Markdown documents must contain yaml frontmatter to be treated as zettels. The following metadata will be read from the frontmatter and shown in card's header.
Key: id
Currently, only 14 digits format %Y%m%d%H%M%S (datetime's format) is supported.
Keys: date or last_update
The following formats of date strings (datetime's format) are understood:
%Y-%m-%d %H:%M:%S%Y%m%d%H%M%S%Y-%m-%dWhen last_update key is found in the frontmatter, then it is the value that will be always used as the last modification date for a zettel.
Alternatively, this plugin attempts to convert id key to a date in case both date and last_update keys are missing. As the last resort, the date of site build is used.
Last modification date from the file system or git repository will be used if it is more recent than any date determined so far (with the exception of last_update date which always wins).
Key: tags
List of tags according to the syntax of yaml array list