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

# EXPO-4 — A node nobody has touched stores no overrides

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

## The rule

> **Normative.** This is the rule.
>
> 1. A node instance on which no port has been shown or hidden stores no `ports` map at all.
>
> 2. Every one of its ports therefore resolves to its default exposure (EXPO-2), and adding a port to the node type later changes that node's canvas without the node being re-saved.

## Related rules

- Names: EXPO-2, EXPO-8
- Referenced by: EXPO-2, EXPO-8

---

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.