restId

Restid is a term used informally in software development to denote the identifier of a resource in a RESTful context or as a generic placeholder for an object's ID. It is not a formal standard with a single agreed definition, and its exact meaning depends on context and project conventions. Variants in casing such as restId or rest_id are common.

In RESTful APIs, resources are identified by URIs. A restid may refer to the value in the path or query that specifies which resource to retrieve or modify, for example GET /api/users/{restid} or GET /orders?restid=abcd123. The restid can be numeric, alphanumeric, or a Universally Unique Identifier (UUID).

In code and documentation, restid is often used as a variable name to store such identifiers (for example, string restId). It may also appear in examples as a placeholder that readers replace with real IDs.

Best practices emphasize choosing stable, non-sensitive identifiers when possible and avoiding leakage of internal database keys; in some cases opaque identifiers or tokens are preferred over sequential IDs.

See also REST, RESTful API, resource identifier, UUID.