Has event leaf node

@prefix omop: <https://w3id.org/omop/ontology/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix owlready: <http://www.lesfleursdunormal.fr/static/_downloads/owlready_ontology.owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

omop:has_event a owl:FunctionalProperty,
        owl:ObjectProperty ;
    rdfs:label "Has event"^^xsd:string ;
    owlready:python_name "event"^^xsd:string ;
    rdfs:comment "For Measurement: If the Measurement record is related to another record in the database, this field is the primary key of the linked record. Put the primary key of the linked record, if applicable, here."@en,
        "For Note: If the Note record is related to another record in the database, this field is the primary key of the linked record. Put the primary key of the linked record, if applicable, here."@en,
        "For Observation: If the Observation record is related to another record in the database, this field is the primary key of the linked record. Put the primary key of the linked record, if applicable, here. See the [ETL Conventions for the OBSERVATION](https://ohdsi.github.io/CommonDataModel/cdm54.html#observation) table for more details."@en ;
    rdfs:domain [ a owl:Class ;
            owl:unionOf ( omop:Cost omop:Measurement omop:Observation omop:Note ) ] ;
    omop:omop_cdm_name "cost.cost_event_id#284 AS Thing"^^xsd:string,
        "measurement.measurement_event_id#155 AS Thing"^^xsd:string,
        "note.note_event_id#199 AS Thing"^^xsd:string,
        "observation.observation_event_id#176 AS Thing"^^xsd:string .