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From dles...@apache.org
Subject cvs commit: xml-site/targets/xalan/design/images conceptual.gif data.gif org_apache.gif process.gif trax.gif xalan1_1x1.gif xmllogo.gif xpath.gif
Date Fri, 12 Jan 2001 21:29:52 GMT
dleslie     01/01/12 13:29:51

  Modified:    targets/xalan/design design1_1_0.html design2_0_0.html
  Removed:     targets/xalan/design/images conceptual.gif data.gif
                        org_apache.gif process.gif trax.gif xalan1_1x1.gif
                        xmllogo.gif xpath.gif
  Log:
  Xalan-J 2 design moved to Xalan J2 tree.
  
  Revision  Changes    Path
  1.5       +8 -8      xml-site/targets/xalan/design/design1_1_0.html
  
  Index: design1_1_0.html
  ===================================================================
  RCS file: /home/cvs/xml-site/targets/xalan/design/design1_1_0.html,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- design1_1_0.html	2000/07/28 13:26:49	1.4
  +++ design1_1_0.html	2001/01/12 21:29:17	1.5
  @@ -1,10 +1,10 @@
   <html>
  -  <head>
  -    <title>
  -    </title>
  -  </head>
  -  <body>
  -    <meta content="0; URL=design2_0_0.html" http-equiv="Refresh">
  -        Redirecting to <a href="design2_0_0.html">Xalan-J 2.0 Design</a>
  -  </body>
  +<head>
  +<title>
  +</title>
  +</head>
  +<body>
  +<meta content="0; URL=../../xalan-j/design/design2_0_0.html" http-equiv="Refresh">
  +      Redirecting to <a href="../../xalan-j/design/design2_0_0.html">Xalan-J 2.0 Design</a>
  +</body>
   </html>
  
  
  
  1.5       +10 -649   xml-site/targets/xalan/design/design2_0_0.html
  
  Index: design2_0_0.html
  ===================================================================
  RCS file: /home/cvs/xml-site/targets/xalan/design/design2_0_0.html,v
  retrieving revision 1.4
  retrieving revision 1.5
  diff -u -r1.4 -r1.5
  --- design2_0_0.html	2000/12/08 14:11:14	1.4
  +++ design2_0_0.html	2001/01/12 21:29:20	1.5
  @@ -1,649 +1,10 @@
  -<HTML><HEAD><TITLE>Xalan-J 2.0 Design</TITLE></HEAD><BODY alink="#ff0000" bgcolor="#ffffff" leftmargin="4" link="#0000ff" marginheight="4" marginwidth="4" text="#000000" topmargin="4" vlink="#0000aa"><H1><A href="http://xml.apache.org"><IMG src="images/xmllogo.gif"></A>&nbsp;&nbsp;
  -         Xalan-J 2.0 Design</H1><HR>
  -  <P></P>
  -  <P>Author: Scott Boag<BR>State: In Progress</P>
  -  <UL> 
  -	   <LI><A href="#intro">Introduction</A></LI>
  - 	   <LI><A href="#overarch">Overview of Architecture</A></LI>
  -	   <LI><A href="#process">Process Module</A></LI>
  -	   <LI><A href="#templates">Templates Module</A></LI>
  -	   <LI><A href="#transformer">Transformer Module</A></LI>
  -       <UL>
  -         <LI><A href="#stree">Stree Module</A></LI>
  -         <LI><A href="#extensions">Extensions Module</A></LI>
  -     </UL>
  -	   <LI><A href="#xpath">XPath Module</A></LI>
  -       <UL><LI><A href="#xpathdbconn">XPath Database Connection</A></LI></UL>
  -	   <LI><A href="#utils">Utils Package</A></LI>         
  -	   <LI><A href="#other">Other Packages</A></LI>         
  -	   <LI><A href="#coding">Coding Conventions</A></LI>
  -	   <LI><A href="#open">Open Issues</A><BR><BR></LI>     
  -   <LI><A href="http://xml.apache.org/xalan-j/index.html">Xalan-J 2.0 Uesr's Guide</A></LI>
  -   <LI><A href="http://xml.apache.org/xalan-j/apidocs/index.html">Xalan-J 2.0 Javadoc</A></LI>
  -  </UL><A name="intro"><!--anchor--></A>
  -  <H2>Introduction</H2> 
  -	 <P></P> 
  -	 <P>This document presents the basic design for Xalan-J 2.0, which is a
  -		<A href="http://www.awl.com/cseng/titles/0-201-89542-0/techniques/refactoring.htm">refactoring</A>
