(((meta (@ (content . "Syntax of Metadata") (name . "title"))) (meta (@ (content . "manual") (name . "role"))) (meta (@ (content . "#manual #syntax #zettelstore") (name . "tags"))) (meta (@ (content . "zmk") (name . "syntax"))) (meta (@ (content . "00001006000000 00001006020000 00001006031500 00001007701000 00001007702000 00001012053200 00001012054200") (name . "back"))) (meta (@ (content . "00001006000000 00001006020000 00001006031500 00001007701000 00001007702000 00001012053200 00001012054200") (name . "backward"))) (meta (@ (content . "1") (name . "box-number"))) (meta (@ (content . "(c) 2020-present by Detlef Stern <ds@zettelstore.de>") (name . "copyright"))) (meta (@ (content . "20210126175322") (name . "created"))) (meta (@ (content . "en") (name . "lang"))) (meta (@ (content . "EUPL-1.2-or-later") (name . "license"))) (meta (@ (content . "20240219193158") (name . "modified"))) (meta (@ (content . "20240219193158") (name . "published"))) (meta (@ (content . "public") (name . "visibility")))) (p "The" " " "metadata" " " "of" " " "a" " " "zettel" " " "is" " " "a" " " "collection" " " "of" " " "key-value" " " "pairs." " " "The" " " "syntax" " " "roughly" " " "resembles" " " "the" " " "internal" " " "header" " " "of" " " "an" " " "email" " " "(" (a (@ (class . "external") (href . "https://tools.ietf.org/html/rfc5322")) "RFC5322") ").") (p "The" " " "key" " " "is" " " "a" " " "sequence" " " "of" " " "alphanumeric" " " "characters," " " "a" " " "hyphen-minus" " " "character" " " "(" (@L (@H "&ldquo;") (kbd "-") (@H "&rdquo;")) "," " " "U+002D)" " " "is" " " "also" " " "allowed." " " "It" " " "begins" " " "at" " " "the" " " "first" " " "position" " " "of" " " "a" " " "new" " " "line." " " "Uppercase" " " "letters" " " "of" " " "a" " " "key" " " "are" " " "translated" " " "to" " " "their" " " "lowercase" " " "equivalence.") (p "A" " " "key" " " "is" " " "separated" " " "from" " " "its" " " "value" " " "either" " " "by") (ul (li "a" " " "colon" " " "character" " " "(" (@L (@H "&ldquo;") (kbd ":") (@H "&rdquo;")) "),") (li "a" " " "non-empty" " " "sequence" " " "of" " " "space" " " "characters,") (li "a" " " "sequence" " " "of" " " "space" " " "characters," " " "followed" " " "by" " " "a" " " "colon," " " "followed" " " "by" " " "a" " " "sequence" " " "of" " " "space" " " "characters.")) (p "A" " " "value" " " "is" " " "a" " " "sequence" " " "of" " " "printable" " " "characters." " " "If" " " "the" " " "value" " " "should" " " "be" " " "continued" " " "in" " " "the" " " "following" " " "line," " " "that" " " "following" " " "line" " " "(" (@L (@H "&ldquo;") "continuation" " " "line" (@H "&rdquo;")) ")" " " "must" " " "begin" " " "with" " " "a" " " "non-empty" " " "sequence" " " "of" " " "space" " " "characters." " " "The" " " "rest" " " "of" " " "the" " " "following" " " "line" " " "will" " " "be" " " "interpreted" " " "as" " " "the" " " "next" " " "part" " " "of" " " "the" " " "value." " " "There" " " "can" " " "be" " " "more" " " "than" " " "one" " " "continuation" " " "line" " " "for" " " "a" " " "value.") (p "A" " " "non-continuation" " " "line" " " "that" " " "contains" " " "a" " " "possibly" " " "empty" " " "sequence" " " "of" " " "characters," " " "followed" " " "by" " " "the" " " "percent" " " "sign" " " "character" " " "(" (@L (@H "&ldquo;") (kbd "%") (@H "&rdquo;")) ")" " " "is" " " "treated" " " "as" " " "a" " " "comment" " " "line." " " "It" " " "will" " " "be" " " "ignored.") (p "Parsing" " " "metadata" " " "ends," " " "if" " " "an" " " "empty" " " "line" " " "is" " " "found" " " "or" " " "if" " " "a" " " "line" " " "with" " " "at" " " "least" " " "three" " " "hyphen-minus" " " "characters" " " "is" " " "found.") (p "Some" " " "examples:") (pre (code (@ (class . "language-meta")) "title1:The Title\n title-2 : Another title\ntitle-3: A wrapped\n title\ntitle-4: A\n wrapped\n title\n with\n more\n than\n one\n  continuation\n line\n% A comment line\n % Another comment line.\n\nNo metadata anymore, because of the empty line.")))