Update docs to refer to the JSON Schema spec for allowed types/formats

http://json-schema.org/latest/json-schema-validation.html#rfc.section.7.3

## What are the schemas that are affected by the issue

None

## What are examples of products that are impacted by the issue

None

Start by reading the linked JSON Schema validation specification and locating the documentation that describes allowed types and formats. Update those references so they point to the specification, then verify that the affected documentation consistently refers readers to the linked rules; no specific files or tests are named in the issue.

Written by the indexing model from the issue text.