properties

A content map of API-specific key-value pairs describing the targeted API entity. The map must be encoded as a JSON string, e.g., "{ \"description\": \"The API does ...\" }". Only OpenAPI-compliant documentation-related fields from the properties map are exported and, hence, published as part of the API entity definitions, while the original documentation parts are exported in a OpenAPI extension of x-amazon-apigateway-documentation.