A method by which an application (22a 21a) on an origin server (22), or any other intermediary entity in an end-to-end network architecture connecting a client device (20) to a content provider entity, provides content to the client device (20) adapted to the client device (20) based on profile information regarding the client device (20), characterized by: the application (22a 21a) providing a request (M3' M3'') for the profile information and including in the request profile-reducing information for indicating only a subset of all the profile information; and a filter (22b' 21c) parsing the profile information based on the profile-reducing information, so as to provide as a response (M6' M6'') the indicated subset of all the profile information. The invention provides a document object module (DOM) filtering language (DFL) and corresponding application DFL parser (22b' 21c) for determining the reduced profile information, given an indication of what profile information is needed by the application (22a 21a).