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This repository has been archived by the owner on Jan 27, 2021. It is now read-only.
The metadata of a zettel is a collection of key-value pairs.
The syntax roughly resembles the internal header of an email ([[RFC5322|https://tools.ietf.org/html/rfc5322]]).
The key is a sequence of alphanumeric characters, a hyphen-minus character (""''-''"") is also allowed.
It starts at a new line.
A key is separated from its value either by
* a colon character (""'':''""),
* a non-empty sequence of space characters,
* a sequence of space characters, followed by a colon, followed by a sequence of space characters.
A Value is a sequence of printable characters.
If the value should be continued in the following line, that following line (//continuation line//) must start 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.
A non-continuation line that contains a possibly empty sequence of characters, followed by the percent sign character (""''%''"") is treated as a comment line.
It will be ignored.
Parsing metadata ends, if an empty line is found or if a line with at least three hyphen-minus characters is found.