---
id: R6.h
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-h
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# R6.h — A pattern mismatch is refused, a broken pattern is not

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

A pattern the implementation cannot compile is a defect in the node type, not in the workflow, and the author who cannot fix it must not be blocked by it.

## The rule

> **Normative.** This is the rule.
>
> 1. A string config value that does not match its schema's `pattern` is refused with `R6_CONFIG_INVALID` at `node.{id}.config.{key}`.
>
> 2. Where the pattern itself is not a valid expression, the value is not refused: the workflow is accepted and no error is charged to the author.

## 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.