-## Introduction
-
-In the ORTE project we are developing communication middleware under
-the OMG Data Distribution Service (DDS) for Real-Time Systems
-specification (OMG Document formal/07-01-01). The specification
-defines a service for efficiently distributing application data
-between participants in a distributed application.
-
-The recently-adopted DDS specification is divided into two components.
-First defines an Application Level Interface and behavior of a DDS
-that supports Data-Centric Publish-Subscribe (DCPS) in real-time
-systems. Second optional Data Local Reconstruction Layer (DLRL) allows
-distributed data to be shared by local objects located remotely from
-each other as if the data were local. The DLRL is built on top of the
-DCPS layer.
-
-The DDS specification also includes a platform specific mapping to IDL
-and therefore an application using DDS is able to switch among DDS
-implementations with only a re-compile. DDS therefore addresses
-'application portability.'
-
-The specification does not address the protocol used by the
-implementation to exchange messages over transports such as
-TCP/UDP/IP, so different implementations of DDS will not interoperate
-with each other unless vendor-specific “bridges” are provided.
-
-One of the transport protocol suitable for DDS communication is
-Real-Time Pusblish Subscribe (RTPS) wire protocol defined by OMG (OMG
-document formal/06-08-02). The RTPS was specifically developed to
-support the unique requirements of data-distributions systems. It's a
-field proven technology that is deployed in thousands of industrial
-devices.
-