I have two layers with a 1:many relationship. Working within ArcMap, I'd like to have that relationship somehow formalized so that when I add a new feature to the child layer, it automatically gets an attribute from the parent, so the link is automatically sustained.
For example, say I have a county layer and a site layer. Sites are all within Counties and I want that site layer to have an attribute that indicates which county each site is within. I want to be able to edit the site layer, adding a new polygon, and have that polygon automatically attributed with the county.
I thought for a moment that Relationship Classes in a File Geodatabase would do the trick... but I created the relationship class and tried adding a polygon to the site layer. The relationship field remained Null.
Seems like a common need that should have an existing method...?