> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ReverseConnectionContainerPropertyMissing validation rule

> Validates that the container property mapped from the view's direct connection property actually exists in the container.

This rule checks that the property in the container (mapped from the view's direct connection property)
actually exists in the container.

## Why it matters

The view property must map to an actual container property for data persistence.
If the container property doesn't exist, data cannot be stored.

## Example

If `WindTurbine.windFarm` maps to container property `WindTurbine.windFarm`,
but this container property doesn't exist, the connection cannot be stored.

## Further reading

* [Validation rules](/cdf/deploy/neat/validation/index)