Annotation of embedaddon/libxml2/doc/catalog.html, revision 1.1
1.1 ! misho 1: <?xml version="1.0" encoding="UTF-8"?>
! 2: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
! 3: <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="SHORTCUT ICON" href="/favicon.ico" /><style type="text/css">
! 4: TD {font-family: Verdana,Arial,Helvetica}
! 5: BODY {font-family: Verdana,Arial,Helvetica; margin-top: 2em; margin-left: 0em; margin-right: 0em}
! 6: H1 {font-family: Verdana,Arial,Helvetica}
! 7: H2 {font-family: Verdana,Arial,Helvetica}
! 8: H3 {font-family: Verdana,Arial,Helvetica}
! 9: A:link, A:visited, A:active { text-decoration: underline }
! 10: </style><title>Catalog support</title></head><body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"><table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr><td width="120"><a href="http://swpat.ffii.org/"><img src="epatents.png" alt="Action against software patents" /></a></td><td width="180"><a href="http://www.gnome.org/"><img src="gnome2.png" alt="Gnome2 Logo" /></a><a href="http://www.w3.org/Status"><img src="w3c.png" alt="W3C Logo" /></a><a href="http://www.redhat.com/"><img src="redhat.gif" alt="Red Hat Logo" /></a><div align="left"><a href="http://xmlsoft.org/"><img src="Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" /></a></div></td><td><table border="0" width="90%" cellpadding="2" cellspacing="0" align="center" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3" bgcolor="#fffacd"><tr><td align="center"><h1>The XML C parser and toolkit of Gnome</h1><h2>Catalog support</h2></td></tr></table></td></tr></table></td></tr></table><table border="0" cellpadding="4" cellspacing="0" width="100%" align="center"><tr><td bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="2" width="100%"><tr><td valign="top" width="200" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Main Menu</b></center></td></tr><tr><td bgcolor="#fffacd"><form action="search.php" enctype="application/x-www-form-urlencoded" method="get"><input name="query" type="text" size="20" value="" /><input name="submit" type="submit" value="Search ..." /></form><ul><li><a href="index.html">Home</a></li><li><a href="html/index.html">Reference Manual</a></li><li><a href="intro.html">Introduction</a></li><li><a href="FAQ.html">FAQ</a></li><li><a href="docs.html" style="font-weight:bold">Developer Menu</a></li><li><a href="bugs.html">Reporting bugs and getting help</a></li><li><a href="help.html">How to help</a></li><li><a href="downloads.html">Downloads</a></li><li><a href="news.html">Releases</a></li><li><a href="XMLinfo.html">XML</a></li><li><a href="XSLT.html">XSLT</a></li><li><a href="xmldtd.html">Validation & DTDs</a></li><li><a href="encoding.html">Encodings support</a></li><li><a href="catalog.html">Catalog support</a></li><li><a href="namespaces.html">Namespaces</a></li><li><a href="contribs.html">Contributions</a></li><li><a href="examples/index.html" style="font-weight:bold">Code Examples</a></li><li><a href="html/index.html" style="font-weight:bold">API Menu</a></li><li><a href="guidelines.html">XML Guidelines</a></li><li><a href="ChangeLog.html">Recent Changes</a></li></ul></td></tr></table><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Related links</b></center></td></tr><tr><td bgcolor="#fffacd"><ul><li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li><li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li><li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li><li><a href="http://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li><li><a href="ftp://xmlsoft.org/">FTP</a></li><li><a href="http://www.zlatkovic.com/projects/libxml/">Windows binaries</a></li><li><a href="http://opencsw.org/packages/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</a></li><li><a href="http://codespeak.net/lxml/">lxml Python bindings</a></li><li><a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl bindings</a></li><li><a href="http://libxmlplusplus.sourceforge.net/">C++ bindings</a></li><li><a href="http://www.zend.com/php5/articles/php5-xmlphp.php#Heading4">PHP bindings</a></li><li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li><li><a href="http://libxml.rubyforge.org/">Ruby bindings</a></li><li><a href="http://tclxml.sourceforge.net/">Tcl bindings</a></li><li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Bug Tracker</a></li></ul></td></tr></table></td></tr></table></td><td valign="top" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%"><tr><td><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table border="0" cellpadding="3" cellspacing="1" width="100%"><tr><td bgcolor="#fffacd"><p>Table of Content:</p><ol><li><a href="General2">General overview</a></li>
