A theme's identity (the 2012 theme extension's themeFamily). Office matches themes by id, and the versions of one theme by vid.
themeFamily
A GUID in braces, the same for every version of the theme.
The family's name, such as Office Theme.
Office Theme
Optional
A GUID in braces naming this version.
A theme's identity (the 2012 theme extension's
themeFamily). Office matches themes by id, and the versions of one theme by vid.