Hello Undral –
I believe the functionality you are looking for is an enhancement being introduced in the 10.3.1 product.
Let’s say you design a GeoEvent Service with a filter as illustrated below:
![](/legacyfs/online/91963_pastedImage_4.png)
In this example the GeoFence category is still specified as a constant String, AdminAreas. But the GeoFence name is dynamic: ${TrackID}. Notice the required decoration around the value indicating to GeoEvent that TrackID is the name of a field, not a literal string.
In this example, only GeoEvents whose TrackID attribute value matches the name of the GeoFence the event’s Geometry is found to be INSIDE will be allowed through the filter. Rather than a tcp-text-out you would use an output suitable for notification such as Send an Email.
Hope this information helps –
RJ