Consider the feasibility to make collection abbreviations, widely used as labels for
institute collections, globally unique.
Ideally, collection abbreviations would be globally unique. But, probably not worth the effort in practice as long as PIDs are used. For “Material Examined” sections, authors often copy and paste their key to abbreviations from one paper to the next. Those keys may not be up-to-date, referable to an established index, or vetted with the source collection. In short, it may be too difficult to get authors to consistently use a standard abbreviation. It might be easier to simply link multiple abbreviations to a single, stable PID.