<license>
<license> – specifying software license and optional reference to license text
Documenting release license
In package.xml 1.0, the license tag only contained the name of the license. In package.xml 2.0, there are two optional attributes, "uri" and "filesource". "uri" contains a uri that identifies the text of a license, such as "http://www.php.net/license/" for the PHP License. "filesource" can be used to specify a LICENSE file within an actual package that contains the text of the license.