• Performance fixes and enhancements to address the degradation of performance between Xalan-Java version 2.3.1 and Xalan-Java 2.4.0.
• A prototype implementation of the DOM Level 3 XPath Specification. The implementation is considered 'experimental' at this time due to the status of the specification. See the new sample, ApplyXPathDOM for an example of how to use this API.
• Extension changes and enhancements:
• Implement canonical namespaces for all Xalan extensions. All extensions now use namespaces starting with http://xml.apache.org/xalan. The old namespaces are still supported for backward compatibility. See the updated extensions documentation for details.
• Added new EXSLT extension functions, including the EXSLT dynamic extension functions max, min, sum, map, evaluate and closure, the EXSLT strings extension functions align, concat, padding, split and tokenize, and some new extension functions in the math module.
• Reorganized the extension functions for new EXSLT extensions. The implementation of some extension functions (intersection, difference, distinct, evaluate and tokenize) are moved from the main Extensions class to the corresponding EXSLT modules.
• Enable the EXSLT extensions for XSLTC. The EXSLT common, math, sets, dates-and-times and strings modules can be used in XSLTC.
• Integration of the nodeset and redirect extension for XSLTC. You can now use Xalan namespaces for these extensions in XSLTC.
• Enhancement in Java extenion for XSLTC. Three namespace formats (Java, package and class) can all be used in XSLTC. More type conversion rules are added as well.
• Enable support for invoking transformations using the Xalan compiler (XSLTC) via the Xalan interpretive Process command line. Specifically, the -XSLTC option was added. The -TT, -TG, -TS, -TTC, -QC, -L, -INCREMENTAL, -NOOPTIMIZE and -RL option do not work in XSLTC mode. All other existing options can be used with -XSLTC. Additional options were added to enable XSLTC compile and transform modes: -XO, -XD, -XJ, -XP, -XN, -XX, -XT. See the Process usage statement for more information on these options.
• Fixed SQL Extension problem where a query that returned zero rows would incorrectly return a JDBC exception.
• Fixed a limitation for XPath expressions. The token queue and operations map can now grow to accomodate really large XPath expressions.
• Fixes for the following bugzilla defects: 4344, 5046, 6181, 6927, 7161, 7357, 8175, 8473, 8939, 9731, 9959, 10176, 10384, 10414, 10643, 11073, 11341, 11661, 11743, 11809, 12077, 12127, 12298, 12687, 13059, 13303, 13305, 13106, 13501, 13711, 13754, 13863, 13944, 14022
.
• Support for and bundling of Xerces Java 2.2.
• Support for and bundling of xml-apis.jar from the factoryfinder-build of the RIVERCOURT1 branch of xml-commons. This version of the Java APIs for XML Processing successfully passes the JAXP 1.1 and JAXP 1.2 TCKs.
• For a list of Xalan-Java commits, see xalan-cvs@xml.apache.org in the Apache mailing list archive index.
• Support building Xalan with JDK 1.4.

• Fixes for the following bugzilla defects: 3238, 4603, 5013, 5016, 5941, 6071, 6268, 6284, 6356, 6547, 6798, 6833, 6925, 6972, 7023, 7118, 7123, 7157, 7410, 7776, 8324, 8358, 8551, 8894, 9068, 9137, 9146, 9171, 9174, 9179, 9572, 9575, 9683, 9753, 10137, 10306, 10323, 10625, 10715, 10832, 10837, 10839, 10914, 10945, 11123, 11166, 11221, 11345, 11704, 11987, 11828, 12075
.
• Xalan-Java now uses a list of supported encodings in a properties file (org.apache.xalan.serialize.Encodings.properties). Fixes Bugzilla 6356. Patch from Sergey Ushakov.
• Support for the EXSLT function and result elements, and EXSLT date-and-time functions.
• Improvements to the extensions mechanism to more efficiently handle the detection and analysis of extensions during the stylesheet "composition" process, and the generation of the required extension handlers during initialization of the transformation process.
• Performance improvement. Instead of looping through the ExtendedType objects, use a hashtable and go directly to the correct object.
• Separation of source and messages. Messages have been moved into property files for easier localization.
• XSLTC version upgraded from 1.0 to 1.2.
• Support for and bundling of Xerces Java 2.1.
• Support for and bundling of xml-apis.jar from the RIVERCOURT1 branch of xml-commons. This version of the Java APIs for XML Processing successfully passes the JAXP 1.1 and JAXP 1.2 TCKs.
• For a list of Xalan-Java commits, see xalan-cvs@xml.apache.org in the Apache mailing list archive index.

