Clientdefined

Clientdefined is a term used in software architecture to describe data definitions, identifiers, or schema elements that are provided by the client rather than being fixed by the server. In clientdefined models, the client introduces custom fields, keys, or categories that extend the server’s data model at the edge of the system. The server typically accepts and stores these client-provided definitions as flexible structures, such as opaque key-value pairs or metadata, often using a reserved namespace to minimize collisions with server-defined data.

Usage scenarios include APIs and data stores that support customizable records. For example, an API might allow a product or contact object to include a clientDefinedFields map where clients store domain-specific attributes. Similarly, customers in a software-as-a-service platform may create custom fields to capture organization-specific information without requiring server-side schema changes.

Benefits of clientdefined approaches include greater flexibility and faster iteration, as clients can model domain concepts without waiting for central schema updates. This can improve adaptability in multi-tenant or configurable environments and reduce deployment overhead associated with schema migrations.

Challenges encompass data quality and governance, collision risk, and performance considerations. Without careful controls, clientdefined data can become inconsistent or unqueryable. Common practices to mitigate issues include namespacing conventions for client keys, strict validation rules, documented schemas for client attributes, and limits on the scope or size of clientdefined data. Related concepts include dynamic schemas and client-generated metadata.