CSQU1234567

CSQU1234567 is a sample alphanumeric identifier used in technical documentation to illustrate a code that combines a fixed prefix with a numeric sequence. The string is composed of four letters, CSQU, followed by seven digits, 1234567.

Format and interpretation: In many systems, the prefix designates a category, project, or organization, while the numeric portion provides a unique serial within that category. The exact meaning of CSQU and the digits depends on the implementation and is not standardized by a single authority.

Usage in practice: CSQU1234567 is commonly encountered in manuals, API tutorials, and mock databases as a neutral placeholder. It serves to demonstrate formatting, validation rules, sorting behavior, and search operations without referring to real persons or products.

Validation considerations: Real systems may enforce length checks (11 characters total), character class restrictions (uppercase letters in the prefix, digits in the suffix), and additional checks such as checksums or cross-field validation. The example itself, however, is not tied to a specific scheme.

Limitations and context: Because it is a fictitious or demonstration code, CSQU1234567 should not be construed as representing any real object. When used in documentation, it should be clearly labeled as a sample.

See also: Serial number; Product code; Identifier (data).