• Xalan Java 2 is integrated with release 2 of Xerces-Java. Xalan-Java version 2.4.1 does not include support for the deprecated Xalan-Java 1 compatability API. The Xalan-Java 1 compatability code does NOT compile with Xerces-Java 2.
  
  
• The SQL extension samples continue to use InstantDB, but based on our realization of changes that have occurred in the licensing of InstantDB, we no longer include InstantDB and the associated sample database with our distibution. We do, however, provide information on how to set up InstantDB to support our SQL extension samples.
  
  
• Documentation updates: We have subdivided the release notes into multiple files to accelerate HTML document loading, and we have added a document on Transform features.
  
  
• If an attempt is made to coerce a different namespace onto a prefix already in use in xsl:attribute, the attribute will come out in the wrong namespace. Workaround: either provide an NCName instead of a QName for the attribute, or provide a QName with a prefix not used elsewhere.
  
  
• Handling xsl:namespace-alias declarations: In release 2.0.D01, we reported the need to do some research concerning exactly how Xalan should handle xsl:namespace-alias declarations. As a result of discussions among members of the W3C Working Group on XSL, we have reached a more precise consensus on how namespaces should be represented when an xsl:namespace-alias declaration is in effect.
  
  If a literal result element has a namespace prefix, the prefix will be preserved and the namespace URI of the element will be as specified in the xsl:namespace-alias element, but the result-prefix is not required to appear in the result. This also applies to the two other cases of "Literal namespace URI" mentioned in the XSLT Recommendation on Literal Result Elements. More simply, if the stylesheet calls for <axsl:foo> to be output as a literal result element, then it will be output as <axsl:foo> in the result, but the namespace associated with this "axsl" prefix will be as designated in the xsl:namespace-alias declaration.
  
  
• For HTML output, Xalan-Java 2 outputs character entity references (&copy; etc.) for the special characters designated in Appendix A. DTDs of the XHTML 1.0: The Extensible HyperText Markup Language. Xalan-Java 1.x, on the other hand, outputs literal characters for some of these special characters.
  
  
• In conformance with the XSLT Recommendation on the HTML Output Method and Section B.2.1 of the HTML 4.0 Recommendation, Xalan-Java 2 uses %hh encoding for each byte of the UTF-8 representation of non-ASCII characters in HTML URI attributes.
  
  
• When your stylesheet asks for an explicit carriage-return character (&#13;) to be inserted into the output, it is output during the serialization process in escaped form unless escaping has been disabled. When your stylesheet asks for an explicit line-feed character (&#10;) to be output, the system-default line-break character(s) is/are output during the serialization process. Also keep in mind that the XML parser normalizes line-breaks to line-feeds when it sends character events to the processor.
  
  
• If your XML input is a DOM, use the javax.xml.parsers.DocumentBuilderFactory setCoalescing() method to set coalescing to true (it is false by default), if you want to append CDATA sections to adjacent text sections to form a single text node (as the XPath standard calls for), and if the XML parser supports this feature (Xerces-Java 2.2.0 does not).
  
  
• When you traverse the namespace axis for a collection of element nodes, Xalan-Java includes one namespace node for each namespace in scope for one or more of the nodes in that collection. The XPath expression does not return additional (redundant) namespace nodes for each element for which the namespace nodes are in scope.
  
