Reference between indd and idml

Hi,

I have a question regarding to idml export.

If I have an indd document, and export it to idml, is there any reference between those 2 documents?

So if I export to idml and unzip it I have for example the story*.xml files. They have a 'Self' id. Does this, or any other id link with any id on the actual indd file or are they , regardless of the actual text and images, totally decoupled?

Kind regards

Edited typo