<!ELEMENT featureuids   (features,default)>

<!ELEMENT features      (feature+)>

<!ELEMENT feature       EMPTY>

<!ATTLIST feature

        name            CDATA #REQUIRED

        uid             CDATA #REQUIRED

        installable     (true|false) #IMPLIED>

<!ELEMENT default       (range+)>

<!ELEMENT range         EMPTY>

<!ATTLIST range

        min             CDATA #REQUIRED

        max             CDATA #REQUIRED

        support         (include|exclude) #REQUIRED>