XML and Related Technologies

Document Type Definitions (DTD) • 119

The keyword ATTLIST describes the attribute(s) for an element.

Figure 3.23 shows an XML document containing an inline DTD. We can see that the element contains

an attribute.

<?xml version =”1.0” ?>

<!DOCTYPE email [

<!ELEMENT email message) >

<!ELEMENT message #PCDATA)>

<!ATTLIST message from CDATA #REQUIRED>

<!ATTLIST message to CDATA #REQUIRED>

<!ATTLIST message subject CDATA #REQUIRED>

]>

<email>

<message from = “jui” to = “harshu” subject = “where are you?”>

It is time to have food!

</message>

</email>

Figure 3.23 Declaring attributes in a DTD

We can see that the message element has three attributes: ...