ONE plugin URI — a rack member, a preset. Printable and length-capped like text, and
NON-EMPTY: the empty string names no plugin, so it is a refusal rather than a silent clear.
Where an entity needs "no plugin here" it reads '' and says so through its own field doc;
a client asking for that writes the rack without the member instead.
ONE plugin URI — a rack member, a preset. Printable and length-capped like text, and NON-EMPTY: the empty string names no plugin, so it is a refusal rather than a silent clear. Where an entity needs "no plugin here" it reads
''and says so through its own field doc; a client asking for that writes the rack without the member instead.