o1id

o1id is a term used in computing to denote a string-based identifier. It is not a formal standard or universally defined specification, but rather a generic placeholder that may appear in documentation, tutorials, or sample code to illustrate how an identifier might be used in a system. The name suggests a structured identifier that could resemble a prefix (o), a numeric component (1), and a label (id), but there is no single agreed-upon meaning across contexts.

In practice, o1id can function as a key or reference within software applications. It might serve as a primary key in a database, a reference token in an API, or a label for an in-memory object. Identifiers of this kind are typically represented as plain ASCII strings and may follow simple patterns such as o1id-<suffix> or o1id<digits>. Because there is no formal standard, the exact format, length, and character set can vary between projects.

Related concepts include UUIDs, GUIDs, and object identifiers (OIDs), which are standardized forms of unique identifiers with defined generation rules. When using any such identifier, systems commonly enforce validation rules (allowed characters, length, uniqueness) and proper escaping to prevent injection or parsing errors. The lack of a universal definition means o1id is best understood as a flexible, tutorial-friendly example rather than a portable, interoperable scheme.