  -		and redesign of the Xalan-J 1.x processor. The main goals of this redesign are
  -		to: </P> 
  -	 <OL> 
  -		<LI>Make the design and code more understandable by Open Source
  -		  people.</LI> 
  -		<LI>Reduce code size and complexity.</LI>
  -		<LI>By simplifying the code, make optimization easier.</LI> 
  -		<LI>Make modules generally more localized, and less tangled with other
  -		  modules.</LI> 
  -		<LI>Begin the adoption of the TrAX (Transformations for XML)
  -		  interfaces.</LI> 
  -	 <LI>Increase the streamability of transformations.</LI></OL> 
  -	 <P>The techniques used toward these goals are to:</P> 
  -	 <OL> 
  -		<LI>In general, flatten the hierarchy of packages, in order to make the
  -		  structure more apparent from the top-level view.</LI> 
  -		<LI>Break the construction and the validation of the XSLT stylesheet from
  -		  the stylesheet objects themselves.</LI>
  -		<LI>Drive the construction of the stylesheet through a table, so that it
  -		  is less prone to error.</LI> 
  -		<LI>Break the transformation process into a separate package, away from
  -		  the stylesheet objects.</LI> 
  -		<LI>Create this design document, as a starting point for people interested in
  -		  approaching the code.</LI> 
  -	 </OL> 
  -	 <P>The goals are not:</P> 
  -	 <OL> 
  -		<LI>To add more features in the progress of this refactoring. This is
  -		  design and code clean-up in order to meet the above-named goals. We expect that it will be <B>much</B> easier to add
  -		  features once this work is completed.</LI> 
  -		<LI>To optimize code for the sake of optimization. However, we
  -		  expect that the code will be faster once this work is complete.</LI> 
  -	 </OL> 
  -	 <P>How well we've achieved the goals will be measured by feedback from the
  -		<A href="http://xml-archive.webweaving.org/xml-archive-xalan">Xalan-dev</A> list, and by software metrics tools.</P> 
  -	 <P>Please note that the diagrams in this design document are meant to be
  -		useful abstractions, and may not always be exact.</P> 
  -  <A name="overarch"><!--anchor--></A> 
  -  <H2>Overview of Architecture</H2> 
  -	 <P></P> 
  -	 <P>Xalan 2.0 is divided into four major modules, and various smaller
  -		modules. The main modules are:</P> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/processor/package-summary.html">org.apache.xalan.processor</A></FONT></CODE></DT> 
  -		<DD>The module that processes the stylesheet, and provides the main
  -		  entry point into Xalan.</DD> 
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/templates/package-summary.html">org.apache.xalan.templates</A></FONT></CODE></DT> 
  -		<DD>The module that defines the stylesheet structures, including the
  -		  Stylesheet object, template element instructions, and Attribute Value
  -		  Templates. </DD> 
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/transformer/package-summary.html">org.apache.xalan.transformer</A></FONT></CODE></DT> 
  -		<DD>The module that applies the source tree to the Templates, and
  -		  produces a result tree.</DD> 
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xpath/package-summary.html">org.apache.xpath</A></FONT></CODE></DT> 
  -		<DD>The module that processes both XPath expressions, and XSLT Match
  -		  patterns.</DD> 
  -	 </DL> 
  -	 <P>In addition to the above modules, Xalan implements the
  -		<A href="http://trax.openxml.org/">TrAX</A> interfaces, and depends on the
  -	 <A href="http://www.megginson.com/SAX/Java/index.html">SAX2</A> and <A href="http://www.w3.org/TR/DOM-Level-2/">DOM</A> packages.
