[Data-modeling] What does "Type/Domain equivalent topic" mean ?

[Nguyen Minh Tuan]

Hi all,
It seems that I still not yet understand the data model of Freebase. I 
have just tried query freebase with "Person". I knew Person is a type, 
and there a lot of topic of this type like "Obama", "Paris Hilton". But, 
I found the topic "Person" (http://www.freebase.com/view/en/person) 
which is of type "Type/Domain equivalent topic". I understand the 
meaning of this topic, but It seems not logic for me, or I not yet 
understand.
So, according to this example, if there is a type "film" => there exist 
also a topic "film" equivalent the type ? and etc ...
According to the data dump (the smaller one, contains domain, type, and 
topic), and basic concept of freebase (About domain, type, topic, 
properties : 
http://www.freebase.com/view/guid/9202a8c04000641f8000000008c0c409), 
seems that has no concern this problem. Before, I think that a tsv file 
in dump-data is corresponding a type, but there is not type "Domain/type 
equivalent topic"
Could you correct me, please.
Thanks in advance.
Nguyen Minh Tuan