integrity constraint

integrity constraint

(database)
A constraint (rule) that must remain true for a database to preserve integrity. Integrity constraints are specified at database creation time and enforced by the database management system.

Examples from a genealogical database would be that every individual must be their parent's child or that they can have no more than two natural parents.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
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where Ri means the relation, Ii means the integrity constraint for i [member of] <1,n>; I means global integrity constraints for all relationships among relations.
Existence integrity constraint: [Tau] ([E.sub.i]) cannot have null or duplicate values for [k.sub.i], for all i = 1, 2, ..., n.
This condition is imposed by the integrity constraint in line 10, and relative to the facts in listing 1 it is instantiated to
A System Prototype for Map Editing and Integrity Constraint Validation
However, contrary to the schema constraint routine, in the integrity constraint routine the removal of a subtree (rooted at an update position p) triggers the subtree traversal for searching key and foreign key values involved in the update.
Note that the definition of local and global data items suggests that there be no integrity constraints between local and global data items at a site (as that could lead to an intersite integrity constraint involving local data items).
Partial subsumption is essentially the application of the subsumption algorithm with C as the integrity constraint and D as the body of a rule that defines a predicate.
In addition to defining a database in terms of an EDB and an IDB, it is necessary to formalize what is meant by an integrity constraint. Kowalski (1978) suggests that an integrity constraint is a formula that is consistent with the DDB, but for Reiter (1984) and Lloyd and Topor (1985), an integrity constraint is a theorem of the DDB.
Suppose the plane can carry at most 200 passengers, so that the integrity constraint of the system is res_seats [less than or equal to] 200.
And faced with challenging PCB interposer layout due to irregular routing patterns and signal integrity constraints, Intel engineers introduced a router using AI and ML at PCB West last year.

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