An article is a kind of post that typically has more structure than a simple note. Articles usually have a name (title), multiple paragraphs, and often subheadings, blockquotes, and a footer of references or citations.
There are plenty of examples of IndieWeb sites posting articles, as articles essentially represent what used to simply be called "blog posts".
- At the time, I treated my site more like a journal and the design did not use titles for each post. In later years, I added default titles for entries missing them.
- First article on own domain: Invictus
- Imported old articles from Blogger going back to 2006-10-23 2006 articles
- Had previously and concurrently blogged on a variety of domains about various topics
ID markup for paragraphs etc
Marking up paragraphs with unique id attributes may enable more granular referencing for quotations within them, and possibly more granular comments as well.
Blogger introduced "titles" to blog posts in 1999? E.g.
- apparently Facebook hired the principals of the design studio that designed Medium: https://twitter.com/Fahrni/status/633287361409867776
- 2015-09-25 http://www.theverge.com/2015/9/25/9398895/facebook-notes-redesign
- 2015-10-09 https://blog.hootsuite.com/the-good-the-bad-and-the-ugly-medium-vs-facebook-notes/
(screenshots needed - Tantek has some he should get around to uploading)
Medium supports articles with a header image, a name, and minor style-editor.