Jameda fields in every export
Practice records carry the practice name, doctor name as listed, specialty and subspecialties, full address, postcode, city, federal state, coordinates where published, telephone, website, opening hours by day, languages and insurance types accepted.
Opening hours are structured by day rather than kept as text, because hours as a string cannot drive an application and this is the single most common reason clients arrive having tried the collection themselves.
Geography is delivered ready to join: postcode parsed, state recorded, coordinates where available, so provision can be mapped against population without another cleaning pass.
Review data, where a client has a defensible reason for it, is a separate table with its own access decision - never merged into the practice row. Aggregate rating and review count can sit on the practice record as numbers without the text.
Every row carries the collection timestamp, which on a directory is what tells a downstream application whether an opening time can still be trusted.