1XML::Catalog(3)       User Contributed Perl Documentation      XML::Catalog(3)
2
3
4

NAME

6       XML::Catalog - Resolve public identifiers and remap system identifiers
7

SYNOPSIS

9         use XML::Catalog;
10         my $catalog=XML::Catalog->new('/xml/catalog.cat');
11         $catalog->add('http://www.w3.org/xcatalog/mastercat.xml');
12         my $sysid=$catalog->resolve_public('-//John Cowan//LOC Diacritics');
13         my $newsysid=$catalog->remap_system('http://www.w3.org');
14         $parser->setHandlers(ExternEnt=>$catalog->get_handler($parser));
15
16   Oasis Example
17         $ perl -e 'use XML::Catalog; \
18         $pubid = q|-//OASIS//DTD DocBook XML V4.5//EN|; \
19         my $catalog=XML::Catalog->new("/etc/xml/catalog"); \
20         print $catalog->resolve_public($pubid), "\n";'
21
22         file:///usr/share/sgml/docbook/xml-dtd-4.5-1.0-51.el6/docbookx.dtd
23

DESCRIPTION

25       This module implements draft 0.4 of John Cowan's XML Catalog (formerly
26       known as XCatalog) proposal
27       (<http://www.ccil.org/~cowan/XML/XCatalog.html>).  Catalogs may be
28       written in either SOCAT or XML syntax (see the proposal for syntax
29       details); XML::Catalog will assume SOCAT syntax if the catalog is not
30       in well-formed XML syntax.
31
32       This module, as of 1.0.0, also supports Oasis XML catalogs.
33

CONSTRUCTOR

35       new(URL [,URL]*)
36           Read the catalog identified by URL and return a catalog object
37           implementing it.  If more than one URL is given, chain the
38           additional catalogs as extensions to the catalog (they will be
39           searched before catalogs specified by EXTEND entries).
40
41           All URLs must be absolute.  A URL with no protocol is treated as a
42           filename.
43

METHODS

45       add(URL [,URL]*)
46           Chain the catalogs identified by the URL(s) to the current catalog.
47
48       resolve_public(PUBID)
49           Translate the public identifier PUBID to a system identifier.
50           Returns undef if the identifier could not be translated.
51
52       remap_system(SYSID)
53           Remap the system identifier SYSID as specified by the catalog.
54           Returns SYSID unchanged if no remapping was found.
55
56       get_handler(PARSER)
57           Returns a coderef to a resolver suitable for use as the ExternEnt
58           handler for an XML::Parser object.  The resolver will first attempt
59           to resolve a public identifier if supplied, and then attempt to
60           remap the resulting system identifier (or the original system
61           identifier if no public identifier was supplied).  It will then
62           call the original ExternEnt handler associated with the parser
63           object.  PARSER is the parser object; it is needed as an argument
64           in order to obtain the original handler.
65
66       add_delegate($pubid,  $href)
67           TBD
68
69       add_extend($href)
70           TBD
71
72       add_extend_object($cat, $group )
73           TBD
74
75       add_map($pubid,  $href)
76           TBD
77
78       add_remap($sysid,  $href)
79           TBD
80
81       build($url)
82           create new catalog object
83
84       fix_base($url)
85           TBD
86
87       parse
88           TBD
89
90       parse_SOCAT($ct)
91           TBD
92
93       parse_XML($ct)
94           TBD
95
96       set_base($href)
97           TBD
98

BUGS / TODO

100       Searching of chained catalogs is not purely depth-first (EXTEND items
101       in a chained catalog will be searched before EXTEND items in the
102       original catalog.
103
104       Error checking leaves much to be desired.
105

AUTHOR

107       Current Author:
108
109               Jeff Fearn E<lt>jfearn@cpan.orgE<gt>.
110
111       Former Authors:
112
113               Eric Bohlman E<lt>ebohlman@netcom.comE<gt>.
114

116       Copyright (c) 1999-2000 Eric Bohlman.  All rights reserved.  Copyright
117       (c) 2013 Jeff Fearn. All rights reserved.
118
119       This program is free software; you can use/modify/redistribute it under
120       the same terms as Perl itself.
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124perl v5.32.0                      2020-07-28                   XML::Catalog(3)
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