DTD Entities In XML

XML Entities
 
• Entity references are references to entities.
• Entities as variables used to define shortcuts to common text.
• Entities can be declared internal.
• Entities can be declared external
 
 
Declaring an Internal Entity
 
Syntax:
<!ENTITY entity-name “entity-value”>
 
DTD Example:
 
<!ENTITY developer “[email protected]”>
<!ENTITY copyright ” Copyright 2016 www.csitquestions.com. All Rights Reserved “>
 
XML example:
<author>&developer;©right;</author>
 
 
Declaring an External Entity
 
<!ENTITY entity-name SYSTEM “URI/URL”>
 
DTD Example:
<!ENTITY developer SYSTEM “http://www.csitquestions.com/html/xml/entity.xml”>
<!ENTITY copyright SYSTEM ” http://www.csitquestions.com/html/xml/entity.xml “>
 
XML example:
<author>&developer;©right;</author>
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