You may want to include entire rule sets within another rule set. You can do this with the <includes> tag. The <includes> tag has the following syntax:

  <ruleset src="{rule set name}"></ruleset>

Each <includes> tag has one or more child tags. Each child tag must be a <ruleset> tag, and each <ruleset> tag must use the src attribute to specify the Nucleus path of the rule set to include. See Including Rule Sets, Rules, and Sorting Directives

The <includes> tag must be matched by a closing </includes> tag.