  
• See Bugzilla bug 2291 for a discussion of issues surrounding use of the default character encoding to read META-INF/Services.
  
  
• As Bugzilla bug 1800 reports, the Transformer does not get the setTransformState event until after the startDocument event. This could present a problem for tools developers, and we do intend to fix this bug.

All known Xalan-Java bugs are listed in Bugzilla (the Apache bug database). For a list of open bugs with links to each bug report, see XalanJ2 open bugs. If you find a new bug, please enter a XalanJ2 bug report in this database.

Before you can enter your first bug report, you must submit your email address to Bugzilla and receive a password.

We strongly encourage you write patches for problems you find and submit them to xalan-dev@xml.apache.org. We review the patches we receive to make sure they do not break something else, and (assuming they do not) include them in our next release. In the interest of fixing bugs, adding enhancements, and addressing outstanding design issues, we sincerely want (and need!) your active participation in the ongoing development of Xalan.

The Xalan-Java version 2.4.1 has been tested with Xerces-Java 2.2.0. The Xalan-Java version 2.4.1 download from xml.apache.org includes xercesImpl.jar from Xerces-Java 2.2.0 and xml-apis.jar. For version information about the contents of xml-apis.jar, see the JAR manifest. For information about including xercesImpl.jar and xml-apis.jar on the system class path, see Setting up the system class path.

Important You may experience unpredictable anomalies if your Xalan-Java and Xerces-Java builds are not in synch. If you download an update to Xalan-Java, check the release notes to determine which version of Xerces-Java you should use.

You can use Xalan-Java with other XML parsers that implement the Java API for XML Parsing 1.0. See Plugging in the Transformer and XML parser.

Apache Ant is a flexible, powerful, and easy-to-use Java build tool that we include with the Xalan-Java distribution. The Ant JAR file is in the bin directory, and the cross-platform XML build file (build.xml) is in the root directory along with a Windows32 batch file (build.bat) and a UNIX shell file (build.sh). The build file defines the "targets" that you can use Ant to build. The batch and shell files set up the classpath and launch Ant with the target (and any other arguments) you provide.

Instructions for using Ant

1. Set the JAVA_HOME environment variable to the JDK root directory.
   
   If you are using JDK 1.1.8, you must also put classes.zip in the JDK bin directory on the classpath. You can use Ant with JDK 1.1.8 to compile and jar the Xalan-Java source files, but you must have JDK 1.2.2 or higher to build the documentation.
   
   
2. Depending on your environment, run the batch file (build.bat) or shell file (build.sh) from the Xalan-Java root directory, optionally with arguments (see the table of targets below).
   
   The batch/shell file adds several JAR files to the classpath and launches Ant with any arguments you provide. If you provide no target, Ant compiles the source files and rebuilds xalan.jar (the "jar" target).

You can also set up your classpath manually (see build.bat or build.sh for the details), and then run Ant as follows:

java org.apache.tools.ant.Main target

where target is nothing (for the default target) or one of the following.

If you build a target that depends on other targets, Ant creates those other targets in the correct order.

The Xalan-Java build is in xalan.jar. The Xalan-Java source code tree is in the src directory.

If you are using Ant, the target is jar (the default). For more information, see Using Ant.

If you want to do the build without Ant, keep the following in mind:

• Set the classpath to include the src directory, xercesImpl.jar, bsf.jar, and bsfengines.jar.
• Use a Java compiler (such as the IBM Just-In-Time compiler or the Sun javac) to compile all the .java files in the src tree.
• Use the Sun jar utility to store the resulting .class files in xalan.jar

If you modify a sample and want to recompile it, you can run the Java compiler in the directory containing the example. Be sure xalan.jar, xml-apis.jar, and xercesImpl.jar are on the classpath. To recompile (and run!) the class files in the Servlet subdirectory, the javax.servlet and javax.servlet.http packages must also be on the classpath. Sun distributes these packages in the JSWDK 1.0.1 servlet.jar file.

After recompiling a sample, you can use the Sun jar utility to place your new .class files in xalansamples.jar.

