What is the use of XML schemas? - W3C

What is the use of XML schemas?

- XML schemas are used to represent the knowledge or the database in a pre-defined format and it doesn’t use the message format.

- XML schemas are used for web standard purpose and provide operational semantics that deals in orders and products related information.

- XML schemas don’t provide the reasoning for the transaction and it defines the type of product.

- Changes in XML schema makes the XML data invalid and the parsers reject the parsing of the schema that is being generated.

- XML schemas have the GRDDL transformation that transforms XML to RDF and provide the documentation to be validated according to the XML schema.