<!ENTITY % classe
  "class      CDATA          #IMPLIED">

<!ELEMENT html (head, body)>
<!ATTLIST html
  lang    CDATA    #IMPLIED
>

<!ELEMENT head ((link*,meta*)*,title,(link*,meta*)*)>

<!ELEMENT title (#PCDATA)>

<!ELEMENT meta EMPTY>
<!ATTLIST meta
  http-equiv  CDATA          #IMPLIED
  name        CDATA          #IMPLIED
  content     CDATA          #REQUIRED
>

<!ELEMENT link EMPTY>
<!ATTLIST link
  rev         CDATA          #IMPLIED
  rel         CDATA          #IMPLIED
  type        CDATA          #IMPLIED
  href        CDATA          #IMPLIED
  title       CDATA          #IMPLIED
>

<!ELEMENT body (h1, p* )>
<!ATTLIST body
  %classe; 
>

<!ELEMENT h1 (#PCDATA)>
<!ATTLIST h1
  %classe; 
>

<!ELEMENT p (#PCDATA)>
<!ATTLIST p
  %classe; 
>