---
id: CMP-4
family: RT-CMP
level: core
profiles: [runtime]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/rt-cmp/cmp-4
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# CMP-4 — An edge's type is derived, never declared

*RT-CMP (Part II) · level: core · profiles: runtime · added in 1.0*

## The rule

> **Normative.** This is the rule.
>
> 1. The type of an edge is derived from the handles it connects.
>
> 2. An edge does not declare its own type, and a declared type on an edge is not authoritative.

## Related rules

- Names: EDGE-5

---

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.