===== OMG: OPC-UA/DDS Gateway (DDS-OPCUA) =====
[[ddsf:public:guidebook:06_append:01_family_of_standards:start| return to the DDS Family of Standards ]]

<table>
<caption>Data sheet for OPC-UA/DDS Gateway (DDS-OPCUA)</caption>
| Title                      | OPC-UA/DDS Gateway  |
| Acronym                    | DDS-OPCUA |
| Version                    | 1.0  |
| OMG Document Number        | formal/20-01-01 |
| Release Date               | January 2020  |
| About Specification        | [[https://www.omg.org/spec/DDS-OPCUA/]] |
| Document                   | [[https://www.omg.org/spec/DDS-OPCUA/1.0/PDF]]|
</table>
  : **Note**: The following is an excerpt from the actual document. It is provided here as a convenience and is not authoritative. Refer to the original document as the authoritative reference.

==== Scope ====
  : //[[ddsf:public:guidebook:06_append:glossary:d:data_distribution_service_dds]] is a family of standards from the [[ddsf:public:guidebook:06_append:glossary:o:omg]] that provide
connectivity, [[ddsf:public:guidebook:06_append:glossary:i:interoperability|interoperability]], and [[ddsf:public:guidebook:06_append:glossary:p:portability|portability]] for Industrial Internet, cyber-physical, and mission-critical applications.//

  : //The DDS connectivity standards cover [[ddsf:public:guidebook:06_append:glossary:p:publish-subscribe|Publish-Subscribe]] (DDS), Service Invocation [[ddsf:public:guidebook:06_append:01_family_of_standards:03_ext:ddsrpc| (DDS-RPC)]], Interoperability
[[ddsf:public:guidebook:06_append:01_family_of_standards:01_core:ddsi_rtps| (DDS-RTPS)]], Information Modeling ([[ddsf:public:guidebook:06_append:01_family_of_standards:01_core:dds_extensible_types_dds-xtypes|DDS-XTYPES]]), Security [[ddsf:public:guidebook:06_append:01_family_of_standards:01_core:dds_security| (DDS-SECURITY)]], as well as programing APIs for C,
C++, Java and other languages.//

  : //The [[ddsf:public:guidebook:06_append:glossary:o:opc]] Unified Architecture (OPC-UA) is an information exchange standard for Industrial Automation and related
systems created by the OPC Foundation. The [[ddsf:public:guidebook:06_append:glossary:o:opc_ua]] standard provides an Addressing and Information Model for
Data Access, Alarms, and Service invocation layered over multiple transport-level protocols such as Binary [[ddsf:public:guidebook:06_append:glossary:t:tcp]] and
Web-Services.//

  : //DDS and OPC-UA exhibit significant deployment similarities://
    * //Both enable independently developed applications to interoperate even when those applications come from different vendors, use different [[ddsf:public:guidebook:06_append:glossary:p:programlang|programming languages]], or run on different platforms and operating systems.//
    * //Both have significant traction within Industrial Automation systems.//
    * //Both define standard protocols built on top of the [[ddsf:public:guidebook:06_append:glossary:t:tcp|TCP]]/[[ddsf:public:guidebook:06_append:glossary:u:udp|UDP]]/[[ddsf:public:guidebook:06_append:glossary:i:ip|IP]] Internet stacks.
The two technologies may coexist within the same application domains; however, while there are solutions that [[ddsf:public:guidebook:06_append:glossary:b:bootstrap|bridge]]
between DDS and OPC-UA, these are based on custom mappings and cannot be relied to work across vendors and
products.//

  ://This specification overcomes this situation by defining a standard, vendor-independent, configurable [[ddsf:public:guidebook:06_append:glossary:g:gateway|gateway]] that enables interoperability and information exchange between systems that use DDS and systems that use OPC-UA.//

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