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Nuclos rule sets: business rule engine, server-side and client-side rules, event rules (create, update, status change), Nuclos API, rule manager.

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light bulb Rule sets

Business logic with the business rule engine: server- and client-side rules, events and the generic implementation.

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titleKonzept
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titleLow-code
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titleUpdated: Jul 2026
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titleapplies to Nuclos 4.2026.x

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The business rule engine

Nuclos has a business rule engine to implement any company-specific behaviour – wherever the other low-code mechanisms are not enough. Typical cases: complex validations, generating data for downstream systems, calling web services or changing data automatically depending on events.

Menu: Configuration → Rule sets

Three kinds of rules

Info
titleAPI & assignment

The available method calls are documented in the Nuclos API. Rules are assigned in the server rule manager or directly on a status transition.

Events

Server rules react to events such as create, update, delete, status change, print, job, object generation and more – each also in the final variant. All events (with examples) are documented in the German space for now.

Related pages

puzzle piece Business object


Where rules apply.

Open →

gear Status model


Rules on transitions.

Open →

package Object generator


Rules on generation.

Open →