objectsformulas

Objectsformulas are expressions used to specify derived values and constraints over objects in object-oriented models, programming, and data modeling. They describe computations that access object attributes, navigate relationships, and combine results with operators to yield a value.

A typical objectsformula comprises operands (object attributes, literals, and the results of subformulas) and operators (arithmetic, boolean, comparison, and aggregation). It can reference a single object or a collection by navigating associations and may include quantifiers such as exists and forAll to express constraints over multiple objects.

Semantics may be eager or lazy, and dependencies are tracked so that derived values update when underlying data changes. In model-driven and constraint contexts, objectsformulas form derived attributes or validation rules and can be evaluated at design time or runtime.

Example: For a Person with age and a collection accounts containing balance, the formula isAdult := age >= 18, and totalBalance := sum(account.balance).

Applications include model validation, runtime data binding, and query-like filtering in object stores and ORM systems. Objectsformulas are related to constraint languages such as OCL and to data query formalisms that operate over object graphs, offering a lightweight way to express computed properties and rules within object-centric models.