! 11: <li><a href="#definition">The definition</a></li>
! 12: <li><a href="#Simple">Using catalogs</a></li>
! 13: <li><a href="#Some">Some examples</a></li>
! 14: <li><a href="#reference">How to tune catalog usage</a></li>
! 15: <li><a href="#validate">How to debug catalog processing</a></li>
! 16: <li><a href="#Declaring">How to create and maintain catalogs</a></li>
! 17: <li><a href="#implemento">The implementor corner quick review of the
! 18: API</a></li>
! 19: <li><a href="#Other">Other resources</a></li>
! 20: </ol><h3><a name="General2" id="General2">General overview</a></h3><p>What is a catalog? Basically it's a lookup mechanism used when an entity
! 21: (a file or a remote resource) references another entity. The catalog lookup
! 22: is inserted between the moment the reference is recognized by the software
! 23: (XML parser, stylesheet processing, or even images referenced for inclusion
! 24: in a rendering) and the time where loading that resource is actually
! 25: started.</p><p>It is basically used for 3 things:</p><ul><li>mapping from "logical" names, the public identifiers and a more
! 26: concrete name usable for download (and URI). For example it can associate
! 27: the logical name
! 28: <p>"-//OASIS//DTD DocBook XML V4.1.2//EN"</p>
! 29: <p>of the DocBook 4.1.2 XML DTD with the actual URL where it can be
! 30: downloaded</p>
! 31: <p>http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd</p>
! 32: </li>
! 33: <li>remapping from a given URL to another one, like an HTTP indirection
! 34: saying that
! 35: <p>"http://www.oasis-open.org/committes/tr.xsl"</p>
! 36: <p>should really be looked at</p>
! 37: <p>"http://www.oasis-open.org/committes/entity/stylesheets/base/tr.xsl"</p>
! 38: </li>
! 39: <li>providing a local cache mechanism allowing to load the entities
! 40: associated to public identifiers or remote resources, this is a really
! 41: important feature for any significant deployment of XML or SGML since it
! 42: allows to avoid the aleas and delays associated to fetching remote
! 43: resources.</li>
! 44: </ul><h3><a name="definition" id="definition">The definitions</a></h3><p>Libxml, as of 2.4.3 implements 2 kind of catalogs:</p><ul><li>the older SGML catalogs, the official spec is SGML Open Technical
! 45: Resolution TR9401:1997, but is better understood by reading <a href="http://www.jclark.com/sp/catalog.htm">the SP Catalog page</a> from
! 46: James Clark. This is relatively old and not the preferred mode of
! 47: operation of libxml.</li>
! 48: <li><a href="http://www.oasis-open.org/committees/entity/spec.html">XML
! 49: Catalogs</a> is far more flexible, more recent, uses an XML syntax and
! 50: should scale quite better. This is the default option of libxml.</li>
! 51: </ul><p></p><h3><a name="Simple" id="Simple">Using catalog</a></h3><p>In a normal environment libxml2 will by default check the presence of a
! 52: catalog in /etc/xml/catalog, and assuming it has been correctly populated,
! 53: the processing is completely transparent to the document user. To take a
! 54: concrete example, suppose you are authoring a DocBook document, this one
! 55: starts with the following DOCTYPE definition:</p><pre><?xml version='1.0'?>
! 56: <!DOCTYPE book PUBLIC "-//Norman Walsh//DTD DocBk XML V3.1.4//EN"
! 57: "http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd"></pre><p>When validating the document with libxml, the catalog will be
! 58: automatically consulted to lookup the public identifier "-//Norman Walsh//DTD
! 59: DocBk XML V3.1.4//EN" and the system identifier
! 60: "http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd", and if these entities have
! 61: been installed on your system and the catalogs actually point to them, libxml
! 62: will fetch them from the local disk.</p><p style="font-size: 10pt"><strong>Note</strong>: Really don't use this
! 63: DOCTYPE example it's a really old version, but is fine as an example.</p><p>Libxml2 will check the catalog each time that it is requested to load an
