x-query, x-path, xml, ect

Q: Could you suggest a plan of action to study these subject?

XML seems to be prerequisite to the rest. What is the purpose of each title and the order they have to be studied?
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Mike EghtebasDatabase and Application DeveloperAsked:
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Geert BormansInformation ArchitectCommented:
First study XML:
XML is a way of data serialisation, document description that is machine processable, human readable and platform independent
XML is the data format in your architecture

XPath is an addressing mechanism for XML (though it has become more). It is a way to select portions of a document through a path syntax

XQuery is a way to search XML document(s). It heavily uses XPAth, that is why this is the order you need to learn things
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Geert BormansInformation ArchitectCommented:
If you want a good book to get started...

http://www.wrox.com/WileyCDA/WroxTitle/Beginning-XML-5th-Edition.productCd-1118162137.html

This book is surprisingly good (I use it in my XML classes)
and although it is a serious volume, it reads easily and is very comprehensive.
If I were to learn XML today, I would be pleased to have this book in my possession.
It covers all topics in the right order.

Make sure you get the latest edition
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Geert BormansInformation ArchitectCommented:
And beware for some of the online resources.
many people will point you to w3schools... well, it is a syntax-driven site it is NOT a learning resource
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Mike EghtebasDatabase and Application DeveloperAuthor Commented:
Thank you.
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Mike EghtebasDatabase and Application DeveloperAuthor Commented:
BTW, do you have some recommendations for xpath or xquery as well?
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Geert BormansInformation ArchitectCommented:
Welcome,
You will find that the XML book covers both XPath and XQuery as well

XML is just a language for expressing information, so it is useless if you don't have the tools to work with it. XPath and XQuery are such tools. That is why they are covered at length in an introductionary XML book
(XML without XPath is like relational database without SQL ;-)

Let me also recommend a tool for testing the examples in the book
www.oxygenxml.com is a very good programming environment for XML
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