"Authoring knowledge in formal logic is too complex ..., while ... unconstrained natural language is generally too difficult for computers .... However, ... authoring knowledge in a restricted subset of natural language ... hits a 'sweet spot' ..., being both usable by humans and understandable by machines." (Clark et al., 2005).

"[A] well-designed controlled natural language ... is an ideal candidate to increase the transparency of the Semantic Web and to empower non-specialists with a 'seemingly informal' language ..." (Schwitter, 2005).