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 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.