HEALTH CARE DATA INTERCHANGE STANDARDS

Health Care Data Interchange Standards

Health Level Seven

standard to support health data interchange between heterogeneous systems

unsolicited update and query transactions in a client/server configuration

allows for batch updates

specifications for logical content (abstract message) and message encoding

sits on Application Level

Abstract Message Specifications

defines messages and responses

defines the data fields within messages

name

semantic description

attributes (length, type, optionality, repeating)

defines treatment of application errors

specific for each message type within an application

Data Encoding

basic message structure

Message header segment

Transaction header segment

Detail segments

structure of message

messages have segments

segments have data fields

data fields have components

components may have sub-components

data fields, components and sub-components may have repeating values

encoding is positional

encoding uses separators for each type of element

CORBA – Common Object Broker Architecture

construct a client/server model based on object-oriented technology

encapsulates legacy modules in objects

create new objects

permit staged development of new software

provide standards for object interfaces

support for multiple inheritance

support dynamic and static linking

provide a distributed repository that permits objects to register themselves and describe their own interfaces

provide a bus for instantiating objects and communicating among objects – Object Request Broker

support communication among different ORBs

make the relative location of clients and objects irrelevant

CORBA components

ORB

Common Services

Common Facilities

Application Objects

PIDS – Patient Identification Service

LQS – Lexicon Query Services