The former guidelines we had ended up scant and reported tiny but to provide a picture; having said that, persons employing schema now ought to adhere to the new guidelines that are way more descriptive. Just one new guideline is usually a no-brainer: "Picture URLs should be crawlable and indexable". https://collinqjyqf.blogzet.com/the-ultimate-guide-to-json-schema-custom-validation-message-46991414