# Installing the Discovery Framework on Tomcat 5.5

You can deploy the Discovery Framework as a standalone application on Tomcat 5.5.

These instructions assume that you have obtained the apache-tomcat-5.5.x.zip or tar.gz file from the Apache Foundation but that you have not yet installed it. The rest of these instructions will refer to the installation directory as apache-tomcat-5.5.x, leaving off the minor version number. Before following the steps here, consult the Liferay Portal Administrator's Guide, which contains portal deployment instructions and examples for Tomcat 5.5.

Note: The examples in this section are based on a Windows server Tomcat deployment. If you are installing on Linux, the steps will be similar, though you will need to substitute Linux binaries and paths. Where there is a significant difference, this is called out.
Note: Among the data sources in your Discovery Framework application, you must always include a default data source. This data source is automatically assigned to all data-source-backed components when they are initially added to a page. For details, see the topic "Specifying a default data source," located in the chapter "Discovery Framework data sources" in the Power User's Guide.