I've implemented a rudimentary tagging system, see
http://bahai-library.com/tags/ . If you have a favorite topic or name that sometimes is hard to search for, and can contribute a few minutes of your time to tagging the relevant documents, please pm or email me at
http://bahai-library.com/contact Tags" are simplified spellings, minus all accents and punctuation, used to find documents on a similar topic but with various titles.
The first tag we created,
http://bahai-library.com/tags/mashriquladhkar , was necessary to find variants such as "Mashrak el Azkar", "Mashriqu'l-Adhkár", "House of Worship", and "Baha'i Temple". Similarly,
http://bahai-library.com/tags/ishqabad covers spellings like Ishqabád, Ashgabat, Ashqabád, and Ashkhabad.
I'm not taking suggestions — I've got other projects, so won't be doing this work myself unless I have to for certain topics — but will welcome any help.