<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<!DOCTYPE organization2 [
    <!ELEMENT organization2 (company*,ids)>
    <!ELEMENT company (#PCDATA | department)*>
    <!ELEMENT ids (id*)>
    <!ELEMENT id EMPTY>
    <!ELEMENT department EMPTY>
    
    <!ATTLIST organization  id              ID  #IMPLIED
    >
    <!ATTLIST company   id                  ID  #REQUIRED
                        count               CDATA  #REQUIRED
    >
    <!ATTLIST department    id              ID  #REQUIRED
    >
    <!ATTLIST id
        value       IDREF   #REQUIRED
    >
]>
<organization2>
    <company id="xca" count="2">
        <department id="xda"/>
    </company>
    <company id="xcb" count="0"/>
    <company id="xcc" count="5"/>
    <ids>
        <id value="xca"/>
        <id value="xcb"/>
    </ids>
</organization2>