Document Type Definition

• External DTD

<?xml version=“1.0”?>

<!DOCTYPE greeting SYSTEM “hello.dtd”>

<greeting>Hello</greeting>

• Internal DTD

<?xml version=“1.0”?>

<!DOCTYPE greeting [

<!ELEMENT greeting (#PCDATA)>

]>

<greeting>Hello</greeting>

• Standalone Document Declaration section can be used to specify which DTD should be used

<xml version=“1.0” standalone=‘yes’ ?>

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