XML
Structure
Validation
Demo

XML = eXtensible Markup Language
In XML we use tags ＜＞ or marks and you can use your own tags i.e. tags are not limited and not predefined,
it can be extended

XML is used to store and transport data
XML is a W3C Recommendation a software and hardware-independent way of storing, transporting, and sharing data
both human and machine-readable

XML Validation
Syntax | Structure check XML is well-formed (satisfy all the basic syntax condition) behaves according to predefined DTD or XML schema

DTD - Document Type Definition
XSD - XML Schema Definition

Wikipedia: (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable

#xml #developer #programming