  -</P><P><IMG src="images/trax.gif"></P><P>There is also a general utilities package that contains both XML utility
  -	 classes such as QName, but generally useful classes such as
  -	 StringToIntTable.</P> 
  -	 <P>In the diagram below, the dashed lines denote visibility. All packages
  -		access the SAX2 and DOM packages.</P> 
  -	 <P><IMG src="images/xalan1_1x1.gif"></P> 
  -	 <P>In addition to the above packages, there are the following additional
  -		packages:</P> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/client/package-summary.html">org.apache.xalan.client</A></FONT></CODE></DT> 
  -		<DD>This package has a client applet. I suspect this should be moved
  -		  into the samples directory.</DD> 
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/extensions/package-summary.html">org.apache.xalan.extensions</A></FONT></CODE></DT> 
  -		<DD>This holds classes belonging to the Xalan extensions mechanism,
  -		  which allows Java code and script to be called from within a stylesheet.</DD>
  -		
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/lib/package-summary.html">org.apache.xalan.lib</A></FONT></CODE></DT> 
  -		<DD>This is the built-in Xalan extensions library, which holds
  -		  extensions such as Redirect (which allows a stylesheet to produce multiple
  -		  output files).</DD> 
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/res/package-summary.html">org.apache.xalan.res</A></FONT></CODE></DT> 
  -		<DD>This holds resource files needed by Xalan, such as error message
  -		  resources.</DD> 
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/trace/package-summary.html">org.apache.xalan.trace</A></FONT></CODE></DT> 
  -		<DD>This package contains classes and interfaces that allow a caller to
  -		  add trace listeners to the transformation, allowing an interface to XSLT
  -		  debuggers and similar tools.</DD> 
  -	 </DL> 
  -	 <DL> 
  -		<DT><CODE><FONT face="courier, monospaced"><A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/xslt/package-summary.html">org.apache.xalan.xslt</A></FONT></CODE></DT> 
  -		<DD>This package is for backwards compatibility with applications that
  -		  depend on Xalan 1.x interfaces.</DD> 
  -	 </DL> 
  -  <P>A more conceptual view of this architecture is as follows:</P><P><IMG src="images/conceptual.gif"></P><A name="process"><!--anchor--></A> 
  -  <H2>Process Module</H2> 
  -	 <P></P> 
  -	 <P>The <CODE><FONT face="courier, monospaced">org.apache.xalan.process</FONT></CODE> module implements the
  -		<CODE><FONT face="courier, monospaced">org.apache.xalan.trax.Processor</FONT></CODE> interface, which provides a
  -		factory method for creating a concrete Processor instance, and provides methods
  -		for creating a <CODE><FONT face="courier, monospaced">org.apache.xalan.trax.Templates</FONT></CODE> instance, which, in
  -		Xalan and XSLT terms, is the Stylesheet. Thus the task of the process module is
  -		to read the XSLT input in the form of a file, stream, SAX events, or a DOM
  -		tree, and produce a Templates/Stylesheet object.</P> 
  -	 <P>The overall strategy is to define a schema that dictates the legal
  -		structure for XSLT elements and attributes, and to associate with those
  -		elements construction-time processors that can fill in the appropriate fields
  -		in the top-level Stylesheet object, and also associate classes in the templates
  -		module that can be created in a generalized fashion. This makes the validation
  -		object-to-class associations centralized and declarative.</P> 
  -	 <P>The schema's root class is
  -		<CODE><FONT face="courier, monospaced">org.apache.xalan.processor.XSLTSchema</FONT></CODE>, and it is here that the
  -		XSLT schema structure is defined. XSLTSchema uses
  -		<CODE><FONT face="courier, monospaced">org.apache.xalan.processor.XSLTElementDef</FONT></CODE> to define elements, and
  -		<CODE><FONT face="courier, monospaced">org.apache.xalan.processor.XSLTAttributeDef</FONT></CODE> to define attributes.
  -		Both classes hold the allowed namespace, local name, and type of element or
  -		attribute. The XSLTElementDef also holds a reference to a
  -		<CODE><FONT face="courier, monospaced">org.apache.xalan.processor.XSLTElementProcessor</FONT></CODE>, and a sometimes a
  -		<CODE><FONT face="courier, monospaced">Class</FONT></CODE> object, with which it can create objects that derive from
  -		<CODE><FONT face="courier, monospaced">org.apache.xalan.templates.ElemTemplateElement</FONT></CODE>. In addition, the
  -		XSLTElementDef instance holds a list of XSLTElementDef instances that define
  -		legal elements or character events that are allowed as children of the given
  -		element.</P> 
  -	 <P>The implementation of the <CODE><FONT face="courier, monospaced">org.apache.xalan.trax.Processor</FONT></CODE>
  -		interface is in <CODE><FONT face="courier, monospaced">org.apache.xalan.processor.StylesheetProcessor</FONT></CODE>,
  -		which creates a <CODE><FONT face="courier, monospaced">org.apache.xalan.processor.StylesheetHandler</FONT></CODE>
  -		instance. This instance acts as the ContentHandler for the parse events, and is
  -		handed to the <CODE><FONT face="courier, monospaced">org.xml.sax.XMLReader</FONT></CODE>, which the StylesheetProcessor
  -		uses to parse the XSLT document. The StylesheetHandler then receives the parse
  -		events, which maintains the state of the construction, and passes the events on
  -		to the appropriate XSLTElementProcessor for the given event, as dictated by the
  -		XSLTElementDef that is associated with the given event.</P> 
  -	 <P><IMG src="images/process.gif"></P> 
  -  <A name="templates"><!--anchor--></A> 
  -  <H2>Templates Module</H2> 
  -	 <P></P> 
  -	 <P>The <CODE><FONT face="courier, monospaced">org.apache.xalan.templates</FONT></CODE> module implements the
  -		<CODE><FONT face="courier, monospaced">org.apache.xalan.trax.Templates</FONT></CODE> interface, and defines a set of
  -		classes that represent a Stylesheet. The primary purpose of this module is to
  -		hold stylesheet data, not to perform procedural tasks associated with the
  -		construction of the data, nor tasks associated with the transformation itself.
