<!-- $Id$ -->
<!-- Top level element -->
<!ELEMENT princList (list+)>
<!-- list corresponds to parts of the book -->
<!ELEMENT list (name,sublist+)>
<!ATTLIST list id ID #IMPLIED>
<!-- sublist corresponds to chapters of the book -->
<!ELEMENT sublist (name,package*)>
<!ATTLIST sublist id ID #IMPLIED>
<!-- information on package -->
<!ELEMENT package (name,((version,inst-version?,dependency*)|module+))>
<!ELEMENT name (#PCDATA)>
<!ELEMENT version (#PCDATA)>
<!ELEMENT inst-version (#PCDATA)>
<!-- Modules -->
<!ELEMENT module (name,version,inst-version?,dependency*)>
<!-- dependencies -->
<!ELEMENT dependency (dependency*)>
<!-- subdependencies of a dependency are defined for example in Perl
modules -->
<!ATTLIST dependency status (required|recommended|optional) "recommended"
name CDATA #REQUIRED
type (ref|link) "ref">
