JSON 架构草案 4 规范是否有架构？
Is there a schema for the JSON Schema draft 4 spec?
是否有描述 JSON Schema draft 4 规范的 JSON 架构？
IE。描述模式格式的模式。
是的。它是 $schema 属性 的 JSON 模式中的 referenced：
"$schema": "http://json-schema.org/draft-04/schema#"
The $schema keyword is both used as a JSON Schema version identifier and the location of a resource which is itself a JSON Schema, which describes any schema written for this particular version.
This keyword MUST be located at the root of a JSON Schema. The value of this keyword MUST be a URI [RFC3986] and a valid JSON Reference [json-reference]; this URI MUST be both absolute and normalized. The resource located at this URI MUST successfully describe itself. It is RECOMMENDED that schema authors include this keyword in their schemas.
是否有描述 JSON Schema draft 4 规范的 JSON 架构？ IE。描述模式格式的模式。
是的。它是 $schema 属性 的 JSON 模式中的 referenced：
"$schema": "http://json-schema.org/draft-04/schema#"
The
$schemakeyword is both used as a JSON Schema version identifier and the location of a resource which is itself a JSON Schema, which describes any schema written for this particular version.This keyword MUST be located at the root of a JSON Schema. The value of this keyword MUST be a URI [RFC3986] and a valid JSON Reference [json-reference]; this URI MUST be both absolute and normalized. The resource located at this URI MUST successfully describe itself. It is RECOMMENDED that schema authors include this keyword in their schemas.