  -		</P> 
  -	 <P>A <CODE><FONT face="courier, monospaced">StylesheetRoot</FONT></CODE>, which implements the
  -		<CODE><FONT face="courier, monospaced">Templates</FONT></CODE> interface, is a type of <CODE><FONT face="courier, monospaced">StylesheetComposed</FONT></CODE>,
  -		which is a <CODE><FONT face="courier, monospaced">Stylesheet</FONT></CODE> composed of itself and all included
  -		<CODE><FONT face="courier, monospaced">Stylesheet</FONT></CODE> objects. A <CODE><FONT face="courier, monospaced">StylesheetRoot</FONT></CODE> has a global
  -		imports list, which is a list of all imported <CODE><FONT face="courier, monospaced">StylesheetComposed</FONT></CODE>
  -		instances. From each <CODE><FONT face="courier, monospaced">StylesheetComposed</FONT></CODE> object, one can iterate
  -		through the list of directly or indirectly included <CODE><FONT face="courier, monospaced">Stylesheet</FONT></CODE>
  -		objects, and one call also iterate through the list of all
  -		<CODE><FONT face="courier, monospaced">StylesheetComposed</FONT></CODE> objects of lesser import precedence.
  -		<CODE><FONT face="courier, monospaced">StylesheetRoot</FONT></CODE> is a <CODE><FONT face="courier, monospaced">StylesheetComposed</FONT></CODE>, which is a
  -		<CODE><FONT face="courier, monospaced">Stylesheet</FONT></CODE>.</P> 
  -	 <P>Each stylesheet has a set of properties, which can be set by various
  -		means, usually either via an attribute on xsl:stylesheet, or via a top-level
  -		xsl instruction (for instance, xsl:attribute-set). The get methods for these
  -		properties only access the declaration within the given <CODE><FONT face="courier, monospaced">Stylesheet</FONT></CODE>
  -		object, and never takes into account included or imported stylesheets. The
  -		<CODE><FONT face="courier, monospaced">StylesheetComposed</FONT></CODE> derivative object, if it is a root
  -		<CODE><FONT face="courier, monospaced">Stylesheet</FONT></CODE> or imported <CODE><FONT face="courier, monospaced">Stylesheet</FONT></CODE>, has &quot;composed&quot;
  -		getter methods that do take into account imported and included stylesheets, for
  -		some of these properties. The table of Stylesheet properties, with composed
  -		methods, is as follows. Note that the names of the attributes are according to
  -		a formula for translating the xsl names to the Java get/set method names.</P> 
  -	 <TABLE border="0" cellpadding="2" cellspacing="2" width="100%"> 
  -		<TR> 
  -		  <TD align="center" bgcolor="#039acc" colspan="1" rowspan="1" valign="center"><FONT color="#ffffff" face="arial,helvetica,sanserif" size="-1"><B>Property</B>&nbsp;
  -      </FONT></TD> 
  -		  <TD align="center" bgcolor="#039acc" colspan="1" rowspan="1" valign="center"><FONT color="#ffffff" face="arial,helvetica,sanserif" size="-1"><B>Type</B>&nbsp;
  -      </FONT></TD> 
  -		  <TD align="center" bgcolor="#039acc" colspan="1" rowspan="1" valign="center"><FONT color="#ffffff" face="arial,helvetica,sanserif" size="-1"><B>XSL Origin</B>&nbsp;
  -      </FONT></TD> 
  -		  <TD align="center" bgcolor="#039acc" colspan="1" rowspan="1" valign="center"><FONT color="#ffffff" face="arial,helvetica,sanserif" size="-1"><B>Composed Methods</B>&nbsp;
  -      </FONT></TD> 
  -		  <TD align="center" bgcolor="#039acc" colspan="1" rowspan="1" valign="center"><FONT color="#ffffff" face="arial,helvetica,sanserif" size="-1"><B>Note</B>&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">XmlnsXsl&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">String&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">xmlns:xsl&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">(none, applies to stylesheet only)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">ExtensionElementPrefixes&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StringVector&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#extension-element">extension-element-prefixes</A></FONT></CODE>
  -			 attribute&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">(none, applies to stylesheet only)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">ExcludeResultPrefixes&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StringVector&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#literal-result-element">exclude-result-prefixes
  -			 or xsl:exclude-result-prefixes</A></FONT></CODE> attributes&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">(not sure about this... only from root?)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">I think this should be a root method, and a single list should be
  -			 made, like with xsl:output.&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Id&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">String&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">The <CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#section-Embedding-Stylesheets">id</A></FONT></CODE>
  -			 attribute&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">(none, applies to stylesheet only)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Version&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">String&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">The <CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#forwards">version</A></FONT></CODE> attribute&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">(none, applies to stylesheet only)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">XmlSpace&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">boolean&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#strip">xml:space</A></FONT></CODE> attribute&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">(none, applies to stylesheet only)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Import&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of StylesheetComposed objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#import">xsl:import</A></FONT></CODE> element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getImportComposed(int i) / getImportCountComposed()&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Composed list contains all imported sheets, not the importing sheet
  -			 itself.&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Include&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of Stylesheet objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#include">xsl:include</A></FONT></CODE> element&nbsp;
  -      </FONT></TD>
  -		  
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getIncludeComposed(int i) / getIncludeCountComposed()&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Composed list contains all directly or indirectly included
  -			 stylesheets.&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">DecimalFormat&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Stack (list of DecimalFormatProperties objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#format-number">xsl:decimal-format</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getDecimalFormatComposed(QName name)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StripSpaces&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Stack (list of XPath match pattern objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#strip">xsl:strip-space</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getWhiteSpaceInfo(TransformerImpl transformContext, Node
