Author and tag lists may be semicolon-separated instead, which allows you to write authors and tags containing commas:
|tags:||pelican, publishing tool; pelican, bird|
|authors:||Metaireau, Alexis; Doyle, Conan|
Pelican implements an extension to reStructuredText to enable support for the abbr HTML tag. To use it, write something like this in your post:
This will be turned into HTML.