---
id: CFG-7
family: GR-CFG
level: core
profiles: [storage-api]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-cfg/cfg-7
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# CFG-7 — An explicit null at a higher priority wins

*GR-CFG (Part I) · level: core · profiles: storage-api · added in 1.0*

Sending null is a decision, not a silence. A node that emits null on a wire has said something, and what it said beats whatever the author saved.

## The rule

> **Normative.** This is the rule.
>
> 1. At every priority, a value counts as supplied when a key of the parameter's name is present, whatever that key's value.
>
> 2. An explicit null therefore wins over any lower priority: a null delivered on a wire beats the author's saved config, and a null in the saved config beats the schema default.
>
> 3. This holds identically however a workflow is executed.

## Related rules

- Names: CFG-4, CFG-5, CFG-6
- Referenced by: CFG-3, CFG-4, CFG-5, DATA-7

---

Rule identifiers are permanent and are never renumbered. This specification carries
no implementation status: each implementation publishes its own standing against
these rules. Licensed CC BY 4.0.