Inliner
Definition
Inliner is a mental model or an abstract methodology for organizing data and writing articles. It originates from the outliner, where every text is a bullet point. Unlike the Outliner, the Inliner aims to separate the editing and reading experience by utilizing Markdown's strict line change mode. When editing, each sentence shows as a line for more accessible organization and editing. However, Markdown will automatically convert them into flowing text, making the reading experience more natural and immersive.
Apart from the paragraph, it also utilizes headers. Each sub-header and text will become inclusive of the super-header containing all.
That creates a mental model for a tree-like structure for organizing ideas.
Examples
An Outliner model will look like the following. Text from Outliner Wikipedia.
An equivalent Inliner model would look like this. Notice that the overall information conveyed is similar. However, Inliner utilizes different headers for organizing data. Finally, Inliner makes each datapoint (bullets in Outliner, sentences in Inliner) more flowable to read.
Comparison with Outliner

This is a personal preference, but Inliner looks much more welcoming to read for me.
References
Derek Sivers: Writing One Sentence Per Line
- Write one sentence per line to:
- help judge sentence by itself
- help varying sentence lengths
- help you organize content