A collection of schemas that webmasters can use to markup HTML pages in ways recognized by major search providers, and that can also be used for structured data interoperability (e.g. in JSON). This representation includes all layers, as presented in the experimental OWL file at https://schema.org/docs/schemaorg.owl. Versions containing -fixes in their names include the fixes described at https://github.com/schemaorg/schemaorg/issues/1611#issuecomment-299292010.