title: Reserved zettel identifier role: manual tags: #design #manual #zettelstore syntax: zmk backward: 00001006050000 box-number: 1 copyright: (c) 2020-present by Detlef Stern created: 20210721105704 forward: 00000999999999 00001000000000 00001004020000 00001005090000 00001006050000 lang: en license: EUPL-1.2-or-later modified: 20250102222416 published: 20250102222416 visibility: public [[Zettel identifier|00001006050000]] are typically created by examining the current date and time. By renaming the name of the underlying zettel file, you are able to provide any sequence of 14 digits. To make things easier, you must not use zettel identifier that begin with four zeroes (''0000''). All zettel provided by an empty zettelstore begin with six zeroes[^Exception: the predefined home zettel is ''00010000000000''. But you can [[configure|00001004020000#home-zettel]] another zettel with another identifier as the new home zettel.]. Zettel identifier of this manual have be chosen to begin with ''000010''. However, some external applications may need at least one defined zettel identifier to work properly. Zettel [[Zettelstore Application Directory|00000999999999]] (''00000999999999'') can be used to associate a name to a zettel identifier. For example, if your application is named ""app"", you create a metadata key ''app-zid''. Its value is the zettel identifier of the zettel that configures your application. === Reserved Zettel Identifier |= From|=To|=Description |00000000000000|00000000000000|This is an invalid zettel identifier |00000000000001|00000999999999|[[Predefined zettel|00001005090000]] |00001000000000|00001099999999|This [[Zettelstore manual|00001000000000]] |00001100000000|00008999999999|Reserved, do not use |00009000000000|00009999999999|Reserved for applications ==== External Applications |= From|=To|=Description |00009000001000|00009000001999|[[Zettel Presenter|https://zettelstore.de/contrib]], an application to display zettel as an HTML-based slideshow