@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix edu: <https://knobit.org/def/> .
@prefix knobit: <https://knobit.org/id/knobit/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix register: <https://knobit.org/id/register/> .
@prefix schema: <https://schema.org/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

knobit:Q-304 a edu:Knobit ;
    rdfs:label "Recognises a derived or copied column without a check"@en ;
    dcterms:identifier "Q-304" ;
    dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
    dcterms:source "Review checklist 03-dq-rules (data-quality), row 4; Kimball & Caserta 2004; this skill (06-physical.md); formerly data-modelling K-704"@en ;
    skos:altLabel "Derived or copied column nobody watches (data quality rule)"@en ;
    skos:definition "A column carrying `derivation` — a stored total, a copied name, a path string — with no check comparing it with a fresh computation. The update anomaly was accepted on purpose; the check is what makes it safe. A snapshot meant to keep the value as it was is not a copy and needs no check: say so in the `derivation`."@en ;
    skos:prefLabel "Recognises a derived or copied column without a check"@en ;
    edu:actionVerb "Recognises"@en ;
    edu:appliesKnowledge knobit:K-565 ;
    edu:assessmentCriterion "Flags the deficient case and passes the acceptable one. Deficient: `account.holder_name` copied from `party.name` with `derivation: \"copied by ETL\"`; the ETL step is disabled in a refactor and nobody notices for a year Acceptable: `DQ-021`, `dimension: consistency`, `scope: set`, comparing `account.holder_name` with `party.name` through `holder_party_id`, `backs: [PE-057]` (`DQR-019`)"@en ;
    edu:assessmentMethod "skill-tests task: Loan application data quality rules on Snowflake (DQ rule anomaly skills)"@en ;
    edu:contextFunction <https://knobit.org/def/contextFunction/resultEvaluation> ;
    edu:creationMethod <https://knobit.org/def/creationMethod/aiGeneratedHumanEdited> ;
    edu:dependsOnKnobit knobit:K-601,
        knobit:K-603 ;
    edu:expectedResult "The column and its recomputation check"@en ;
    edu:graphRelevance <https://knobit.org/def/graphRelevance/learnerState>,
        <https://knobit.org/def/graphRelevance/taskSelection> ;
    edu:knobitType <https://knobit.org/def/knobitType/skill> ;
    edu:targetObject "column carrying a derivation"@en ;
    schema:creativeWorkStatus "accepted" ;
    schema:isPartOf register:data-quality .

edu:Knobit rdfs:label "Knobit"@en,
        "Knobit"@et .

knobit:K-565 rdfs:label "Explains derived data and point-in-time snapshots"@en .

knobit:K-601 rdfs:label "Recognises an unmanaged duplicate column"@en .

knobit:K-603 rdfs:label "Recognises a stored derived or summary value"@en .