BROWSE allows you to “select-and-see”: it lets you click on pre-defined “facets” (or filters) to list only the items that are included under these facets. A typical example is to select one or two collections: only the items belonging to those collections will be listed. Selecting a collection and a content type (for example “only audio items”) will list all the items of that collection that have an audio content.
SEARCH allows you to look for something specific. With the search option it is possible to type in specific keyword(s) which are then compared to the terms connected to the various objects and any matches are returned. Using the advanced search section, it is possible to restrict the search on only specific fields, and to select a time range in order to find only items that have a date associated with them which falls within the given range of years. DHO:Discovery is more geared towards browsing rather than searching as it relies
DISCOVER is a “explore-and-find”: it offers a less conventional access to the browse interface. It is still a way to apply few filter (like “Collection” or “Subject”) to the listing of items. But it presents these filters in unconventional ways such as through visualisations, for examples: a tag cloud or a treemap. The treemap, in particular, is a visualization first designed by Ben Shneiderman during the 1990s, and implemented here thanks to the library developed by Nicolas Garcia Belmonte . Treemap is a space-constrained visualization of hierarchical structures. In this case it allows to visually explore how items are grouped into subject terms and how Collections are subdivided into subject terms.