YAML Front Matter
Definition
YAML Front Matter contains metadata at the beginning of a document for supporting processing systems.
A YAML block delimited by markers at the start of a document, which certain generators interpret as metadata.
Simply explained
At the start of the document is a small profile, e.g., with title and date. A suitable program reads this information separately.
Why it matters in practice
The term contributes to secure, maintainable, and high-performance web applications as well as resilient technical decisions.
Example from business
Documentation stores title, date, and release status in validated front matter.
Limits and pitfalls
- Field schema and delimiter syntax are tool-specific; untrusted values must not directly control templates or code.
Origin & history
Static site generators like Jekyll popularized front matter; it is not a feature of the YAML standard itself.
Use in mid-sized companies
- Possible example: Documentation stores title, date, and release status in validated front matter.
Frequently asked questions
What does YAML metadata block (Front Matter) mean?
A YAML block delimited by separators at the beginning of a document, interpreted as metadata by certain generators. What should be considered? Field schema and delimiter syntax are tool-specific; untrusted values must not directly control templates or code.
Sources
- Front Matter · Jekyll, Front Matter
Source checked on 10.10.2026. Editorial usage examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: