XSD is a W3C recomedation that specifies how to describe the elements in XML document
XSD specifies data types, order and arity of elements in XML file.
Main components of XSD file are:
- Element declaration - declares properties of elements (names and namespaces)
- Attribute declarations - declares properties of attributes
- Simple and complex types:
- - XSD provides 19 simple data types
- - More complex types are declared using simple types and relationships