Comment 3 for bug 1106231

Regarding:

+ Show the full tag name. Fix committed

+ Rename hierarchical tags: won't fix. The underlying mechanism operates on one item, and I don't want to change that.

+ "muti" tags: create an empty book with all the tags you want to predefine.

+ The order of items in a list is not guaranteed. If you want the list to be sorted before you extract the first element, use template program mode or general program mode and sort the list. For example, in template program mode you would use something like:
{tags:'sublist(list_sort($, 0, ','), 0 ,1 , ',')'}