Metadata in Markdown

Jun 24, 2024 Sep 20, 2024 (IST)

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Alternatives to putting the markdown title in TOML/YAML.

Because frontmatter breaks Markdown syntax and puts the title at the same importance as other metadata like the date and thumbnail.

The title is a primary piece of data for the document, and it is not on the same level of importance as the date.

With frontmatter, your Markdown (not metadata) document starts with a level 2 heading and no level 1 heading, or it has multiple level 1 headings (titles).

Instead, put the document heading at the top using Markdown syntax, and add metadata like the date below that.

Solution 1: metadata tag🔗

Since Markdown requires extension with HTML, and is primarily an HTML generation tool, we could use a ‘metadata’ tag.

# My document title

<metadata
  date="2024-06-24"
  update="2024-06-27"
/>

post content ...

‘metadata’ could also be shortened to ‘meta’ for the convenience of authors, but there should ideally be a simple template and a new command to create a skeleton and fill in the basic information.

You can also prefix the tag with a ‘namespace’ of sorts, to avoid potential collisions. Hugo would call it hugo-metadata, while Zola might call it zola-metadata.

<my-metadata
  date="2024-06-24"
  update="2024-06-27"
/>

It should be easy to use HTML if the tool already uses it, although XML/HTML can be verbose for some people.

Solution 2: metadata “code” block🔗

Another solution is to author metadata in YAML, TOML, or whatever format is already used, by using a code block with the ‘metadata’ language.

```metadata
date: 2024-06-24
update: 2024-06-27
```

In addition to the previous ‘meta’ suggestion, you could also include the metadata format if multiple formats are available, with a default format if none is included.

```metadata/toml
date = 2024-06-24
update = 2024-06-24
```

Specifiers like metadata/toml are also used in HTTP responses as well as HTML link elements.

Most markup formats include code blocks, and setting the language should be easy. Plus people tend to like YAML/TOML over XML/HTML.