YAML frontmatter is used in 8 Glossary/Markdown files to define variables and their values. It is an important element of Obsidian too. It is defined at the top of a note and is contained within --- and ---.
It looks like this:
---
cover:
booktitle: The Handmaid's Tale
author: Margaret Atwood
author_sort: Atwood, Margaret
isbn: 9781551994963
rating:
publisher: McClelland & Stewart
publication_date: 1999-05-08
language: en
pages:
series:
series_index:
translator:
illustrator:
tags:
- read
description:
notes:
---