All items of the collection have their own classification. (see below).
Screen 1: Enter in the search field a classification item or any other search term.
e.g. the name of an author, editor, a donor, or any (part) of an object name. Or
choose: book, object, poster, review, cd-rom, picture, advertising, ...
Screen2 : returns a list of all found items. Click on a specific item; screen 3
returns the detail chard.