---
id: SCH-4
family: GR-SCHEMA
level: core
profiles: [storage-api, editor-client]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-schema/sch-4
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# SCH-4 — A hidden parameter is dropped from everything

*GR-SCHEMA (Part I) · level: core · profiles: storage-api, editor-client · added in 1.0*

## The rule

> **Normative.** This is the rule.
>
> 1. A parameter marked hidden is dropped from both derived schemas and from the config defaults, overriding whatever the node type says about `connectable` and `configurable`.
>
> 2. Hiding does not suppress a reserved config-only parameter: one a node type has opted into still reaches the config schema.
>
> 3. Two spellings are honoured: `format: hidden`, which is the one to write, and a bare `hidden: true`, which is deprecated.
>
> 4. The deprecated spelling must not be dropped without a release that first warns on it, because dropping it silently un-hides the parameter, and a visible parameter becomes connectable and configurable.

## Related rules

- Names: SCH-5, SCH-19, SCH-31
- Referenced by: SCH-5, SCH-19

---

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.