Values of this type denote a (sorted) set of tags.

A set is different to a list, as no duplicate values are allowed.
=== Allowed values
Every tag must must begin with the number sign character (""''#''"", U+0023), followed by at least one printable character.
Tags are separated by space characters.

All characters are mapped to their lower case values.
=== Query comparison
All comparisons are done case-sensitive, i.e. ""#hell"" will not be the prefix of ""#Hello"".
=== Sorting
Sorting is done by comparing the [[String|00001006033500]] values.