Kernattribute

Kernattribute, often used in German-language data modeling and knowledge management, denotes an attribute that is essential to the definition of an entity or concept. It represents core descriptive properties that are needed to identify or characterize the object in a stable way, and it is typically contrasted with optional or derived attributes.

In practice, Kernattribute are those properties that participate in identity and fundamental state. In database design they often align with identifiers or natural keys, such as a unique product code or person ID, and with essential descriptive fields. Attributes considered optional may vary by context or over time.

The concept supports data quality, interoperability, and governance. Choosing which attributes are core influences data normalization, exchanges, and query design, because core attributes are usually required for recognition, matching, and basic reporting across systems.

Determining Kernattribute involves domain analysis and stakeholder input. Criteria include uniqueness, invariance across subdomains, stability over time, and necessity for correct interpretation of the entity.

Examples: In an employee record, core attributes might be employee_id, legal_name, date_of_birth, and start_date; in a product catalog, core attributes include product_id, name, category, and price. Optional attributes could include color, size, supplier, and customer notes.

See also: primary key, natural key, essential attribute, data governance. Note: the term is not universally standardized and can vary by domain and language.