Abb. 65: SGML Definitionen für Dublin Core Elemente (nach Weibel, Godby, Miller, Daniel 1996 [->])

...
<!ENTITY  % ObjectType.Scheme
          "NLM | Other">

<!ELEMENT ObjectType  - -  ANY >
<!ATTLIST ObjectType  Scheme (%ObjectType.Scheme;) #IMPLIED >

<!ENTITY  % Relationship.Scheme
          "URN | URL | LCCN | ISBN | ISSN | SICI | MessageID | FPI | Other" >

<!ENTITY  % Relationship.Type
          "Supersedes | Continues | Continued.From |
          Contained.In | Superseded.By | Cites | Extracted.From | 
          Is.Part.Of | Contains | IsIndexOf | IsIndexedBy | GlossaryOf |
          Predecessor | Successor | IsDerivativeOf | Child | Parent | 
          Sibling" >

<!ELEMENT Relation  - -  ANY >
<!ATTLIST Relation  Scheme   (%Relationship.Scheme;) #IMPLIED
                    Type     (%Relationship.Type;)   #IMPLIED >
...