! 64: entity, this includes DTD, external parsed entities, stylesheets, etc ... If
! 65: your system is correctly configured all the authoring phase and processing
! 66: should use only local files, even if your document stays portable because it
! 67: uses the canonical public and system ID, referencing the remote document.</p><h3><a name="Some" id="Some">Some examples:</a></h3><p>Here is a couple of fragments from XML Catalogs used in libxml2 early
! 68: regression tests in <code>test/catalogs</code> :</p><pre><?xml version="1.0"?>
! 69: <!DOCTYPE catalog PUBLIC
! 70: "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
! 71: "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
! 72: <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
! 73: <public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN"
! 74: uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/>
! 75: ...</pre><p>This is the beginning of a catalog for DocBook 4.1.2, XML Catalogs are
! 76: written in XML, there is a specific namespace for catalog elements
! 77: "urn:oasis:names:tc:entity:xmlns:xml:catalog". The first entry in this
! 78: catalog is a <code>public</code> mapping it allows to associate a Public
! 79: Identifier with an URI.</p><pre>...
! 80: <rewriteSystem systemIdStartString="http://www.oasis-open.org/docbook/"
! 81: rewritePrefix="file:///usr/share/xml/docbook/"/>
! 82: ...</pre><p>A <code>rewriteSystem</code> is a very powerful instruction, it says that
! 83: any URI starting with a given prefix should be looked at another URI
! 84: constructed by replacing the prefix with an new one. In effect this acts like
! 85: a cache system for a full area of the Web. In practice it is extremely useful
! 86: with a file prefix if you have installed a copy of those resources on your
! 87: local system.</p><pre>...
! 88: <delegatePublic publicIdStartString="-//OASIS//DTD XML Catalog //"
! 89: catalog="file:///usr/share/xml/docbook.xml"/>
! 90: <delegatePublic publicIdStartString="-//OASIS//ENTITIES DocBook XML"
! 91: catalog="file:///usr/share/xml/docbook.xml"/>
! 92: <delegatePublic publicIdStartString="-//OASIS//DTD DocBook XML"
! 93: catalog="file:///usr/share/xml/docbook.xml"/>
! 94: <delegateSystem systemIdStartString="http://www.oasis-open.org/docbook/"
! 95: catalog="file:///usr/share/xml/docbook.xml"/>
! 96: <delegateURI uriStartString="http://www.oasis-open.org/docbook/"
! 97: catalog="file:///usr/share/xml/docbook.xml"/>
! 98: ...</pre><p>Delegation is the core features which allows to build a tree of catalogs,
! 99: easier to maintain than a single catalog, based on Public Identifier, System
! 100: Identifier or URI prefixes it instructs the catalog software to look up
! 101: entries in another resource. This feature allow to build hierarchies of
! 102: catalogs, the set of entries presented should be sufficient to redirect the
! 103: resolution of all DocBook references to the specific catalog in
! 104: <code>/usr/share/xml/docbook.xml</code> this one in turn could delegate all
! 105: references for DocBook 4.2.1 to a specific catalog installed at the same time
! 106: as the DocBook resources on the local machine.</p><h3><a name="reference" id="reference">How to tune catalog usage:</a></h3><p>The user can change the default catalog behaviour by redirecting queries
! 107: to its own set of catalogs, this can be done by setting the
! 108: <code>XML_CATALOG_FILES</code> environment variable to a list of catalogs, an
! 109: empty one should deactivate loading the default <code>/etc/xml/catalog</code>
! 110: default catalog</p><h3><a name="validate" id="validate">How to debug catalog processing:</a></h3><p>Setting up the <code>XML_DEBUG_CATALOG</code> environment variable will
! 111: make libxml2 output debugging information for each catalog operations, for
! 112: example:</p><pre>orchis:~/XML -> xmllint --memory --noout test/ent2
! 113: warning: failed to load external entity "title.xml"
! 114: orchis:~/XML -> export XML_DEBUG_CATALOG=
! 115: orchis:~/XML -> xmllint --memory --noout test/ent2
! 116: Failed to parse catalog /etc/xml/catalog
! 117: Failed to parse catalog /etc/xml/catalog
! 118: warning: failed to load external entity "title.xml"
! 119: Catalogs cleanup
! 120: orchis:~/XML -> </pre><p>The test/ent2 references an entity, running the parser from memory makes
! 121: the base URI unavailable and the the "title.xml" entity cannot be loaded.
