Abstract: A system for assembling and communicating variable-length data messages over a computer network is adapted to access a master set of predefined data structures and select for inclusion within an assembled message those predefined data structures within the master set meeting a predetermined set of inclusion criteria. A message is assembled to include a set of selected predefined structures and an index including a set of index references. Each index reference corresponds to a data structure within the message and is indicative of the content of the data structure to which it corresponds. An offset reference is associated with each index reference of a selected set of index references included in the index. An offset reference is indicative of the location within the assembled message of a predefined data structure corresponding to the index reference with which the offset references is associated.

Abstract: An apparatus is disclosed for the preparation of infusion grade water for use in the preparation of parenteral solutions. The apparatus is comprised of a two component system including a chemical purification unit and an endotoxin filter receiving assembly. Chemical purification of the water is achieved by treating the feed water [any potable water source] using a sequence of carbon adsorption, reverse osmosis, deionization, and membrane filtration. The chemically pure water from this system is used as a feed water to a low molecular weight cutoff membrane ultrafilter, which is an integral part of a presterilized manifold with receiving bags. The receiving bags may contain premeasured solutes in sterile nonpyrogenic powder form or in concentrated solution form to yield by dilution typical parenteral solutions ready for administration.