Schema Evolution publication categorizer

As XML schemas evolve over time or as applications are integrated,
it is sometimes necessary to validate an XML document known
to conform to one schema with respect to another schema. More generally,
XML documents known to conform to a schema may be modified,
and then, require validation with respect to another schema. Recently,
solutions have been proposed for incremental validation of XML documents.
These solutions assume that the initial schema to which a document
conforms and the final schema with which it must be validated