  -			 sourceTree, Element targetElement)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">PreserveSpaces&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Stack (list of XPath match pattern objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#strip">xsl:preserve-space</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getWhiteSpaceInfo(TransformerImpl transformContext, Node
  -			 sourceTree, Element targetElement)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Output&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">OutputFormatExtended&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#output">xsl:output</A></FONT></CODE> element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getOutputComposed() on StylesheetRoot only&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Key&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of KeyDeclaration objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#key">xsl:key</A></FONT></CODE> element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getKeysComposed()&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">AttributeSet&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of ElemAttributeSet objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#attribute-sets">xsl:attribute-set</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">On StylesheetRoot only?&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Variable&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of ElemVariable objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#top-level-variables">xsl:variable</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Param&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of ElemParam objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#top-level-variables">xsl:param</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Template&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of ElemTemplate objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#section-Defining-Template-Rules">xsl:template</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">getTemplateComposed(TransformerImpl transformContext, Node
  -			 sourceTree, Node targetNode, QName mode) and getTemplateComposed(QName
  -			 qname)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">NamespaceAlias&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Vector (list of ElemTemplate objects)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1"><CODE><FONT face="courier, monospaced"><A href="http://www.w3.org/TR/xslt#literal-result-element">xsl:namespace-alias</A></FONT></CODE>
  -			 element&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">On StylesheetRoot only?&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">NonXslTopLevel&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Hashtable (table of opaque objects keyed by QName)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Any top-level non-xslt element.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">none.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Href&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">URL&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">The location of the stylesheet, possibly set by xsl:include or
  -			 xsl:import.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">none.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StylesheetRoot&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StylesheetRoot&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">The root of the stylesheet tree, for quick access.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">none.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StylesheetParent&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Stylesheet&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">The importing or including stylesheet.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">none.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StylesheetComposed&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">StylesheetComposed&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">The closest importing stylesheet.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">none.&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -		<TR> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">NamespaceDecls&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">Linked list of NameSpace elements&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">xmlns:foo attribute map&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">(none, applies to stylesheet only)&nbsp;
  -      </FONT></TD> 
  -		  <TD align="left" bgcolor="#a0ddf0" colspan="1" rowspan="1" valign="top"><FONT color="#000000" face="arial,helvetica,sanserif" size="-1">&nbsp;
  -      </FONT></TD> 
  -		</TR> 
  -	 </TABLE> 
  -  <A name="transformer"><!--anchor--></A> 
  -  <H2>Transformer Module</H2> 
  -	 <P></P> 
  -	 <P>The <A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/transformer/package-summary.html">Transformer</A> module is in charge of run-time transformations.  The <A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/transformer/TransformerImpl.html">TransformerImpl</A> object, which implements the TrAX <A href="http://trax.openxml.org/javadoc/trax/Transformer.html">Transformer</A> interface, and has an association with a <A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/templates/StylesheetRoot.html">StylesheetRoot</A> object, begins the processing of the source tree (or provides a <A href="http://www.megginson.com/SAX/Java/javadoc/org/xml/sax/ContentHandler.html">ContentHandler</A> reference), and performs the transformation.  The Transformer package does as much of the transformation as it can, but element level operations are generally performed in the <A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/templates/ElemTemplateElement.html#execute(org.apache.xalan.transformer.TransformerImpl, org.w3c.dom.Node, org.apache.xalan.utils.QName)">ElemTemplateElement.execute(...)</A> methods.</P><P>Result Tree events are fed into a <A href="http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/transformer/ResultTreeHandler.html">ResultTreeHandler</A> object, which acts as a layer between the direct calls to the result 
  -tree content handler (often a Serializer), and the Transformer.  For one thing, 
  - we have to delay the call to
  - startElement(name, atts) because of the
  - xsl:attribute and xsl:copy calls.  In other words,
  - the attributes have to be fully collected before you
  - can call startElement.</P><P>Other important classes in this package are:</P><DL><DT>CountersTable and Counter</DT><DD>The Counter class does incremental counting for support of xsl:number.
