API Reference > presentation-common > PresentationRules > ExtendedDataRule ExtendedDataRule Interface Rule used to inject some extended data into presentation data objects (nodes, records). A couple of typical use cases: Table is showing models and elements polymorphically and application wants to handle all models and all elements differently. The rule can be used to inject some flag that tells whether table row represents a model or an element. Tree shows a hierarchy of models and elements. Then element node is clicked, application needs to additionally know element model's ID. The rule can be used to inject that ID into element's node. Extends RuleBase ConditionContainer Properties Name Type Description condition undefined | string Defines a condition for the rule, which needs to be met in order for it to be used. items [key: string]: string A map of items that define the values stored in the extended data structure. ruleType ExtendedData Used for serializing to JSON. Inherited properties Name Type Inherited from Description onlyIfNotHandled undefined | boolean RuleBase Should this rule should be ignored if there is already an existing priority undefined | number RuleBase Defines the order in which presentation rules will be evaluated and executed. Defined in presentation/common/src/rules/customization/ExtendedDataRule.ts Line 25 Last Updated: 13 June, 2024