Items you reference in Bibale can have tags associated with them.
Those tags can be public or private. To make a tag private, simply
prefix it with '#', so 'foo' is a public tag anyone will be able to
search on and '#bar' is a private tag only you will be able to search.

 So far private tags were different from public tags as far as search
was concerned, you had to explicitely use the '#' in search too and
they could not benefit from stemming (so #cats would only match #cats,
not #cat).

 This time has come to an end, private tags are now at the same level
as public ones, so if you tag an item '#cats' you can find it by
searching for '#cats' but also '#cat' or simply 'cat'.