Nýtsla rætta

Zenexer (talk · contribs)'s explanation:

This template is particularly useful as a meta-metatemplate. A metatemplate can use, for example, {{1x|<}}includeonly{{1x|>}} to generate an <includeonly> tag. Unlike such a tag made with XML/HTML entities (< and >), this tag will be evaluated when the resulting template is substituted.

See also rætta