-<?xml version="1.0" encoding="ISO-8859-1"?>\r
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">\r
-<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /><link rel="SHORTCUT ICON" href="/favicon.ico" /><style type="text/css">\r
-TD {font-family: Verdana,Arial,Helvetica}\r
-BODY {font-family: Verdana,Arial,Helvetica; margin-top: 2em; margin-left: 0em; margin-right: 0em}\r
-H1 {font-family: Verdana,Arial,Helvetica}\r
-H2 {font-family: Verdana,Arial,Helvetica}\r
-H3 {font-family: Verdana,Arial,Helvetica}\r
-A:link, A:visited, A:active { text-decoration: underline }\r
-</style><title>Namespaces</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>Namespaces</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="http://xmlsoft.org/wiki">Wiki</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://www.blastwave.org/packages.php/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</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://rubyforge.org/projects/xml-tools/">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>The libxml2 library implements <a href="http://www.w3.org/TR/REC-xml-names/">XML namespaces</a> support by\r
-recognizing namespace constructs in the input, and does namespace lookup\r
-automatically when building the DOM tree. A namespace declaration is\r
-associated with an in-memory structure and all elements or attributes within\r
-that namespace point to it. Hence testing the namespace is a simple and fast\r
-equality operation at the user level.</p><p>I suggest that people using libxml2 use a namespace, and declare it in the\r
-root element of their document as the default namespace. Then they don't need\r
-to use the prefix in the content but we will have a basis for future semantic\r
-refinement and merging of data from different sources. This doesn't increase\r
-the size of the XML output significantly, but significantly increases its\r
-value in the long-term. Example:</p><pre><mydoc xmlns="http://mydoc.example.org/schemas/">\r
- <elem1>...</elem1>\r
- <elem2>...</elem2>\r
-</mydoc></pre><p>The namespace value has to be an absolute URL, but the URL doesn't have to\r
-point to any existing resource on the Web. It will bind all the element and\r
-attributes with that URL. I suggest to use an URL within a domain you\r
-control, and that the URL should contain some kind of version information if\r
-possible. For example, <code>"http://www.gnome.org/gnumeric/1.0/"</code> is a\r
-good namespace scheme.</p><p>Then when you load a file, make sure that a namespace carrying the\r
-version-independent prefix is installed on the root element of your document,\r
-and if the version information don't match something you know, warn the user\r
-and be liberal in what you accept as the input. Also do *not* try to base\r
-namespace checking on the prefix value. <foo:text> may be exactly the\r
-same as <bar:text> in another document. What really matters is the URI\r
-associated with the element or the attribute, not the prefix string (which is\r
-just a shortcut for the full URI). In libxml, element and attributes have an\r
-<code>ns</code> field pointing to an xmlNs structure detailing the namespace\r
-prefix and its URI.</p><p>@@Interfaces@@</p><pre>xmlNodePtr node;\r
-if(!strncmp(node->name,"mytag",5)\r
- && node->ns\r
- && !strcmp(node->ns->href,"http://www.mysite.com/myns/1.0")) {\r
- ...\r
-}</pre><p>Usually people object to using namespaces together with validity checking.\r
-I will try to make sure that using namespaces won't break validity checking,\r
-so even if you plan to use or currently are using validation I strongly\r
-suggest adding namespaces to your document. A default namespace scheme\r
-<code>xmlns="http://...."</code> should not break validity even on less\r
-flexible parsers. Using namespaces to mix and differentiate content coming\r
-from multiple DTDs will certainly break current validation schemes. To check\r
-such documents one needs to use schema-validation, which is supported in\r
-libxml2 as well. See <a href="http://www.relaxng.org/">relagx-ng</a> and <a href="http://www.w3c.org/XML/Schema">w3c-schema</a>.</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>\r
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /><link rel="SHORTCUT ICON" href="/favicon.ico" /><style type="text/css">
+TD {font-family: Verdana,Arial,Helvetica}
+BODY {font-family: Verdana,Arial,Helvetica; margin-top: 2em; margin-left: 0em; margin-right: 0em}
+H1 {font-family: Verdana,Arial,Helvetica}
+H2 {font-family: Verdana,Arial,Helvetica}
+H3 {font-family: Verdana,Arial,Helvetica}
+A:link, A:visited, A:active { text-decoration: underline }
+</style><title>Namespaces</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>Namespaces</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="http://xmlsoft.org/wiki">Wiki</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://www.blastwave.org/packages.php/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</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://rubyforge.org/projects/xml-tools/">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>The libxml2 library implements <a href="http://www.w3.org/TR/REC-xml-names/">XML namespaces</a> support by
+recognizing namespace constructs in the input, and does namespace lookup
+automatically when building the DOM tree. A namespace declaration is
+associated with an in-memory structure and all elements or attributes within
+that namespace point to it. Hence testing the namespace is a simple and fast
+equality operation at the user level.</p><p>I suggest that people using libxml2 use a namespace, and declare it in the
+root element of their document as the default namespace. Then they don't need
+to use the prefix in the content but we will have a basis for future semantic
+refinement and merging of data from different sources. This doesn't increase
+the size of the XML output significantly, but significantly increases its
+value in the long-term. Example:</p><pre><mydoc xmlns="http://mydoc.example.org/schemas/">
+ <elem1>...</elem1>
+ <elem2>...</elem2>
+</mydoc></pre><p>The namespace value has to be an absolute URL, but the URL doesn't have to
+point to any existing resource on the Web. It will bind all the element and
+attributes with that URL. I suggest to use an URL within a domain you
+control, and that the URL should contain some kind of version information if
+possible. For example, <code>"http://www.gnome.org/gnumeric/1.0/"</code> is a
+good namespace scheme.</p><p>Then when you load a file, make sure that a namespace carrying the
+version-independent prefix is installed on the root element of your document,
+and if the version information don't match something you know, warn the user
+and be liberal in what you accept as the input. Also do *not* try to base
+namespace checking on the prefix value. <foo:text> may be exactly the
+same as <bar:text> in another document. What really matters is the URI
+associated with the element or the attribute, not the prefix string (which is
+just a shortcut for the full URI). In libxml, element and attributes have an
+<code>ns</code> field pointing to an xmlNs structure detailing the namespace
+prefix and its URI.</p><p>@@Interfaces@@</p><pre>xmlNodePtr node;
+if(!strncmp(node->name,"mytag",5)
+ && node->ns
+ && !strcmp(node->ns->href,"http://www.mysite.com/myns/1.0")) {
+ ...
+}</pre><p>Usually people object to using namespaces together with validity checking.
+I will try to make sure that using namespaces won't break validity checking,
+so even if you plan to use or currently are using validation I strongly
+suggest adding namespaces to your document. A default namespace scheme
+<code>xmlns="http://...."</code> should not break validity even on less
+flexible parsers. Using namespaces to mix and differentiate content coming
+from multiple DTDs will certainly break current validation schemes. To check
+such documents one needs to use schema-validation, which is supported in
+libxml2 as well. See <a href="http://www.relaxng.org/">relagx-ng</a> and <a href="http://www.w3c.org/XML/Schema">w3c-schema</a>.</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>
projects / reactos.git / blobdiff