! 122: Setting up the debug environment variable allows to detect that an attempt is
! 123: made to load the <code>/etc/xml/catalog</code> but since it's not present the
! 124: resolution fails.</p><p>But the most advanced way to debug XML catalog processing is to use the
! 125: <strong>xmlcatalog</strong> command shipped with libxml2, it allows to load
! 126: catalogs and make resolution queries to see what is going on. This is also
! 127: used for the regression tests:</p><pre>orchis:~/XML -> ./xmlcatalog test/catalogs/docbook.xml \
! 128: "-//OASIS//DTD DocBook XML V4.1.2//EN"
! 129: http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd
! 130: orchis:~/XML -> </pre><p>For debugging what is going on, adding one -v flags increase the verbosity
! 131: level to indicate the processing done (adding a second flag also indicate
! 132: what elements are recognized at parsing):</p><pre>orchis:~/XML -> ./xmlcatalog -v test/catalogs/docbook.xml \
! 133: "-//OASIS//DTD DocBook XML V4.1.2//EN"
! 134: Parsing catalog test/catalogs/docbook.xml's content
! 135: Found public match -//OASIS//DTD DocBook XML V4.1.2//EN
! 136: http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd
! 137: Catalogs cleanup
! 138: orchis:~/XML -> </pre><p>A shell interface is also available to debug and process multiple queries
! 139: (and for regression tests):</p><pre>orchis:~/XML -> ./xmlcatalog -shell test/catalogs/docbook.xml \
! 140: "-//OASIS//DTD DocBook XML V4.1.2//EN"
! 141: > help
! 142: Commands available:
! 143: public PublicID: make a PUBLIC identifier lookup
! 144: system SystemID: make a SYSTEM identifier lookup
! 145: resolve PublicID SystemID: do a full resolver lookup
! 146: add 'type' 'orig' 'replace' : add an entry
! 147: del 'values' : remove values
! 148: dump: print the current catalog state
! 149: debug: increase the verbosity level
! 150: quiet: decrease the verbosity level
! 151: exit: quit the shell
! 152: > public "-//OASIS//DTD DocBook XML V4.1.2//EN"
! 153: http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd
! 154: > quit
! 155: orchis:~/XML -> </pre><p>This should be sufficient for most debugging purpose, this was actually
! 156: used heavily to debug the XML Catalog implementation itself.</p><h3><a name="Declaring" id="Declaring">How to create and maintain</a> catalogs:</h3><p>Basically XML Catalogs are XML files, you can either use XML tools to
! 157: manage them or use <strong>xmlcatalog</strong> for this. The basic step is
! 158: to create a catalog the -create option provide this facility:</p><pre>orchis:~/XML -> ./xmlcatalog --create tst.xml
! 159: <?xml version="1.0"?>
! 160: <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
! 161: "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
! 162: <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/>
! 163: orchis:~/XML -> </pre><p>By default xmlcatalog does not overwrite the original catalog and save the
! 164: result on the standard output, this can be overridden using the -noout
! 165: option. The <code>-add</code> command allows to add entries in the
! 166: catalog:</p><pre>orchis:~/XML -> ./xmlcatalog --noout --create --add "public" \
! 167: "-//OASIS//DTD DocBook XML V4.1.2//EN" \
! 168: http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd tst.xml
! 169: orchis:~/XML -> cat tst.xml
! 170: <?xml version="1.0"?>
! 171: <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" \
! 172: "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
! 173: <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
! 174: <public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN"
! 175: uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/>
