u<!ELEMENT Name Content-Spec>
uContent spec
EMPTY
ANY
Character data,
optionally interspersed with child elements
Child
elements
>Using a simple grammar governing the allowed types of
the child elements and the order in which they
may appear
uExamples
<!ELEMENT MEMO
(TO,FROM,SUBJECT,BODY,SIGN)>
<!ELEMENT BODY (P+)>