  - This class stores a cache of counted nodes (m_countNodes). 
  -  It tries to cache the counted nodes in document order... 
  - the node count is based on its position in the cache list.  The CountersTable class is a table of counters, keyed by ElemNumber objects, each 
  - of which has a list of Counter objects.</DD></DL><DL><DT>KeyIterator, KeyManager, and KeyTable</DT><DD>These classes handle mapping of keys declared with the xsl:key element.</DD></DL><DL><DT>TransformState</DT><DD>This interface is meant to be used by a consumer of SAX2 events produced by Xalan, and enables the consumer 
  - to get information about the state of the transform.  It 
  - is primarily intended as a tooling interface.</DD></DL><P>Even though the following modules are defined in the org.apache.xalan package, instead of the transformer package, they are defined in this section as they are mostly related to runtime transformation.</P><A name="stree"><!--anchor--></A>
  -  <H3>Stree Module</H3><P></P><P>The Stree module implements the default <A href="http://www.w3.org/TR/xpath#data-model">Source Tree </A> for Xalan, that is to be transformed.  It implements read-only <A href="http://www.w3.org/TR/DOM-Level-2/">DOM2</A> interfaces, and provides some information needed for fast transforms, such as document order indexes.  It also attempts to allow a streaming transform by launching the transform on a secondary thread as soon as the SAX2 <A href="http://www.megginson.com/SAX/Java/javadoc/org/xml/sax/ContentHandler.html#startDocument()">StartDocument</A> event has occurred.  When the transform requests a node, and node is not present, the getFirstChild and GetNextSibling methods will wait until the child node has arrived, or an <A href="http://www.megginson.com/SAX/Java/javadoc/org/xml/sax/ContentHandler.html#endElement(java.lang.String,%20java.lang.String,%20java.lang.String)">endElement</A> event has occurred.</P><P>Note that the secondary thread is an issue.  It would be better to do the same thing as described above on a single thread, but using the parser in 'pull' mode, or simply with a parseNext method so the parse would occur in blocks.</P><P>This kind of streaming is not perfect because it still requires an entire source tree to be concretely built.  There have been a lot of good discussions on the xalan-dev list about how to do static analysis of a stylesheet, and be able to allocate only the nodes needed by the transform, while they are needed (or not allocate source objects at all).</P><P>Vincent-Olivier Arsenault &lt;vincent@neuro6.com&gt; has proposed the following design:</P><P>By looking at the stylesheet you know how streamable it is (of course this
  -needs strict adherence to the xslt recommendation). since there's a root
  -template and no &lt;xsl:apply-templates/&gt; you can build your context list
  -containing only absolute xpath which means nodes get out of context
  -faster).</P>
  -
  -<P>The paths of the relevant nodes, for this stylesheet, are (ok this is an
  -example, so I may be missing some):</P>
  -<OL>
  -<LI>path: &quot;/address&quot; context: &quot;address&quot; (at &lt;/address&gt;, you get rid of the
  -whole &quot;person/address&quot; stuff);</LI>
  -
  -<LI>path: &quot;/adn&quot; context: &quot;adn&quot;;</LI>
  -
  -<LI>path: &quot;/medicalrecord&quot; context: &quot;/&quot; (for possibly repetitive nodes, the
  -context is always the parent node).</LI>
  -</OL>
  -<P>And all the rest goes to trash!!!!</P>
  -
  -<P>Let me refine:</P>
  -
  -<P>you analyze the whole stylesheet like that (would be good if optimization
  -and xpath list could be done simultaneously) and you end up with a list of
  -expanded paths mapped to all the templates.</P>
  -
  -<P>An entry in the list (i would call this list the transformation stack) would
  -consist of 4 things:</P>
  -<OL>
  -<LI>the relevance context xpath (on which the input nodes will be tested for
  -pertinence: do we keep it of not);</LI>
  -
  -<LI>the transformation rule to apply to the matching nodes (this can just be a
  -forwarder to another template transformation stack);</LI>
  -
  -<LI>a result buffer (in which the nodes that can't be streamed are temporarily
  -stored);</LI>
  -
  -<LI>the streaming context xpath (triggers streaming of the buffer to the
  -output).</LI>
  -</OL><A name="extensions"><!--anchor--></A>
  -<H3>Extensions Module</H3><P></P><P>This package contains an implementation of Xalan Extension Mechanism, which uses the <A href="http://oss.software.ibm.com/developerworks/opensource/bsf/">Bean Scripting Framework</A>.
