glam/.opencode/rules/linkml/ontology-detection-rule.md
kempersc 554fe520ea Add comprehensive rules for LinkML schema management and ontology mapping
- Introduced Rule 42: No Ontology Prefixes in Slot Names to enforce clean naming conventions.
- Established Rule: No Rough Edits in Schema Files to ensure structural integrity during modifications.
- Implemented Rule: No Version Indicators in Names to maintain stable semantic naming.
- Created Rule: Ontology Detection vs Heuristics to emphasize the importance of verifying ontology definitions.
- Defined Rule 50: Ontology-to-LinkML Mapping Convention to standardize mapping practices.
- Added Rule: Polished Slot Storage Location to specify directory structure for polished slot files.
- Enforced Rule: Preserve Bespoke Slots Until Refactoring to prevent unintended migrations during slot updates.
- Instituted Rule 56: Semantic Consistency Over Simplicity to mandate execution of revisions in slot_fixes.yaml.
- Added new Genealogy Archives Registry Enrichment class with multilingual support and structured aliases.
2026-02-15 19:20:09 +01:00

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# Rule: Ontology Detection vs Heuristics
## Summary
When detecting classes and predicates in `data/ontology/` or external ontology files, you must **read the actual ontology definitions** (e.g., RDF, OWL, TTL files) to determine if a term is a Class or a Property. Do not rely on naming heuristics (like "Capitalized means Class").
## Detail
* **Verification**: Always read the source ontology file or use a semantic lookup tool to verify the `rdf:type` of an entity.
* If `rdf:type` is `owl:Class` or `rdfs:Class`, it is a **Class**.
* If `rdf:type` is `rdf:Property`, `owl:ObjectProperty`, or `owl:DatatypeProperty`, it is a **Property**.
* **Avoid Heuristics**: Do not assume that `skos:Concept` is a class just because it looks like one (it is), or that `schema:name` is a property just because it's lowercase. Many ontologies have inconsistent naming conventions (e.g., `schema:Person` vs `foaf:Person`).
* **Strictness**: If the ontology file is not available locally, attempt to fetch it or consult authoritative documentation before guessing.
## Violation Examples
* Assuming `ex:MyTerm` is a class because it starts with an uppercase letter without checking the `.ttl` file.
* Mapping a LinkML slot to `schema:Thing` (a Class) instead of a Property because you guessed based on the name.