C1V1C2V2

C1V1C2V2 is a compact, placeholder notation used to describe a four-part sequence composed of two basic component types, labeled C and V, with subscripts to distinguish specific instances or variants. The exact meaning of C and V varies by domain, and there is no single, universal definition for the string itself.

In linguistics and phonology, C often stands for a consonant and V for a vowel. C1V1C2V2 can be used to illustrate a four-slot syllable frame or a pattern of alternating consonant and vowel segments, where C1 and C2 denote two distinct consonantal positions and V1 and V2 denote two distinct vowel positions. This helps in comparing syllable structures across languages or in analyzing phonotactic constraints that govern allowable sequences.

In computer science and formal linguistics, C and V can be treated as abstract token classes. C1V1C2V2 then represents a template or pattern that parsing algorithms or automata may try to recognize or generate. The subscripts distinguish different occurrences of the same class, allowing precise formulation of constraints or rules in pattern matching, grammar design, or data encoding schemes.

Beyond these domains, C1V1C2V2 may be used as an example template to discuss sequence design, variant handling, or transformation rules. Because the notation is generic, its interpretation is context-dependent and must be defined within the specific theory, problem, or dataset in which it appears. See also pattern notation, syllable structure, and token classes.