Google Analytics creating custom variables from other custom variables using _setCustomVar
===

I am setting up some custom variables with Google Analytics using `_setCustomVar`. I have seen some documentation (_not official_) that uses the syntax `P1:P2:P3` to populate the value of a custom variable. I cannot find conclusive evidence in the Google Developers documentation that suggests that the value of `P1:P2:P3` will be a string concatenated copy of `Golf:Player:Scottish` - is this the case?

    _gaq.push(['_setCustomVar',
    3,                       	
    ‘P1',                 		
    ‘Golf’,       
    3                        
    ]);
    
    _gaq.push(['_setCustomVar',
    4,                       	
    ‘P2',                 		
    ‘Player’,       
    3                        
    ]);
    
    _gaq.push(['_setCustomVar',
    5,                       	
    ‘P3',                 		
    ‘Scottish’,       
    3                        
    ]);
    
    _gaq.push(
    ['_setAccount', 'UA-123456-1'],
    ['_setCustomVar', 1, 'Category', 'P1:P2:P3']
    );