  -
  -The Bean Scripting Framework (BSF) is an architecture for incorporating scripting into Java applications and applets.  Scripting languages such as Netscape Rhino (Javascript), VBScript, Perl, Tcl, Python, NetRexx and Rexx can be used to augment XSLT's functionality.  In addition, the Xalan extension mechanism allows use of Java classes.  See the <A href="http://xml.apache.org/xalan/extensions.html">Xalan-J 1 extension documentation</A> for a description of using extensions in a stylesheet. Please note that the W3C XSL Working Group is working on a specification for standard extension bindings, and this module will change to follow that specification.  </P><P>[More needed... -sb]</P><A name="xpath"><!--anchor--></A> 
  -  <H2>XPath Module</H2> 
  -	 <P></P> 
  -	 <P>This module is pulled out of the Xalan package, and put in the org.apache package, to emphasize that the intention is that this package can be used independently of the XSLT engine, even though it has dependencies on the Xalan utils module.</P><P><IMG src="images/org_apache.gif"></P> 
  -  <P>The XPath module first compiles the XPath strings into expression trees, and then executes these expressions via a call to the XPath execute(...) function.  </P>  <P>Major classes are:</P><DL><DT>XPath</DT><DD>Represents a compiled XPath.  Major function is <CODE><FONT face="courier, monospaced">XObject execute(XPathContext xctxt, Node contextNode, 
  -                         PrefixResolver namespaceContext).</FONT></CODE></DD></DL><DL><DT>XPathAPI</DT><DD>The methods in this class are convenience methods into the
  - low-level XPath API.</DD></DL><DL><DT>XPathContext</DT><DD>Used as the runtime execution context for XPath.</DD></DL><DL><DT>DOMHelper</DT><DD>Used as a helper for handling DOM issues.  May be subclassed to take advantage 
  -   of specific DOM implementations.</DD></DL><DL><DT>SourceTreeManager</DT><DD>bottlenecks all management of source trees.  The methods
  - in this class should allow easy garbage collection of source 
  - trees, and should centralize parsing for those source trees.</DD></DL><DL><DT>Expression</DT><DD>The base-class of all expression objects, allowing polymorphic behaviors.</DD></DL><P>The general architecture of the XPath module is divided into the compiler, and categories of expression objects.</P><P><IMG src="images/xpath.gif"></P><P>The most important module is the axes module.  This module implements the DOM2 <A href="http://www.w3.org/TR/DOM-Level-2/traversal.html#Iterator-overview">NodeIterator</A> interface, and is meant to allow XPath clients to either override the default behavior or to replace this behavior.</P><P>The LocPathIterator and UnionPathIterator classes implement the <A href="http://www.w3.org/TR/DOM-Level-2/java-binding.html#org.w3c.dom.traversal.NodeIterator">NodeIterator</A> interface, and polymorphically use AxesWalker derived objects to execute each step in the path.  The whole trick is to execute the LocationPath in depth-first document order so that nodes can be found without necessarily looking ahead or performing a breadth-first search.</P><A name="xpathdbconn"><!--anchor--></A><H3>XPath Database Connection</H3><P></P><P>An important part of the XPath design in both Xalan 1 and Xalan 2, is to enable database connections to be used as drivers directly to the XPath <A href="http://www.w3.org/TR/xpath#location-paths">LocationPath</A> handling.  This allows databases to be directly connected to the transform, and be able to take advantage of internal indexing and the like.  While in Xalan 1 this was done via the <A href="http://xml.apache.org/xalan/apidocs/org/apache/xalan/xpath/XLocator.html">XLocator</A> interface, in Xalan 2 this interface is no longer used, and has been replaced by the DOM2 <A href="http://www.w3.org/TR/DOM-Level-2/traversal.html#Iterator-overview">NodeIterator</A> interface.  An application or extension should be able to install their own NodeIterator for a given document.</P><P><IMG src="images/data.gif"></P><P>[More to do]</P><A name="utils"><!--anchor--></A> 
  -  <H2>Utils Package</H2> 
  -	 <P></P> 
  -  <P>This package contains general utilities for use by both the xalan and xpath packages.  It is the intention that many of these utility classes (or their equivalents) be eventually brought into the org.apache.xml package for general use.  The list of major utilities are as follows:</P><DL><DT>AttList</DT><DD>Wraps a DOM attribute list in a SAX Attributes.</DD></DL><DL><DT>BoolStack, IntStack, IntVector, etc.</DT><DD>Simple stacks and vectors  for primitive values.</DD></DL><DL><DT>DefaultErrorHandler</DT><DD>Implements SAX error handler for default reporting.</DD></DL><DL><DT>DOMBuilder</DT><DD>Takes SAX events (in addition to some extra events 
