This documentation describes which Attributes are required, proposed, or optional for structured knowledge with Unique intending to Google Lookup. Most Lookup structured facts makes use of schema.org vocabulary, but it is best to rely upon the Google Search Central documentation as definitive for Google Search behavior, rather than the schema. https://automatic-google-rich-sni47800.tinyblogging.com/5-easy-facts-about-json-schema-shopify-described-77821362