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- Overview
- ========
- The OpenTelemetry C++ API enables developers to instrument their
- applications and libraries in order to make them ready to create and
- emit telemetry data. The OpenTelemetry C++ API exclusively focuses on
- instrumentation and does not address concerns like exporting, sampling,
- and aggregating telemetry data. Those concerns are addressed by the
- OpenTelemetry C++ SDK. This architecture enables developers to
- instrument applications and libraries with the OpenTelemetry C++ API
- while being completely agnostic of how telemetry data is exported and
- processed.
- Library design
- --------------
- The OpenTelemetry C++ API is provided as a header-only library and
- supports all recent versions of the C++ standard, down to C++14.
- A single application might dynamically or statically link to different
- libraries that were compiled with different compilers, while several of
- the linked libraries are instrumented with OpenTelemetry. OpenTelemetry
- C++ supports those scenarios by providing a stable ABI. This is achieved
- by a careful API design, and most notably by providing ABI stable
- versions of classes from the standard library. All those classes are
- provided in the ``opentelemetry::nostd`` namespace.
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