XML-LANG: DTDs (1/2)

• Element Declarations - name and content model

  • <!ELEMENT email (from, to+, cc*, subject, body, sig?) ><!ELEMENT body (#PCDATA | image)* ><!ELEMENT image EMPTY >
  • <!ELEMENT node (desc, node*)><!ELEMENT desc (#PCDATA)>

• Attribute Declarations - which elements may have what attributes, default and possible values

  • <!ATTLIST joke name ID #required label CDATA #implied status ( funny | notfunny ) ‘funny’ >

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