! 176: </catalog>
! 177: orchis:~/XML -> </pre><p>The <code>-add</code> option will always take 3 parameters even if some of
! 178: the XML Catalog constructs (like nextCatalog) will have only a single
! 179: argument, just pass a third empty string, it will be ignored.</p><p>Similarly the <code>-del</code> option remove matching entries from the
! 180: catalog:</p><pre>orchis:~/XML -> ./xmlcatalog --del \
! 181: "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" tst.xml
! 182: <?xml version="1.0"?>
! 183: <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
! 184: "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
! 185: <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/>
! 186: orchis:~/XML -> </pre><p>The catalog is now empty. Note that the matching of <code>-del</code> is
! 187: exact and would have worked in a similar fashion with the Public ID
! 188: string.</p><p>This is rudimentary but should be sufficient to manage a not too complex
! 189: catalog tree of resources.</p><h3><a name="implemento" id="implemento">The implementor corner quick review of the
! 190: API:</a></h3><p>First, and like for every other module of libxml, there is an
! 191: automatically generated <a href="html/libxml-catalog.html">API page for
! 192: catalog support</a>.</p><p>The header for the catalog interfaces should be included as:</p><pre>#include <libxml/catalog.h></pre><p>The API is voluntarily kept very simple. First it is not obvious that
! 193: applications really need access to it since it is the default behaviour of
! 194: libxml2 (Note: it is possible to completely override libxml2 default catalog
! 195: by using <a href="html/libxml-parser.html">xmlSetExternalEntityLoader</a> to
! 196: plug an application specific resolver).</p><p>Basically libxml2 support 2 catalog lists:</p><ul><li>the default one, global shared by all the application</li>
! 197: <li>a per-document catalog, this one is built if the document uses the
! 198: <code>oasis-xml-catalog</code> PIs to specify its own catalog list, it is
! 199: associated to the parser context and destroyed when the parsing context
! 200: is destroyed.</li>
! 201: </ul><p>the document one will be used first if it exists.</p><h4>Initialization routines:</h4><p>xmlInitializeCatalog(), xmlLoadCatalog() and xmlLoadCatalogs() should be
! 202: used at startup to initialize the catalog, if the catalog should be
! 203: initialized with specific values xmlLoadCatalog() or xmlLoadCatalogs()
! 204: should be called before xmlInitializeCatalog() which would otherwise do a
! 205: default initialization first.</p><p>The xmlCatalogAddLocal() call is used by the parser to grow the document
! 206: own catalog list if needed.</p><h4>Preferences setup:</h4><p>The XML Catalog spec requires the possibility to select default
! 207: preferences between public and system delegation,
! 208: xmlCatalogSetDefaultPrefer() allows this, xmlCatalogSetDefaults() and
! 209: xmlCatalogGetDefaults() allow to control if XML Catalogs resolution should
! 210: be forbidden, allowed for global catalog, for document catalog or both, the
! 211: default is to allow both.</p><p>And of course xmlCatalogSetDebug() allows to generate debug messages
! 212: (through the xmlGenericError() mechanism).</p><h4>Querying routines:</h4><p>xmlCatalogResolve(), xmlCatalogResolveSystem(), xmlCatalogResolvePublic()
! 213: and xmlCatalogResolveURI() are relatively explicit if you read the XML
! 214: Catalog specification they correspond to section 7 algorithms, they should
! 215: also work if you have loaded an SGML catalog with a simplified semantic.</p><p>xmlCatalogLocalResolve() and xmlCatalogLocalResolveURI() are the same but
