Feature: Implement conditional SHACL logic for smarter validation

[MartinM10]

Currently, our SHACL shapes in edaan-shapes.ttl primarily validate structural existence using minCount (e.g., "A Profile must have metrics"). However, they do not enforce business logic dependent on specific data types.

We need to upgrade our validation layer to support Conditional SHACL (sh:if, sh:then, sh:else) to catch logical inconsistencies.

Proposed Task

• Update edaan-shapes.ttl to include conditional rules.
• Rule 1: IF a Profile declares bigdat:VectorData, THEN edaan:hasCRS must be mandatory (minCount 1).
• Rule 2: IF a Profile declares bigdat:TabularData, check for relevant tabular metrics (optional but recommended warning).

Example Implementation

:VectorDataCRSShape a sh:NodeShape ;
    sh:targetClass :DataProfile ;
    sh:if [
        sh:path :declaresDataClass ;
        sh:hasValue bigdat:VectorData ;
    ] ;
    sh:then [
        sh:path :hasCRS ;
        sh:minCount 1 ;
        sh:message "Vector Data MUST have a Coordinate Reference System (CRS)."@en ;
    ] .