[Bakr]

It depends on how the developer created the code. ID is a very generic name, which isn't that great of practice on their end. It could mean an abundance of different things, to include house id, virtual world, interior, etc.

You can post the file lines (or database) that it uses and I may be able to help you decode it. Another option is to use another filterscript found on these forums (there is a ton!).