((META (EMPTY-STRING title "Boolean Value") (WORD role "manual") (TAG-SET tags ("#manual" "#reference" "#zettel" "#zettelstore")) (WORD syntax "zmk") (ZID-SET back ("00001004010000" "00001004020000" "00001006020400" "00001010070200")) (ZID-SET backward ("00001004010000" "00001004020000" "00001006020400" "00001010070200")) (NUMBER box-number "1") (STRING copyright "(c) 2020-present by Detlef Stern <ds@zettelstore.de>") (TIMESTAMP created "20210212135017") (ZID-SET forward ("00001006033500")) (WORD lang "en") (EMPTY-STRING license "EUPL-1.2-or-later") (TIMESTAMP modified "20220304114040") (TIMESTAMP published "20220304114040") (WORD visibility "public")) (BLOCK (PARA (TEXT "On some places, metadata values are interpreted as a truth value.")) (PARA (TEXT "Every character sequence that begins with a ") (FORMAT-QUOTE () (TEXT "0")) (TEXT ", ") (FORMAT-QUOTE () (TEXT "F")) (TEXT ", ") (FORMAT-QUOTE () (TEXT "N")) (TEXT ", ") (FORMAT-QUOTE () (TEXT "f")) (TEXT ", or a ") (FORMAT-QUOTE () (TEXT "n")) (TEXT " is interpreted as the boolean ") (FORMAT-QUOTE () (TEXT "false")) (TEXT " value.") (SOFT) (TEXT "All values are interpreted as the boolean ") (FORMAT-QUOTE () (TEXT "true")) (TEXT " value.")) (PARA (TEXT "However, there is no full support for a boolean type.") (SOFT) (TEXT "Such values are interpreted as a ") (LINK-ZETTEL () "00001006033500" (TEXT "string value")) (TEXT ", e.g. with respect to comparing and sorting."))))