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The Data Distribution Service (DDS) for real-time systems is an Object Management Group (OMG) machine-to-machine (sometimes called middleware or connectivity framework) standard that aims to enable dependable, high-performance, interoperable, real-time, scalable data exchanges using a publish–subscribe pattern.
Middleware services provide a more functional set of application programming interfaces to allow an application to: Locate transparently across the network, thus providing interaction with another service or application; Filter data to make them friendly usable or public via anonymization process for privacy protection (for example)
The Data Distribution Service (DDS) middleware does not use a broker in the middle. Instead, each publisher and subscriber in the pub/sub system shares meta-data about each other via IP multicast. The publisher and the subscribers cache this information locally and route messages based on the discovery of each other in the shared cognizance.
DDE—Dynamic Data Exchange; DDL—Data Definition Language; DDoS—Distributed Denial of Service; DDR—Double Data Rate; DEC—Digital Equipment Corporation; DES—Data Encryption Standard; dev—development; DFA—Deterministic Finite Automaton; DFD—Data Flow Diagram; DFS—Depth-First Search; DFS—Distributed File System; DGD—Dworkin's ...
Distributed Data Management Architecture (DDM) is IBM's open, published software architecture for creating, managing and accessing data on a remote computer. DDM was initially designed to support record-oriented files; it was extended to support hierarchical directories, stream-oriented files, queues, and system command processing; it was further extended to be the base of IBM's Distributed ...
Message-oriented middleware is in contrast to streaming-oriented middleware where data is communicated as a sequence of bytes with no explicit message boundaries. Note that streaming protocols are almost always built above protocols using discrete messages such as frames , datagrams , packets , cells , et al.
DATEV is a registered cooperative society (i.e. "eG") that is primarily a technical information services provider for tax accountants, auditors and attorneys. While it initially emerged as a data center service provider, it now provides software directly to end users (e.g. businesses) and consulting services for these occupations. The co ...
This section is about data exchange between hardware devices. In order for the devices to be able to read and exchange data, they would use a hardware-specific protocol (such as the radio signal) which is generated by a hardware device acting as a sending party (the radio tower), and can be interpreted by another hardware device which is the receiving party (your kitchen radio for instance).