XML documents form a tree structure that starts at "the root"
and branches to "the leaves". XML documents use a self-
describing and simple syntax: The first line is the XML
declaration. It defines the XML version (1.0) and the encoding
used (ISO-8859-1 = Latin-1/West European character set). The
next line describes the root element of the document (like
saying: "this document is a note"): The next 4 lines describe 4
child elements of the root (to, from, heading, and body): And
finally the last line defines the end of the root element: You
can assume, from this example, that the XML document contains a
note to Tove from Jani. Don't you agree that XML is pretty self-
descriptive? XML documents must contain a root element. This
element is "the parent" of all other elements. The elements in
an XML document form a document tree. The tree starts at the
root and branches to the lowest level of the tree. All elements
can have sub elements (child elements): The terms parent, child,
and sibling are used to describe the