Cognitive grammar takes a nonstandard view of linguistic semantics and grammatical structure. Meaning is equated with conceptualization. Semantic structures are characterized relative to cognitive domains, and derive their value by construing the content of these domains in a specific fashion. Grammar is not a distinct level of linguistic representation, but reduces instead to the structuring and symbolization of conceptual content. All grammatical units are symbolic: Basic categories (e.g., noun and verb) are held to be nationally definable, and grammatical rules are analyzed as symbolic units that are both complex and schematic. These concepts permit a revealing account of grammatical composition with notable descriptive advantages.