Update JSON Schema draft links to 2020-12 IETF pages

Signed-off-by: Mike Ralphson <mike.ralphson@gmail.com>

Author: MikeRalphson

versions/3.1.0.md

@@ -141,11 +141,11 @@ It is RECOMMENDED that the root OpenAPI document be named: `openapi.json` or `op
 
 ### <a name="dataTypes"></a>Data Types
 
-Data types in the OAS are based on the types supported by the [JSON Schema Specification Draft 2019-09](https://json-schema.org/draft/2019-09/json-schema-core.html#rfc.section.4.2).
+Data types in the OAS are based on the types supported by the [JSON Schema Specification Draft 2020-12](https://tools.ietf.org/html/draft-bhutton-json-schema-00#section-4.2.1).
 Note that `integer` as a type is also supported and is defined as a JSON number without a fraction or exponent part. 
-Models are defined using the [Schema Object](#schemaObject), which is a superset of JSON Schema Specification Draft 2019-09.
+Models are defined using the [Schema Object](#schemaObject), which is a superset of JSON Schema Specification Draft 2020-12.
 
-<a name="dataTypeFormat"></a>As defined by the [JSON Schema Validation vocabulary](https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.7.3), data types can have an optional modifier property: `format`.
+<a name="dataTypeFormat"></a>As defined by the [JSON Schema Validation vocabulary](https://tools.ietf.org/html/draft-bhutton-json-schema-validation-00#section-7.3), data types can have an optional modifier property: `format`.
 OAS defines additional formats to provide fine detail for primitive data types.
 
 The formats defined by the OAS are:
@@ -169,7 +169,7 @@ Unless specified otherwise, relative references are resolved using the URLs defi
 
 Relative references in [`Reference Objects`](#referenceObject), [`PathItem Object`](#pathItemObject) `$ref` fields and [`Example Object`](#exampleObject) `externalValue` fields are resolved using the referring document as the Base URI.
 
-Relative references in [`Schema Objects`](#schemaObject), including any that appear as `$id` values, use the nearest parent `$id` as a Base URI, as described by [JSON Schema Specification Draft 2020-12](https://tools.ietf.org/html/draft-bhutton-json-schema-00#section-8.2). If no parent schema contains an `$id`, then the Base URI is that of the referring document.
+Relative references in [`Schema Objects`](#schemaObject), including any that appear as `$id` values, use the nearest parent `$id` as a Base URI, as described by [JSON Schema Specification Draft 2020-12](https://tools.ietf.org/html/draft-bhutton-json-schema-00#section-8.2). If no parent schema contains an `$id`, then the Base URI is that of the referring resource.
 
 ### Schema
 
@@ -2299,16 +2299,16 @@ $ref: definitions.yaml#/Pet
 #### <a name="schemaObject"></a>Schema Object
 
 The Schema Object allows the definition of input and output data types.
-These types can be objects, but also primitives and arrays. This object is a superset of the [JSON Schema Specification Draft 2019-09](https://json-schema.org/specification-links.html#2019-09-formerly-known-as-draft-8).
+These types can be objects, but also primitives and arrays. This object is a superset of the [JSON Schema Specification Draft 2020-12](https://tools.ietf.org/html/draft-bhutton-json-schema-00).
 
-For more information about the properties, see [JSON Schema Core](https://json-schema.org/draft/2019-09/json-schema-core.html) and [JSON Schema Validation](https://json-schema.org/draft/2019-09/json-schema-validation.html).
+For more information about the properties, see [JSON Schema Core](https://tools.ietf.org/html/draft-bhutton-json-schema-00) and [JSON Schema Validation](https://tools.ietf.org/html/draft-bhutton-json-schema-validation-00).
 
 Unless stated otherwise, the property definitions follow those of JSON Schema and do not add any additional semantics.
 Where JSON Schema indicates that behavior is defined by the application (e.g. for annotations), OAS also defers the definition of semantics to the application consuming the OpenAPI document.
 
 ##### Properties
 
-The OpenAPI Schema Object [dialect](https://json-schema.org/draft/2019-09/json-schema-core.html#rfc.section.4.3.3) is defined as requiring the [OAS base vocabulary](#baseVocabulary), in addition to the vocabularies as specified in the JSON Schema draft 2019-09 [general purpose meta-schema](https://json-schema.org/draft/2019-09/json-schema-core.html#rfc.section.8).
+The OpenAPI Schema Object [dialect](https://tools.ietf.org/html/draft-bhutton-json-schema-00#section-4.3.3) is defined as requiring the [OAS base vocabulary](#baseVocabulary), in addition to the vocabularies as specified in the JSON Schema draft 2020-12 [general purpose meta-schema](https://tools.ietf.org/html/draft-bhutton-json-schema-00#section-8).
 
 The OpenAPI Schema Object dialect for this version of the specification is identified by the URI `https://spec.openapis.org/oas/3.1/dialect/base` (the <a name="dialectSchemaId"></a>"OAS dialect schema id").
 
@@ -2355,11 +2355,11 @@ The [XML Object](#xmlObject) contains additional information about the available
 
 It is important for tooling to be able to determine which dialect or meta-schema any given resource wishes to be processed with: JSON Schema Core, JSON Schema Validation, OpenAPI Schema dialect, or some custom meta-schema.
 
-The `$schema` keyword MAY be present in any root Schema Object, and if present MUST be used to determine which dialect should be used when processing the schema. This allows use of Schema Objects which comply with other drafts of JSON Schema than the default Draft 2019-09 support. Tooling MUST support the <a href="#dialectSchemaId">OAS dialect schema id</a>, and MAY support additional values of `$schema`.
+The `$schema` keyword MAY be present in any root Schema Object, and if present MUST be used to determine which dialect should be used when processing the schema. This allows use of Schema Objects which comply with other drafts of JSON Schema than the default Draft 2020-12 support. Tooling MUST support the <a href="#dialectSchemaId">OAS dialect schema id</a>, and MAY support additional values of `$schema`.
 
 To allow use of a different default `$schema` value for all Schema Objects contained within an OAS document, a `jsonSchemaDialect` value may be set within the <a href="#oasObject">OpenAPI Object</a>. If this default is not set, then the OAS dialact schema id MUST be used for these Schema Objects. The value of `$schema` within a Schema Object always overrides any default.
 
-When a Schema Object is referenced from an external resource which is not an OAS document (e.g. a bare JSON Schema resource), then the value of the `$schema` keyword for schemas within that resource MUST follow [JSON Schema rules](https://json-schema.org/draft/2019-09/json-schema-core.html#rfc.section.8.1.1).
+When a Schema Object is referenced from an external resource which is not an OAS document (e.g. a bare JSON Schema resource), then the value of the `$schema` keyword for schemas within that resource MUST follow [JSON Schema rules](https://tools.ietf.org/html/draft-bhutton-json-schema-00#section-8.1.1).
 
 ##### Schema Object Examples