data.dm in cell, which view type is depend on it?

Hi, 

    I am writing a design hierarchy analyser for data management, for example for check out, label or same check of design files. I will get all  files from a design hierarchy. Is there any exists function for that? In my code I am not sure, wenn should I add the data.dm of cell level to the list. Is there any list where is defined, which cell type is depend on the data.dm? Or I have add the data.dm for all layout type to the list?   Importent is the type schematic, symbol and layout. 

 best regards

Ke Yang