Recognises a join dependency kept in one entity
https://knobit.org/id/knobit/K-513
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| Context functions | Result evaluation |
|---|---|
| Knobit creation methods | AI generated, human edited |
| Knobit types | Skill |
| LCG purposes | Assessing the learner's knowledge or skill state |
| LCG purposes | Selecting an assessment task or learning activity |
| action verb | Recognises en |
| applies knowledge | Explains join dependency and fifth normal form |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: Branch Channel Product as one entity, although the rule is that a branch offers every product it is authorised for through every channel it operates; one new authorisation needs a row per channel Acceptable: Three entities (Branch Channel, Channel Product, Branch Product) when the cyclic rule holds, recorded as a data rule; the three-way entity when it does not en |
| assessment method | skill-tests task: Loan application logical model (normalisation anomaly skills) en |
| conforms to profile | https://oppekava.edu.ee/a/Knobitite_kirjeldamise_ja_seostamise_reeglid#LCG-KNOBIT-0.1 |
| dcterms:identifier | K-513 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 03-logical, row 13; Fagin 1979; Kent 1983; S&W 13.4 en |
| expected result | The three-way entity and the cyclic rule that does or does not make it decomposable en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/05-logical/13 |
| rdfs:label | Recognises a join dependency kept in one entity en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | Join dependency (5NF) (logical model) en |
| skos:definition | A three-way entity that can be rebuilt from its pairwise projections because of a cyclic business rule, kept as one entity; or the reverse, three pairwise entities joined as if the rule held when it does not. en |
| skos:prefLabel | Recognises a join dependency kept in one entity en |
| target object | join dependency in a three-way entity en |
Used by
| includes knobit | Derives a normalised logical data model and traces anomalies to their causes |
|---|---|
| requires knobit | Derive the logical data model |