Recognises independently changing histories in one entity
https://knobit.org/id/knobit/K-520
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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 sixth normal form for temporal data |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: Account Version (Account, valid from, account status, interest rate, servicing branch) Acceptable: One history per group of attributes that change together: Account Status History, Account Interest Rate History, each with its own validity 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-520 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 03-logical, row 20; DDL 2014 en |
| expected result | The attributes that change independently and share one validity period en |
| owl:sameAs | https://bitbucket.org/reffa/ontology/id/knobit/data-modelling/05-logical/20 |
| rdfs:label | Recognises independently changing histories in one entity en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | Independent histories in one entity (6NF) (logical model) en |
| skos:definition | In an entity that keeps history, attributes that change independently share one row and one validity period, so a change to any one repeats all the others and "when did X change?" needs consecutive rows compared. en |
| skos:prefLabel | Recognises independently changing histories in one entity en |
| target object | independent histories sharing one validity period en |
Used by
| includes knobit | Derives a normalised logical data model and traces anomalies to their causes |
|---|---|
| requires knobit | Derive the logical data model |