Definition
An Application Programming Interface (API) is a defined interface specifying how one software system can request data or trigger functions in another (a structured contract of what requests are valid and what response to expect) enabling, for example, a CMMS to pull asset data from an ERP or push sensor readings from a control system. It is the connection point, distinct from system integration, which is the broader work of making systems function together.
Key facts
- A defined, structured contract for interaction (specific requests and expected responses) not an ad-hoc data exchange.
- Enables one system to use another's data or functions without needing direct access to its internal implementation.
- The connection points that system integration work is typically built around, but not the integration effort itself.
- API design (clarity, stability, documentation) directly determines how easily systems can be connected to it.
How does Application Programming Interface work in maintenance?
An API provides a defined, documented way for one software system to request specific data or trigger a specific function in another system (for example, a CMMS querying a spare-parts catalog for stock levels, or a sensor system pushing readings to a data historian) following a structured contract both systems agree to.
What does Application Programming Interface require?
An API is the specific connection point or contract that makes an exchange between two systems technically possible. System integration is the broader project of actually connecting multiple systems into a working combined workflow, which typically uses one or more APIs as its building blocks alongside configuration, data mapping, and testing.
FAQ
Frequently asked questions
How does an interface provide functions or data?
An Application Programming Interface (API) provides them through a defined, structured contract specifying what requests are valid and what response to expect, letting one software system use another's data or functions.
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