! 216: operate on the document catalog list</p><h4>Cleanup and Miscellaneous:</h4><p>xmlCatalogCleanup() free-up the global catalog, xmlCatalogFreeLocal() is
! 217: the per-document equivalent.</p><p>xmlCatalogAdd() and xmlCatalogRemove() are used to dynamically modify the
! 218: first catalog in the global list, and xmlCatalogDump() allows to dump a
! 219: catalog state, those routines are primarily designed for xmlcatalog, I'm not
! 220: sure that exposing more complex interfaces (like navigation ones) would be
! 221: really useful.</p><p>The xmlParseCatalogFile() is a function used to load XML Catalog files,
! 222: it's similar as xmlParseFile() except it bypass all catalog lookups, it's
! 223: provided because this functionality may be useful for client tools.</p><h4>threaded environments:</h4><p>Since the catalog tree is built progressively, some care has been taken to
! 224: try to avoid troubles in multithreaded environments. The code is now thread
! 225: safe assuming that the libxml2 library has been compiled with threads
! 226: support.</p><p></p><h3><a name="Other" id="Other">Other resources</a></h3><p>The XML Catalog specification is relatively recent so there isn't much
! 227: literature to point at:</p><ul><li>You can find a good rant from Norm Walsh about <a href="http://www.arbortext.com/Think_Tank/XML_Resources/Issue_Three/issue_three.html">the
! 228: need for catalogs</a>, it provides a lot of context information even if
! 229: I don't agree with everything presented. Norm also wrote a more recent
! 230: article <a href="http://wwws.sun.com/software/xml/developers/resolver/article/">XML
! 231: entities and URI resolvers</a> describing them.</li>
! 232: <li>An <a href="http://home.ccil.org/~cowan/XML/XCatalog.html">old XML
! 233: catalog proposal</a> from John Cowan</li>
! 234: <li>The <a href="http://www.rddl.org/">Resource Directory Description
! 235: Language</a> (RDDL) another catalog system but more oriented toward
! 236: providing metadata for XML namespaces.</li>
! 237: <li>the page from the OASIS Technical <a href="http://www.oasis-open.org/committees/entity/">Committee on Entity
! 238: Resolution</a> who maintains XML Catalog, you will find pointers to the
! 239: specification update, some background and pointers to others tools
! 240: providing XML Catalog support</li>
! 241: <li>There is a <a href="buildDocBookCatalog">shell script</a> to generate
! 242: XML Catalogs for DocBook 4.1.2 . If it can write to the /etc/xml/
! 243: directory, it will set-up /etc/xml/catalog and /etc/xml/docbook based on
! 244: the resources found on the system. Otherwise it will just create
! 245: ~/xmlcatalog and ~/dbkxmlcatalog and doing:
! 246: <p><code>export XML_CATALOG_FILES=$HOME/xmlcatalog</code></p>
! 247: <p>should allow to process DocBook documentations without requiring
! 248: network accesses for the DTD or stylesheets</p>
! 249: </li>
! 250: <li>I have uploaded <a href="ftp://xmlsoft.org/libxml2/test/dbk412catalog.tar.gz">a
! 251: small tarball</a> containing XML Catalogs for DocBook 4.1.2 which seems
! 252: to work fine for me too</li>
! 253: <li>The <a href="http://www.xmlsoft.org/xmlcatalog_man.html">xmlcatalog
! 254: manual page</a></li>
! 255: </ul><p>If you have suggestions for corrections or additions, simply contact
! 256: me:</p><p><a href="bugs.html">Daniel Veillard</a></p></td></tr></table></td></tr></table></td></tr></table></td></tr></table></td></tr></table></body></html>
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to catalog.html CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libxml2 / doc