Recognises an entity identified only by a system-assigned key
https://knobit.org/id/knobit/K-518
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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 natural keys, surrogate keys and key stability |
| applies knowledge | Explains how database tables and relationships are structured |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: Party with `primary_key: [Party Id]` and no `natural_key`; the same company registered twice under two ids Acceptable: `primary_key` and `natural_key` on the business identifier (registry code, personal identification code); where none exists, say so and record the duplicate-matching rule as a data rule with an enforcement 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-518 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 03-logical, row 18; Karwin, ID Required; S&W ch. 6 en |
| expected result | The entity and the business identifier it lacks as a natural key en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/05-logical/18 |
| rdfs:label | Recognises an entity identified only by a system-assigned key en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | System-assigned key only (logical model) en |
| skos:definition | The entity's only identifier is a number the system assigns, and nothing the business uses to tell instances apart is recorded as `natural_key`. Nothing then stops the same thing being recorded twice. A surrogate key is a physical decision in this skill. A specific form of row 17. en |
| skos:prefLabel | Recognises an entity identified only by a system-assigned key en |
| target object | entity with only a system-assigned key en |
Used by
| depends on knobit | Recognises a surrogate key without natural-key uniqueness |
|---|---|
| includes knobit | Derives a normalised logical data model and traces anomalies to their causes |
| requires knobit | Derive the logical data model |