title: Encoding of Sz Metadata role: manual tags: #api #manual #reference #zettelstore syntax: zmk back: 00001012931000 backward: 00001012931000 box-number: 1 copyright: (c) 2020-present by Detlef Stern created: 20230403161618 forward: 00001006030000 00001006031000 00001006031500 00001006032000 00001006032500 00001006033000 00001006033500 00001006034000 00001006034500 00001006035000 00001006035500 lang: en license: EUPL-1.2-or-later modified: 20250115172406 published: 20250115172406 visibility: public A single metadata (“metadatum”) is represented by a triple: a symbol representing the type, a symbol representing the key, and either a string or a list that represent the value. The symbol depends on the [metadata key type](00001006030000). The value also depends somehow on the key type: a set of values is represented as a list, all other values are represented by a string, even if it is a number. The following table maps key types to symbols and to the type of the value representation. Examples: * The title of this zettel is represented as: `(EMPTY-STRING title "Encoding of Sz Metadata")` * The tags of this zettel are represented as: `(TAG-SET tags ("#api" "#manual" "#reference" "#zettelstore"))`