Learning > presentation > customization > E C Expressions Edit this page ECExpressions Rule Condition Symbols available in Customization rule conditions: Symbol Type Value ParentNode Node context The parent NavNode expression context. ThisNode Node context NavNode expression context of the ECInstance that's currently being handled. this ECInstance context ECInstance expression context of the ECInstance that's currently being handled. Additionally, User Settings symbols are available as well. Override Value Symbols available in Customization rule override values: Symbol Type Value ThisNode Node context NavNode expression context of the ECInstance that's currently being handled. this ECInstance context ECInstance expression context of the ECInstance that's currently being handled. Additionally, User Settings symbols are available as well. Last Updated: 15 June, 2021