•specifiedis trueif the attribute was given a value in the document; it
is
falseif the attribute has taken a default value from the DTD.
TIP
The W3C decided to call the attribute object Attrto avoid confusion with object proper-
ties. In some languages,object properties are called object attributes. An
Attribute
object would have been very confusing.
A Note on Structure
If you compare Listing 7.5 and Listing 7.6, it appears that the structure of
the two listings are different. The price listing has many elements and a
hierarchy that goes three levels deep. Attributes convey meta-information
(for example, information about the format of the data) ...
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