1 <!ELEMENT featureuids   (features,default)>

     2 <!ELEMENT features      (feature+)>

     3 <!ELEMENT feature       EMPTY>

     4 

     5 <!ATTLIST feature

     6         name            CDATA #REQUIRED

     7         uid             CDATA #REQUIRED

     8         installable     (true|false) #IMPLIED>

     9 

    10 <!ELEMENT default       (range+)>

    11 <!ELEMENT range         EMPTY>

    12 <!ATTLIST range

    13         min             CDATA #REQUIRED

    14         max             CDATA #REQUIRED

    15         support         (include|exclude) #REQUIRED>

    16