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Added news about the release of 1.0.19, Daniel

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Daniel Veillard
2002-07-08 15:38:56 +00:00
parent e3f99973fa
commit a23a152505
15 changed files with 321 additions and 303 deletions
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doc/extensions.html
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@@ -78,24 +78,24 @@ A:link, A:visited, A:active { text-decoration: underline }
<h3>Table of content</h3>
<ul>
<li><a href="extensions.html#Introducti">Introduction</a></li>
<li><a href="extensions.html#Basics">Basics</a></li>
<li><a href="extensions.html#Keep">Extension modules</a></li>
<li><a href="extensions.html#Registerin">Registering a module</a></li>
<li><a href="extensions.html#module">Loading a module</a></li>
<li><a href="extensions.html#Registerin1">Registering an extension
<li><a href="extensions.html#Basics">Basics</a></li>
<li><a href="extensions.html#Keep">Extension modules</a></li>
<li><a href="extensions.html#Registerin">Registering a module</a></li>
<li><a href="extensions.html#module">Loading a module</a></li>
<li><a href="extensions.html#Registerin1">Registering an extension
function</a></li>
<li><a href="extensions.html#Implementi">Implementing an extension
<li><a href="extensions.html#Implementi">Implementing an extension
function</a></li>
<li><a href="extensions.html#Examples">Examples for extension
<li><a href="extensions.html#Examples">Examples for extension
functions</a></li>
<li><a href="extensions.html#Registerin2">Registering an extension
<li><a href="extensions.html#Registerin2">Registering an extension
element</a></li>
<li><a href="extensions.html#Implementi1">Implementing an extension
<li><a href="extensions.html#Implementi1">Implementing an extension
element</a></li>
<li><a href="extensions.html#Example">Example for extension
<li><a href="extensions.html#Example">Example for extension
elements</a></li>
<li><a href="extensions.html#shutdown">The shutdown of a module</a></li>
<li><a href="extensions.html#Future">Future work</a></li>
<li><a href="extensions.html#shutdown">The shutdown of a module</a></li>
<li><a href="extensions.html#Future">Future work</a></li>
</ul>
<h3><a name="Introducti1">Introduction</a></h3>
<p>This document describes the work needed to write extensions to the
@@ -110,7 +110,7 @@ two <a href="http://www.w3.org/TR/xslt">ways to extend an XSLT engine</a>:</p>
<ul>
<li>providing <a href="http://www.w3.org/TR/xslt">new extension
functions</a> which can be called from XPath expressions</li>
<li>providing <a href="http://www.w3.org/TR/xslt">new extension
<li>providing <a href="http://www.w3.org/TR/xslt">new extension
elements</a> which can be inserted in stylesheets</li>
</ul>
<p>In both cases the extensions need to be associated to a new namespace,
@@ -133,8 +133,8 @@ element.</p>
<p>And extension module is defined by 3 objects:</p>
<ul>
<li>the namespace name associated</li>
<li>an initialization function</li>
<li>a shutdown function</li>
<li>an initialization function</li>
<li>a shutdown function</li>
</ul>
<h3><a name="Registerin">Registering a module</a></h3>
<p>Currently a libxslt module has to be compiled within the application using
@@ -174,10 +174,10 @@ typedef void *(*xsltExtInitFunction)(xsltTransformContextPtr ctxt,
<li>the function gets passed the namespace name URI as an argument, this
allow a single function to provide the initialization for multiple
logical modules</li>
<li>it also gets passed a transformation context, the initialization is
<li>it also gets passed a transformation context, the initialization is
done at run time before any processing occurs on the stylesheet but it
will be invoked separately each time for each transformation</li>
<li>it returns a pointer, this can be used to store module specific
<li>it returns a pointer, this can be used to store module specific
informations which can be retrieved later when a function or an element
from the extension are used, an obvious example is a connection to a
database which should be kept and reused along the transformation. NULL
@@ -188,7 +188,7 @@ typedef void *(*xsltExtInitFunction)(xsltTransformContextPtr ctxt,
<ul>
<li>prepare the context for this module (like opening the database
connection)</li>
<li>register the extensions specific to this module</li>
<li>register the extensions specific to this module</li>
</ul>
<h3><a name="Registerin1">Registering an extension function</a></h3>
<p>There is a single call to do this registration:</p>
@@ -222,8 +222,8 @@ find one from the other:</p>
<pre>xsltTransformContextPtr
xsltXPathGetTransformContext
(xmlXPathParserContextPtr ctxt);</pre>
</li>
<li>The <code>xmlXPathContextPtr</code> associated to an
</li>
<li>The <code>xmlXPathContextPtr</code> associated to an
<code>xsltTransformContext</code> is stored in the <code>xpathCtxt</code>
field.</li>
</ul>
@@ -260,7 +260,7 @@ registering the module.</p>
<li>push the return value on the stack using <code>valuePush(ctxt,
obj)</code>
</li>
<li>deallocate the parameters passed to the function using
<li>deallocate the parameters passed to the function using
<code>xmlXPathFreeObject(obj)</code>
</li>
</ul>
@@ -420,11 +420,11 @@ close the connection to the database to keep the same example.</p>
<p>Well some of the pieces missing:</p>
<ul>
<li>a way to load shared libraries to instanciate new modules</li>
<li>a better detection of extension function usage and their registration
<li>a better detection of extension function usage and their registration
without having to use the extension prefix which ought to be reserved to
element extensions.</li>
<li>more examples</li>
<li>implementations of the <a href="http://www.exslt.org/">EXSLT</a> common
<li>more examples</li>
<li>implementations of the <a href="http://www.exslt.org/">EXSLT</a> common
extension libraries, Thomas Broyer nearly finished implementing them.</li>
</ul>
<p>