Submitted by Mark Birbeck on Fri, 11/07/2008 - 14:15.
When sending small comments via services such as Twitter, it's pretty straightforward to add links to other documents. The general pattern is to abbreviate the link using an online service, and then paste the shortened link into your post. Software that displays your posts can then replace any string that begins with http: with a real link.
However, there are many occasions where a link is just not good enough. Sometimes you'd like to embed an image, or even a video. But if we start trying to add HTML mark-up, we'll pretty soon hit the character limit imposed by micro-blogging platforms.
Enter compact HTML, or CHTML...for short.