Hello, pardon me for my bad english.
I made custom property panel element for searching, which consists of two types of inputs, first one for typing object’s name and searching. Second input is hidden and it’s main one for placing object’s id.
My problem is when i’m trying to export xml it generates my first input with object’s name. But i only need id of my found object.
My question is: how can i exclude one of input from final xml?
Please someone help me 
Can you explain what you’re trying to achieve and why a properties panel extension was the approach you chose?