Sort works in search results

[dvglc]

Potential criteria for sorting:

• 1.) by relevance (absolute / relative frequency of hits)
• 2.) alphabetically (author / title)
• 3.) some clever mix of 1.) and 2.)
• ...?

[awagner-mainz]

My first intuition, also taking into account the current way of presenting the summaries/labels for results: I would expect the default sorting to be alphabetical, first by author, then by title.

Other thoughts:

• For sorting by relevance we should probably break up grouping by work.
• Finally, it would be interesting to be capable to also sort (or rather group?) by date and see how my results we have per time epoch (like decade).