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Programming Languages for mis
and is stored on the computer with extension .xml. To present an instance document
in a meaningful form, a program, called style sheet, must be applied, as discussed later
in this chapter.
8.2.2 Declaration
e first line of an XML instance document is a processing instruction, enclosed
by pair <? and ?>. e first word xml after <? is the name of the instruction. In
this case, the first line of the document is XML declaration. A declaration statement
always starts at the first column without any space before it.
8.2.3 Tags and Element
XML uses tags to describe data. For example, <GREETING> is a start tag, and
</G