relaxng.xml

<element xmlns="http://relaxng.org/ns/structure/1.0" name="ruleset" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <attribute name="name" />

  <optional>
    <attribute name="match_rule" />
  </optional>

  <optional>
    <attribute name="default_off" />
  </optional>

  <optional>
    <attribute name="platform">
      <data type="string">
        <param name="pattern">(firefox|chromium|cacert|ipsca|mixedcontent)( (firefox|chromium|cacert|ipsca|mixedcontent))*</param>
      </data>
    </attribute>
  </optional>

  <interleave>

    <zeroOrMore>
      <element name="test">
        <attribute name="url">
          <data type="string">
            <param name="pattern">http[^\\]+</param>
          </data>
        </attribute>
      </element>
    </zeroOrMore>

    <oneOrMore>
      <element name="target">
        <attribute name="host">
          <data type="string">
            <param name="pattern">(([A-Za-z0-9äö_-]+|\*)\.)*([A-Za-z0-9äö-]+|\*)</param>
          </data>
        </attribute>
      </element>
    </oneOrMore>

    <zeroOrMore>
      <element name="exclusion">
        <attribute name="pattern" />
      </element>
    </zeroOrMore>

    <zeroOrMore>
      <element name="securecookie">
        <attribute name="host"/>
          <data type="string">
            <param name="pattern">[^/]*</param>
          </data>
        <attribute name="name"/>
      </element>
    </zeroOrMore>

    <oneOrMore>
      <element name="rule">
        <attribute name="from">
          <data type="string">
            <!-- The from attribute of a rule must start with a caret.
                 It also must contain two slashes (separating the protocol from
                 the hostname), and at least one other slash (terminating the
                 hostname, and possible beginning a path). Alternatively it can be
                 the literal string "^http:". -->
            <param name="pattern">(\^.*//.*/.*|\^http:)</param>
          </data>
        </attribute>
        <attribute name="to">
          <data type="string">
            <!-- The to attribute of a rule must not contain spaces or
                 backslashes. It also must contain at least one slash after the
                 hostname. Alternatively it can be the literal string "https:"-->
            <param name="pattern">(https?://[^ \\]*/[^ \\]*|https:)</param>
          </data>
        </attribute>
        <optional>
            <attribute name="downgrade" />
        </optional>
      </element>
    </oneOrMore>

  </interleave>

</element>