||A generic grammar for use in validating XML documents.
||All information specific to DTD grammars.
|| This interface describes basic attributes of XML grammars--their
physical location and their type.
||The intention of this interface is to provide a generic means
by which Grammar objects may be created without parsing instance
|| This interface specifies how the parser and the application
interact with respect to Grammar objects that the application
possesses--either by having precompiled them or by having stored them
from a previous validation of an instance document.
||All information specific to XML Schema grammars.
||Representing a schema grammar.