ProjectProperties.wdproperties how is this generated in a DC

hi to all ,

A file called ProjectProperties.wdproperties is found in the path src/packages/ of a DC , and it has references of the used dcs, and Logical Names of JCos if used any , this file is of type xml format, can any one please give more details like when is the file being generated and what is the use of this file in a DC .