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10. Discuss the private external declaration of DTD with example.

5 marks

Asked in 2072

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Official Answer

Private external DTDs are identified by the keyword SYSTEM, and are intended for use by a single author or group of authors.

<!DOCTYPE root_element SYSTEM "DTD_location">

where,

DTD_location: relative or absolute URL

E.g.

<?xml version="1.0"?>

<!DOCTYPE note SYSTEM "note.dtd">

<note>

<to>Tulsi</to>

<from>Girii</from>

<heading>Reminder</heading>

<body>Don't forget me this weekend!</body>

</note>

And this is the file "note.dtd" which contains the DTD:

<!ELEMENT note (to,from,heading,body)>

<!ELEMENT to (#PCDATA)>

<!ELEMENT from (#PCDATA)>

<!ELEMENT heading (#PCDATA)>

<!ELEMENT body (#PCDATA)>