XML (eXtensible Markup Languange)

-> When transferred between different systems
-> XML can be used on any systems

-> can be changed without affecting data presentation

-> Validates syntax using DTD and Schema

Not compulsory but good practice to put that line in all your XML documents.

<?xml version="1.0" encoding="UTF-8"?>
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^- XML Prolog Specifies -^

• XML version <--> Encoding used

<mail> is ROOT element
<to>, <from>, <subject>, <text> are CHILDREN elements

<mail>  
   <to>falcon</to>  
   <from>feast</from>  
   <subject>About XXE</subject>  
   <text>Teach about XXE</text>  
</mail>
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Attributes can be used

<text category = "message">You need to learn about XXE</text>
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^--- category is attribute name
^--- "message" is attribute value