Entity Declarations

• Used extensively in large DTDs
• Provides the information to be included in place of an entity reference

  <!ENTITY chapter1 SYSTEM "http://www.mybook/chapter1.txt">
  <!ENTITY copyright "Copyright 1999 Bob Hopgood">

&chapter1; in a text will be replaced by the file chapter1.txt and &copyright; will be replaced by Copyright 1999 Bob Hopgood