Source: wikibot/formation-rule
= Formation rule
{wiki=Formation_rule}
The term "formation rule" can refer to different concepts depending on the context in which it is used. Here are a few interpretations: 1. **Mathematics and Logic**: In formal systems, a formation rule specifies how certain symbols can be combined to form valid expressions or statements. For example, in formal grammars, a formation rule might determine how to construct sentences from a set of symbols.