  - that SAX doesn't handle yet) and adds the result to a document 
  - or document fragment.</DD></DL><DL><DT>Heap</DT><DD>Classic heap implementation.</DD></DL><DL><DT>MutableAttrListImpl</DT><DD>Mutable version of AttributesImpl.</DD></DL><DL><DT>NameSpace</DT><DD>A representation of a namespace.</DD></DL><DL><DT>NodeVector</DT><DD>A very simple table that stores a list of Nodes.</DD></DL><DL><DT>ObjectPool</DT><DD>Used for reuse of objects.</DD></DL><DL><DT>PrefixResolver</DT><DD>The class that implements this interface can resolve prefixes 
  - to namespaces.</DD></DL><DL><DT>PrefixResolverDefault</DT><DD>This class implements a generic PrefixResolver for a DOM, that 
  - can be used to perform prefix-to-namespace lookup 
  - for an XPath.</DD></DL><DL><DT>QName</DT><DD>Class to represent a  qualified XML name.</DD></DL><DL><DT>StringToStringTable</DT><DD>A very simple lookup table that stores a list of strings for lookup.  Used when a hashtable is too much overhead.</DD></DL><DL><DT>SystemIDResolver</DT><DD>Able to take a SystemID string and try and turn it into a good absolute URL.</DD></DL><DL><DT>TreeWalker</DT><DD>Implements a Visitor design pattern, doing a pre-order walk of the DOM tree, calling a ContentHandler interface as it goes.  Used for DOM-to-SAX conversion.</DD></DL><DL><DT>Trie</DT><DD>A digital search trie for 7-bit ASCII text.</DD></DL><DL><DT>UnImplNode</DT><DD>To be subclassed by classes that wish to act as DOM nodes, without having to implement all the methods.  Widely used.</DD></DL><A name="other"><!--anchor--></A>
  -  <H2>Other Packages</H2> 
  -	 <P></P> 
  -	 <DL><DT>client</DT><DD>Implementation of Xalan Applet [should we keep this?].
  -
  -</DD></DL> 
  -		<DL><DT>dtm</DT><DD>Implementation of the Document Table Model (DTM) [Should we keep this?].</DD></DL> 
  -		<DL><DT>extensions</DT><DD>Implementation of Xalan Extension Mechanism, which uses the Bean Scripting Framework.</DD></DL> 
  -		<DL><DT>lib</DT><DD>Implementation of Xalan-specific extensions [I want to add lots more extensions to this package!].</DD></DL><DL><DT>res</DT><DD>Contains strings that require internationalization.</DD></DL><A name="coding"><!--anchor--></A> 
  -  <H2>Coding Conventions</H2> 
  -	 <P></P> 
  -	 <P>This section documents the coding conventions used in the Xalan
  -		source.</P> 
  -	 <OL> 
  -		<LI>Class files are arranged with constructors and possibly an init()
  -		  function first, public API methods second, package specific, protected, and
  -		  private methods following (arranged based on related functionality), member
  -		  variables with their getter/setter access methods last.</LI> 
  -		<LI>Non-static member variables are prefixed with &quot;m_&quot;.</LI> 
  -		<LI>static final member variables should always be upper case, without
  -		  the &quot;m_&quot; prefix. They need not have accessors.</LI> 
  -		<LI>Private member variables that are not accessed outside the class need
  -		  not have getter/setter methods declared.</LI> 
  -		<LI>Private member variables that are accessed outside the class should
  -		  have either package specific or public getter/setter methods declared. All
  -		  accessors should follow the bean design patterns.</LI> 
  -		<LI>Package-scoped member variables, public member variables, and
  -		  protected member variables should not be declared.</LI> 
  -	 </OL> 
  -  <A name="open"><!--anchor--></A> 
  -  <H2>Open Issues</H2> 
  -	 <P></P> 
  -	 <P>This section documents architectural and design issues that I still
  -		consider to be open or unsolved. (This list is ongoing, and will change over
  -		time... it's simply a place for me to note problems that are ongoing and need
  -		to be solved.)</P> 
  -	 <DL> 
  -		<DT>Space stripping</DT> 
  -		<DD>In Xalan 1.x, it is clear that space stripping was a major
  -		  performance issue. This needs to be solved in Xalan 2.0 by stripping the
  -		  space nodes as the document is being parsed. This is a major problem though for
  -		  DOM trees. This can be perhaps be solved by preprocessing the DOM tree and
  -		  creating a table of space-stripping parent elements, when the nodes can't be
  -		  pre-stripped.</DD> 
  -	 </DL> 
  -  
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