# Notation reference

Two of the languages here are standards with defined meaning rather than styles: BPMN 2.0 and DMN 1.3\. Their symbols are not interchangeable, and a diagram that uses the wrong one says something the author did not intend.

These pages are the lookup: what each symbol means, and which connections are legal.

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## In this section

[BPMN notation referenceWhat every BPMN 2.0 symbol means: events, tasks, gateways, flows, pools, data and artifacts.](https://help.gocapable.com/diagrams/bpmn-notation-reference.html)[DMN notation referenceWhat the DMN 1.3 elements mean: decisions, input data, knowledge models, requirements and table structure.](https://help.gocapable.com/diagrams/dmn-notation-reference.html)

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_The notation is the meaning._