44. The system of claim 41 , wherein literal values from the metadata are compiled into said components in binary form, thereby eliminating runtime loading of metadata for reading the literal values.
41. A system for processing messages comprising: a computer having at least one processor and a memory; a graphical message designer, for receiving input from a user for characterizing logical structure and physical structure of a particular message type in serialized form; metadata, comprising markup language information generated from said design-time input, for characterizing the logical structure and physical structure of the particular message type in serialized form; and code generation modules for automatically generating de novo source code, based on the metadata, that compiles into custom message handling components that are highly optimized for runtime processing of the particular message type, so that a runtime environment may employ the components for processing messages of said particular message type in a highly optimized manner.