---
id: R6.e
family: GR-VAL
level: core
profiles: [storage-api]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-val/r6-e
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# R6.e — A config value must be one of its enumerated values

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

## The rule

> **Normative.** This is the rule.
>
> 1. Where a config value's schema declares an `enum`, the value must be one of the listed values.
>
> 2. Comparison is exact and applies no type coercion, so the number `1` does not satisfy an `enum` listing the string `"1"`.
>
> 3. A value outside the list is refused with `R6_CONFIG_INVALID` at `node.{id}.config.{key}`.

## Related rules

- Names: R6.d
- Referenced by: R6.d

---

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.