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The attribute split calculation profile automatically calculates a new value for an attribute for the result features when a feature is split.

Profile variables

Variable name	Type	Description
`$map`	FeatureSetCollection	The list of layers in the web map. Can be used with the `FeatureSetByName` or `FeatureSetById` function to get a particular layer in the map. This can then be queried.
`$userId`	Text	The unique user ID of the editor who is logged into the application.
`$userName`	Text	The full name of the editor who is logged into the application.
`$userIdentity`	Text	Provides a credential instance. This can be used when accessing external layers with the `FeatureLayer` function. The credentials represent the user’s logged in credentials.
`$session`	Dictionary	A dictionary containing key value pairs. The dictionary contains all the session variables that have been configured in the app. When the application first launches, the user will be asked for values for the session variables. They can also (if configured) change session variables in the application. This provides programmatic access to the user’s choices / settings.
`$editingLayer`	FeatureSet	The layer to which `$feature` belongs to. Can be queried to find other records.
`$feature`	Feature	The feature that has been edited, added or worked on.
`$originalFeature`	Feature	The original version of the feature before it was edited. This is not available for all situations where scripting is run.
`$value`	Any	The value to test in the script. Certain rules, such as the restrict domain values rule, pass in a value for the current field value.
`$parentFeature`	Feature	If there is a geographic contains relationship for the current feature being edited, this variable will contain the parent (or containing feature).
`$routeFeature`	Feature	If the feature is a linear referencing feature, this variable will reference source route/line feature.
`$unchangedMap`	FeatureSetCollection	The list of layers in the web map with data as it was originally before the current editing operation began executing. This is not available for all situations where scripting is run.
`$onlyCausedByCracking`	Boolean	Boolean value to indicate that this feature has only been changed to add vertices to prevent slithers appearing.
`$splitParent`	Feature	When running a split operation, and the slip field rule is running, this will contain the original feature being split.
`$splitChildren`	FeatureSet	When running a split operation, this will contain all the child features that will be created from the split operation.

Return types

Date | Number | String | null
(depending on the type of field)

Example

Set field as a proportion of the parent:

/** Apportion totalAmount field, by the area of this child compared
 *  to the original parent feature
 */

return (
  ($splitParent.totalAmount * Area(Geometry($feature))) /
  Area(Geometry($splitParent))
);