Atmos Emc Metadata ,acl and paths on atmos

Hi,

I'm new at Atmos EMC, it is wanted me to use Atmos to store our file management system files.We use .Net technology as development environment, I use atmos-dotnet wrapper.It is easy to use but I have some questions about ACLs, Metadata and ObjectPaths.I want to understand exact purpose why we use ACLs, Metadata and ObjectPaths.I tried to find documents on site but links are broken I think.Is there anybody here to explain the purpose.Because to query an object we always use objectid, so why we need metadata etc.Is there a management interface to view files on atmos without using Atmos API ?, I have no idea.

Thanks.