XML by Example

Attributes

Attributes also must be declared in the DTD. Element attributes are

declared with the ATTLIST declaration, for example:

<!ATTLIST tel preferred (true | false) “false”>

The various components in this declaration are the markup (<!ATTLIST), the

element name (tel), the attribute name (preferred), the attribute type

((true | false)), a default value (“false”), and the right angle bracket.

For elements that have more than one attribute, you can group the declara-

tions. For example, email has two attributes:

<!ATTLIST email href CDATA #REQUIRED

preferred (true | false) “false”>

Attribute declaration can appear anywhere in the DTD. For readability ...