Thread:Project:Support desk/Are extension tags inline or block tags?/reply (2)

Good point. I should have phrased that more carefully.

I do understand that extension tags are evaluated on the server, while HTML tags are evaluated in the browser, but most extension tags are ultimately evaluated to HTML. Strictly speaking  and   are neither inline nor block tags of course, but that doesn't change the fact that   will always be converted into an HTML inline tag and   will always be evaluated to an HTML block tag - or so it seems to me. Most extension tags seem to fall into this category.

Those transclusion tags on the other hand are "abstract" in the sense that they won't be rendered to HTML at all. They're instructions for the parser.