XML Unleashed

Working with Attributes

As you learned earlier in the chapter, attributes are used to specify additional information about an element. Within an element, attributes are used to form a name/value pair that somehow describes a particular property of the element. Attributes are declared in a DTD using attribute list declarations, which take the following form:

<!ATTLIST ElementName
						AttrName
						AttrType
						Default>

As you can see, an attribute has both a name (AttrName) and a type (AttrType), as well as a default value (Default). The default value for an attribute refers to either a value or a symbol that indicates the usage of the attribute. There are four different types of default values you can specify for an attribute in Default:

• #REQUIRED— The ...