PrismTech's OpenSplice DDS provides the most comprehensive implementation of the Object Management Group's (OMG) Data Distribution Service for Real-Time Systems (DDS) standard.
Standards
Data Centric Publish Subscribe (DCPS)
Data Centric Publish Subscribe (DCPS) profile utilizes the well-known publish/subscribe paradigm to implement highly efficient information-dissemination between multiple publishers and subscribers that share interest in so-called 'topics'.
Data Local Reconstruction Layer (DLRL)
Data Local Reconstruction Layer (DLRL) 'object caching' profile extends the DCPS profiles with an object-oriented view on a set of related topics thus providing typical OO-features such as navigation, inheritance and use of value-types.
DDS-Interoperability / Real-time Publish-Subscribe (RTPS) Wire Protocol
The RTPS Wire Protocol DDS Interoperability Wire Protocol Specification defines the interoperability protocol for DDS.

OMG Data Distribution Service for Real-Time Systems (DDS)
The OMG DDS service specifies a coherent set of profiles that target real-time information-availability for domains ranging from small-scale embedded control systems up to large-scale enterprise information management systems.