The CodesignProvision Tag

When I select a provisioning profile from the GUI inside of Visual studio, it fills this tag in the csproj file with something like this:

<CodesignProvision>5451ACFD-A331-4509-5B7B-FGA97C5F1B56</CodesignProvision>

Where is this value coming from? In my automated teamcity build I have to specify a provisioning profile automatically, is it possible to obtain this value from the provisioning file itself? Can I put a path in here instead? Is there any documentation about this tag at all?

Thanks in advance.