Recognises a chasm trap
https://knobit.org/id/knobit/K-525
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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 the connection, fan and chasm traps |
| assessment criterion | Flags the deficient case and passes the acceptable one. Deficient: Branch 1:N Account Manager 1:N Account with Account → Account Manager optional: accounts opened online have no path to a branch and vanish from branch totals (row 24's fix can create this) Acceptable: A direct Account → Branch relationship, or a direct-channel branch, so every account reaches exactly one en |
| assessment method | skill-tests task: Loan application logical model (normalisation anomaly skills) en |
| dcterms:identifier | K-525 |
| dcterms:license | https://creativecommons.org/licenses/by/4.0/ |
| dcterms:source | Review checklist 03-logical, row 25; Howe; C&B en |
| expected result | The path, the optional relationship on it, and the instances that drop out en |
| rdfs:label | Recognises a chasm trap en |
| schema:creativeWorkStatus | accepted |
| schema:isPartOf | Data modelling (DAMA-DMBOK2) |
| skos:altLabel | Chasm trap (logical model) en |
| skos:definition | A path exists, but an optional relationship on it breaks it for some instances, so they silently drop out of every query that follows the path. en |
| skos:prefLabel | Recognises a chasm trap en |
| target object | chasm trap en |
Used by
| depends on knobit | Recognises a nullable foreign key on a reporting join path |
|---|---|
| includes knobit | Derives a normalised logical data model and traces anomalies to their causes |
| requires knobit | Derive the logical data model |