When server-side functions are not involved, it is not necessary to build DAS in the data access. However, almost all the format handlers are building DAS in the current Hyrax data access. Performance-wise, this is trivial for DAS that are only involved a few variables. For the files that have many attributes, there is a performance burden. This ticket, we will try to resolve this by adding a BES add_attributes() method in the BESRequestHandler class so that the non-server-side functions don’t have to add DAS attributes.