---
id: LANG-19
family: GR-LANG
level: extended
profiles: [runtime]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-lang/lang-19
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# LANG-19 — Extracting all matches for a property path always yields a list

*GR-LANG (Part I) · level: extended · profiles: runtime · added in 1.0*

## The rule

> **Normative.** This is the rule.
>
> Extracting all matches for a property path yields a list: a single result is wrapped in a one-element list, and a null result or no match yields the empty list.

---

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.