x-portone-description
`x-portone-description` appears on operations and on schema objects and properties. Its value is a string. Used by a single provider across 1 OpenAPI document. It sits in the `x-portone-` namespace, so its meaning is defined by portone tooling rather than by OpenAPI. Observed values include `테스트 모드 여부를 결정합니다. true 이면 테스트 모드로 실행됩니다. Request Body에도 isForTest가 있을 수 있으나, 둘 다`, `날짜를 나타내는 문자열로, `yyyy-MM-dd` 형식을 따릅니다.`, `true 이면 테스트 모드로 실행되며, false 이거나 주어지지 않은 경우 테스트 모드를 사용하지 않습니다.`, `query 파라미터로 전달된 문서번호 유형. 기본 값은 TAX_INVOICE_ID이며 SUPPLIER, RECIPIENT, TAX_INVOICE`. Consistent with data & schema semantics — this is inferred from where the key appears and what it carries, not from any published definition.
Where it appears
| Location in the document | Occurrences | |
|---|---|---|
| operation | 272 | |
| response | 69 | |
| schema | 115 |
What its value looks like
| Value shape | Occurrences |
|---|---|
| string | 456 |
Observed values
Sampled from the specifications, most frequent first.
Providers publishing it
All 1.
Why this is not in OpenAPI
Extensions exist because a provider needed something the specification would not carry. Most of what they hold is not the API contract at all — it is operational metadata about the contract: documentation, lifecycle, policy, provenance, and now agents. That metadata is usually better placed alongside the contract, in an Overlay or an APIs.json index, than crammed inside it. See everything else doing the data & schema semantics job.