Some of the properties of a file node are set automatically when it is uploaded to the Repository, such as author. This is handled by metadata extractors. A metadata extractor is set up to extract properties from a specific file MIME type. There are numerous metadata extractors available out-of-the-box covering common MIME types such as MS Office document types, PDFs, Emails, JPEGs, HTML files, DWG files and more. The metadata extractors are implemented via the Tika library, although custom metadata extractors are available. Each metadata extractor implementation has a mapping between the properties it can extract from the content file, and what content model properties that should be set as node metadata.