# JSON Feed Extensions Here is the documentation of all of my JSON Feed extensions. I have created these JSON Feed extensions in order to give users more metadata about my articles and talks. ## `_xesite_frontmatter` This extension is added to [JSON Feed Items](https://www.jsonfeed.org/version/1.1/#items-a-name-items-a) and gives readers a copy of the frontmatter data that I annotate my posts with. The contents of this will vary by post, but will have any of the following fields: * `about` (required, string) is a link to this documentation. It gives readers of the JSON Feed information about what this extension does. This is for informational purposes only and can safely be ignored by programs. * `series` (optional, string) is the optional blogpost series name that this item belongs to. When I post multiple posts about the same topic, I will usually set the `series` to the same value so that it is more discoverable [on my series index page](https://xeiaso.net/blog/series). * `slides_link` (optional, string) is a link to the PDF containing the slides for a given talk. This is always set on talks, but is technically optional because not everything I do is a talk. * `vod` (optional, string) is an object that describes where you can watch the Video On Demand (vod) for the writing process of a post. This is an object that always contains the fields `twitch` and `youtube`. These will be URLs to the videos so that you can watch them on demand.