---
id: SCH-17
family: GR-SCHEMA
level: extended
profiles: [storage-api, editor-client]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-schema/sch-17
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# SCH-17 — The unified input port

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

## The rule

> **Normative.** This is the rule.
>
> 1. A unified `input` port is prepended to a node's ports where its node type exposes one.
>
> 2. It carries the `json` lane, and its description enumerates the node's connectable parameter keys only.

## Related rules

- Names: SCH-8, SCH-19
- Referenced by: SCH-8, 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.