Knowledge Systems Laboratory, Stanford University
13
Example DTD: Memo
u<!ELEMENT MEMO    (TO,FROM,SUBJECT,BODY,SIGN)>
u<!ATTLIST MEMO    importance (HIGH|MEDIUM|LOW) "LOW">
u<!ELEMENT TO      (#PCDATA)>
u<!ELEMENT FROM    (#PCDATA)>
u<!ELEMENT SUBJECT (#PCDATA)>
u<!ELEMENT BODY    (P+)>
u<!ELEMENT P       (#PCDATA)>
u<!ELEMENT SIGN    (#PCDATA)>
u<!ATTLIST SIGN    signatureFile CDATA #IMPLIED
u                  email CDATA #REQUIRED>