questiona i describe what an xml data island is


Question:

(a) (i) Describe what an XML Data Island is and outline the restrictions of using a Data Island.

(ii) The following XML file book.xml is used to keep track of a library?s books.

< ?xml version="1.0"?>
< LIBRARY>

< TITLE>Curtains
 < AUTHOR>Agatha Christie
< GENRE>Mystery
< BOOK>
< BOOK>
< TITLE>Harry Potter
< AUTHOR>JK Rowling
< GENRE>Children
< BOOK>
< /LIBRARY>

Write the HTML code to bind this XML data to an HTML document and to display it in a table.

(b) Explain the importance of Namespaces in XML, outlining your answer with an example.

(c) Outline the differences between an Internal Entity Declaration and an External Entity Declaration. Give an example of each type of entity declaration.

(d) Describe what a Simple Element is, illustrating your answer with sample codes.

(e) Describe, with an example for each, when data should be validated at:

(i) The client end
(ii) The server end

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