Char->valid("bell ".chr(7))) {
    die 'no way to store this string directly to XML';
}
use utf8;
use XML::Char;
if (XML::Char->valid("UTF8 je pořádný peklo")) {
    print "fuf, we are fine\n";
}
            
          

DESCRIPTION

For me it was kind of a surprised to learn that char(0) is a valid UTF-8 character. All of the 0-0x7F are...

            

              
              
Emo: well it's not because that they are valid utf-8 characters that you have to expect XML to accept them
            
          

Well of course not, now I know :-)

http://www.w3.org/TR/REC-xml/#charsets defines which characters XML processors MUST accept:

            

              
              
[2]     Char       ::=          #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
/* any Unicode character, excluding the surrogate blocks, FFFE, and FFFF. */
            
          

This module validates if a given string meets this criteria. In addition the string has to be a Perl UTF-8 string (is_utf8_string() - see "Unicode-Support" in perlapi).

valid($value)

Returns true or false if $value consists of valid UTF-8 XML characters.

LINKS

How can I strip invalid XML characters from strings in Perl?

Extensible Markup Language (XML) 1.0

Extensible Markup Language (XML) 1.1

AUTHOR

Jozef Kutej

Aristotle Pagaltzis - completely rewrote the initial Char.XS to handle the SvUTF8 flag

COPYRIGHT

Copyright 2009 Jozef Kutej, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.