Basic HTML version of Foils prepared August 1 99

Foil 22 DTD - Entity Declaration

From Advanced XML and its applications CPS714 Computational Science Information Track -- July 7 99. by Lukasz Beca
Location of data
  • internal entities
  • <!ENTITY entityname "replacement text">
  • external entities: parsed and uparsed
  • <!ENTITY entityname SYSTEM "URI">
Parsed entities - external files that contain XML, can be inserted in the document
Unparsed entities - mostly binary files, can be used only as attribute values on elements with ENTITY attributes
<!ENTITY picture SYSTEM "mypicture.gif" NDATA gif>

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