You can use Ant with the samples target to recompile the samples and place the unpackaged class files in xalansamples.jar. For more information, see Using Ant.

To rebuild (and to run) the sample servlet, the javax.servlet and javax.servlet.http packages must be on your classpath.

Xalan-Java includes a number of XML source files, XSL stylesheets, document type definition (DTD) files, entity relationship (ENT) files, graphics, and a JavaScript file that provide the input for the Xalan HTML User's Guide, and the overview and package-level documents used during the generation of Javadoc.

To rebuild the documentation, you must use the StyleBook tool and the JDK 1.2.2 java and javadoc tools. StyleBook (which uses Xalan and Xerces) is in stylebook-1.0-b2.jar. Some of the document definition files, stylesheets, and resources are stored in xml-site-style.tar.gz, and are unzipped when you run Ant as described below.

You can use Ant with the docs target to regenerate the User's Guide and with the javadocs target to regenerate the Javadoc API documentation. For more information, see Using Ant.

If you want to rebuild the documentation without using Ant, keep the following in mind:

• Unzip xml-site-style.tar.gz into the xdocs directory (the operation places files in a number of subdirectories).
  
  
• Be sure stylebook-1.0-b2.jar, xalan2jdoc.jar, xalan.jar, bsf.jar, bsfengines.jar, and xercesImpl.jar are on the class path.
  
  
• To build doc in a build/docs subdirectory, run StyleBook from the xdocs directory as follows:
  
  java org.apache.stylebook.StyleBook "targetDirectory=../build/docs/" sources/xalanLocal.xml style
  
  
• To build the HTML source files that javadoc needs for the TrAX top-level and package-level documentation, add a build/docs/apdidocs/javax/xml/transform directory and run the Xalan command-line utility from the xdocs directory as follows (all one line):
  
  java org.apache.xalan.xslt.Process -in sources/trax/trax.xml -param package-root '../../../src/' -xsl style/stylesheets/spec.xsl -out build/docs/apidocs/javax/xml/transform/trax.html
  
  
• Before you run javadoc, make sure the following directory structure exists under the Xalan root directory: build/docs/apidocs.
  
  
• To build the API documentation, run the JDK 1.2.2 javadoc tool from the xdocs directory (all one line):
  
  javadoc -doclet xalanjdoc.Standard -docletpath ../bin/xalanjdoc.jar -private -overview ../src/javadocOverview.html -sourcepath ../src -group TrAX "javax.xml.transform*" -group Xalan_Core "org.apache.xalan.processor: org.apache.xalan.templates: org.apache.xalan.transformer" -group XPath "org.apache.xpath*" -group Utilities "org.apache.xml.utils*" -group Xalan_Other "org.apache.xalan.client: org.apache.xalan.dtm: org.apache.xalan.extensions:org.apache.xalan.res: org.apache.xalan.stree:org.apache.xalan.trace: org.apache.xalan.xslt" -group Xalan_Extensions "org.apache.xalan.lib*" -group Serializers "org.apache.xalan.serialize" org.apache.xalan.client org.apache.xalan.dtm org.apache.xalan.extensions org.apache.xalan.lib org.apache.xalan.lib.sql org.apache.xalan.processor org.apache.xalan.res org.apache.xalan.stree org.apache.xalan.templates org.apache.xalan.trace org.apache.xalan.transformer org.apache.xalan.xslt org.apache.xpath org.apache.xpath.axes org.apache.xpath.compiler org.apache.xpath.functions org.apache.xpath.objects org.apache.xpath.operations org.apache.xpath.patterns org.apache.xpath.res org.apache.xalan.serialize javax.xml.transform javax.xml.transform.dom javax.xml.transform.sax javax.xml.transform.stream javax.xml.parsers -d ../build/docs/apidocs -windowtitle "Xalan-Java 2" -doctitle "xslt4j; 2" -bottom "Copyright © 2000 Apache XML Project. All Rights Reserved."