Where is TFS 2010 Team Build Revision $(Rev:.r) Stored?

Question

TFS 2010 exposes a "Build Number Format" property, which contains $(BuildNumberDefinitionName) and $(Rev:.r) variables (among other things). Two and a half parts to my question:

1. What are all the available variables that can be used here?

2. Where does the value for $(Rev:.r) come from (where is it stored)?

   a. Can it be reset or changed?

Answer 1

Open a build definition, go process tab, find "Build Number Format" section and click "..." button at end of it. Here you will see a "Macros>>" button that contains all available variables. As far as I know $(Rev:.r) tells that it's Nth time that this definition has been run in a specific date. It is store in TFS internal database.