API Reference > presentation-common > PresentationRules > ContentInstancesOfSpecificClassesSpecification ContentInstancesOfSpecificClassesSpecification Interface Creates content for ECInstance(s) of specified classes. Note: this specification doesn't rely on selection. It always returns instances no matter what the selection is, so pre-filtering should be done in ContentRule condition and ContentInstancesOfSpecificClassesSpecification.instanceFilter. Extends ContentSpecificationBase Properties Name Type Description arePolymorphic undefined | boolean Should all ContentInstancesOfSpecificClassesSpecification.classes be treated polymorphically. Deprecated classes MultiSchemaClassesSpecification | MultiSchemaClassesSpecification[] List of ECClass specifications whose ECInstances should be selected. handleInstancesPolymorphically undefined | boolean Should instances be queried using a polymorphic query - from classes and all their instanceFilter undefined | string Condition for filtering instances of defined classes. specType ContentInstancesOfSpecificClasses Used for serializing to JSON. Inherited properties Name Type Inherited from Description calculatedProperties undefined | CalculatedPropertiesSpecification[] ContentModifiersList Specifications for including calculated properties priority undefined | number ContentSpecificationBase Defines the order in which specifications are evaluated and executed. propertiesDisplay undefined | PropertiesDisplaySpecification[] ContentModifiersList Specifications for customizing property display by hiding / showing them propertyCategories undefined | PropertyCategorySpecification[] ContentModifiersList Specifications for custom categories. propertyEditors undefined | PropertyEditorsSpecification[] ContentModifiersList Specifications for assigning property editors propertyOverrides undefined | PropertySpecification[] ContentModifiersList Specifications for various property overrides. relatedInstances undefined | RelatedInstanceSpecification[] ContentSpecificationBase Specifications for joining related instances relatedProperties undefined | RelatedPropertiesSpecification[] ContentModifiersList Specifications for including properties of related instances showImages undefined | boolean ContentSpecificationBase Should each content record be assigned an image id Defined in presentation/common/src/rules/content/ContentInstancesOfSpecificClassesSpecification.ts Line 20 Last Updated: 13 June, 2024