Add `implicit-start` rule - Githubissues

bpmn-io / bpmnlint

Validate BPMN diagrams based on configurable lint rules.

MIT License

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Add `implicit-start` rule #121

Closed nikku closed 8 months ago

nikku commented 10 months ago

The rule should detect the following modeling patterns

Implicit starts (i.e. gateway or intermediate event without incoming flow)

How does the rule improve the BPMN diagram?

Implicit starts are considered a bad practice, as they make diagrams confusing, often times not matching the actual execution semantics:

Non experienced BPMN users may not understand token flow (yet) and assume that intermediate catch events "spawn" a token on catch
Elements left over as an oversight may cause unintended behavior during execution

Explicit modeling (cf. fake-join) encourages good practices, and creation of a little more verbose, albeit understandable, diagrams.

Rule Details

Name: implicit-start
Default notification level: error

What alternatives did you consider?

None.

nikku commented 8 months ago

Closed via https://github.com/bpmn-io/bpmnlint/pull/103.