| # Apache Tomcat 6.0 |

# Apache Tomcat 6.0 ## Additional Components |
Introduction
A number of additional third party components may be used with Apache Tomcat, but are not provided directly in the download bundle. These components may be built by users should they need them.
Building
The additional components are built using the `extras.xml` Ant script which is present in the source bundle of Tomcat. The build process is the following: Follow the build instructions to build a Tomcat binary from the source bundle (note: it will be used by the build process of the additional components, but does not need to be actually used later on) Execute the command `ant -f extras.xml` to run the build script The additional components JARs will be placed in the `output/extras` folder Refer to the documentation below about the usage of these JARs
Components list
> Full commons-logging implementation
> Tomcat uses a package renamed commons-logging API implementation which is hardcoded to use the java.util.logging API. The commons-logging additional component builds a full fledged package renames commons-logging implementation which can be used to replace the implementation provided with Tomcat. See the logging page for usage instructions.
> Web Services support (JSR 109)
> Tomcat provides factories for JSR 109 which may be used to resolve web services references. Place the generated catalina-ws.jar as well as jaxrpc.jar and wsdl4j.jar (or another implementation of JSR 109) in the Tomcat lib folder. Users should be aware that wsdl4j.jar is licenced under CPL 1.0 and not the Apache License version 2.0.
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