title: Boolean Value
role: manual
tags: #manual #reference #zettel #zettelstore
syntax: zmk
back: 00001004010000 00001004020000 00001006020400 00001010070200
backward: 00001004010000 00001004020000 00001006020400 00001010070200
box-number: 1
copyright: (c) 2020-present by Detlef Stern <ds@zettelstore.de>
created: 20210212135017
forward: 00001006033500
lang: en
license: EUPL-1.2-or-later
modified: 20251215165507
published: 20251215165507
visibility: public

On some places, metadata values are interpreted as a truth value.

Every character sequence that begins with a &ldquo;0&rdquo;, &ldquo;F&rdquo;, &ldquo;N&rdquo;, &ldquo;f&rdquo;, or a &ldquo;n&rdquo; is interpreted as the boolean &ldquo;false&rdquo; value.
All other values are interpreted as the boolean &ldquo;true&rdquo; value.

However, there is no full support for a boolean type.
Such values are interpreted as a [string value](00001006033500), e.g. with respect to comparing and sorting.