NeoLoad is able to handle some of the known parameters of an application. That means that he will be able to automatically detect and extract ID's that are dynamics.
But you may have to manually handle some of the parameters of your application. In that case you will create variable extractors.
A variable extractor can be moved to a framework parameter which is a kind of rule that can be stored and applied on your current script or any new recording.
The goal of the framework parameters is to let you create your own rule so when you make a new recording, all your dynamic values can be handled at once and automatically at the end of your recording.
You can see the default framework parameters under the menu "Edit-->Preferences-->Frameworks"