ARD Mediathek fields in every export
Programme records carry the title, series and episode identifiers, description, genre, duration, the producing broadcaster, first broadcast date, availability window and the address.
Producing broadcaster is a first class field. It is the federation's defining structure and it is what allows questions about regional commissioning, regional content share and how the institutions differ from each other.
Availability window is recorded with its expiry, because German public broadcasting operates time limits on how long material stays online and those limits are part of what the catalogue is.
Discovery source is recorded per row - which sitemap an address came from - so coverage can be audited rather than assumed complete.
Every row carries the collection timestamp, which is what makes an expiry date interpretable.