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JSON

Relationships : (GasFieldCollection/CriticalValves)

{"relationships": [{
 "id": 0,
 "name": "GSCriticalToCriticalSurvey",
 "backwardPathLabel": "GSValvesCritical",
 "originLayerId": 0,
 "originPrimaryKey": "ValveID",
 "forwardPathLabel": "GSCriticalSurvey",
 "destinationLayerId": 1,
 "originForeignKey": "ParentValveID",
 "rules": [],
 "cardinality": "esriRelCardinalityOneToMany",
 "attributed": false,
 "composite": false
}]}