title: Zettelmarkup: Basic Definitions role: manual tags: #manual #zettelmarkup #zettelstore syntax: zmk back: 00001007000000 backward: 00001007000000 box-number: 1 copyright: (c) 2020-present by Detlef Stern created: 00010101000000 lang: en license: EUPL-1.2-or-later modified: 20220218130713 published: 20220218130713 visibility: public Every Zettelmarkup content consists of a sequence of Unicode code-points. Unicode code-points are called in the following as **character**s. Characters are encoded with UTF-8. ; Line : A __line__ is a sequence of characters, except newline (U+000A) and carriage return (U+000D), followed by a line ending sequence or the end of content. ; Line ending : A __line ending__ is either a newline not followed by a carriage return, a newline followed by a carriage return, or a carriage return. Different line can be finalized by different line endings. ; Empty line : An __empty line__ is an empty sequence of characters, followed by a line ending or the end of content. ; Space character : The __space character__ is the Unicode code-point U+0020.