Glossary Updates12 new terms added to the glossaries · October 2, 2026, 22:44 CEST
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Glossary · Automation software engineering and architecture

Service-oriented architecture (SOA)

Also known as: SOA

German: Serviceorientierte Architektur (SOA)

In software architecture, a service-oriented architecture (SOA) is a style in which functionality is provided as reusable services with published interfaces that other applications access over a network, often through shared middleware.

  • Software engineering

In one sentence

A service-oriented architecture (SOA) provides functionality as reusable network services with published interfaces.

Example

In the plant, quality, maintenance and order services are offered through a service bus, and the MES and the HMI use the same services.

How it applies

  • Engineering: SOA structures systems around business capabilities and their interfaces. In automation, OPC UA and device profiles for web services brought service orientation down to machine level.
  • Integration: Services must be governed: interface versions, ownership and dependencies. Without governance, services become tightly coupled despite the architecture.
  • Documentation: Keep a service catalog with purpose, interface, owner and version for each service. System-level documentation should explain which services support which user functions.

SOA vs. microservices

Microservice architecture is a later refinement of service orientation with smaller services, independent deployment and decentralized data. Classic SOA often used central enterprise service buses and larger shared services.

By knowledge.aitechdoc.world · Published September 26, 2026 · Last reviewed

Source: AI TechDoc Knowledge editorial definition, based on software architecture practice

Definitions follow the cited standards and specifications. Where a source is a copyrighted publication, such as an ISO, IEC or EN standard, the definition is a close paraphrase, not a verbatim quotation, so as not to infringe copyright. We recommend reading the original publication. The sections “How it applies” are editorial commentary by AI TechDoc Knowledge and are not part of any standard.

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