Data & schema semantics · Size & shape

x-field-extra-annotation

`x-field-extra-annotation` appears on schema objects and properties. Its value is a string. Used by 5 providers across 22 OpenAPI documents. Observed values include `@com.redis.om.spring.annotations.Indexed`, `@jakarta.validation.constraints.PastOrPresent`, `@com.fasterxml.jackson.annotation.JsonFormat(pattern = \"yyyy-MM-dd'T'HH:mm:ss\"`, `@jakarta.validation.constraints.NotBlank`. Consistent with size & shape — this is inferred from where the key appears and what it carries, not from any published definition.

Data & schema semantics derived description
How this description was produced. It is assembled from what was measured in the corpus — where this key appears in a document, what shape its value takes, the values observed, and how many providers use it. It is not taken from a published definition, because for most extensions none exists. Read it as evidence, not as a specification. If you own this extension and want it described properly, tell us.
202 occurrences
22 documents
5 providers
purpose-named

Where it appears

Location in the documentOccurrences
schema 162
tag 2
operation 38

What its value looks like

Value shapeOccurrences
string202

Observed values

Sampled from the specifications, most frequent first.

@com.redis.om.spring.annotations.Indexed@jakarta.validation.constraints.PastOrPresent@com.fasterxml.jackson.annotation.JsonFormat(pattern = \"yyyy-MM-dd'T'HH:mm:ss\"@jakarta.validation.constraints.NotBlank@com.redis.om.spring.annotations.Searchable@lombok.ToString.Exclude@Valid@org.springframework.data.annotation.Id

Providers publishing it

All 5.

cosmo-techfundriselean-technologiesleaplightspeed-pos

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.