A system and method for providing authored content to any of a plurality of requesting user network terminal devices, the method including specifying a feature-value set for the network terminal devices, the feature-value set having a set of selected device features, each feature with one or more discrete feature values. The method further includes annotating the authored content with markup information to provide a device-independent content, associating one or more of the device feature values with the requesting user network terminal device, and converting the device-independent content into a device-specific content adapted to the requesting user network terminal device. The system includes a network terminal device detector for receiving the network terminal device request, an origin server for providing device-independent content corresponding to the request, and a transformer for associating one or more device feature values with the requesting user network terminal device in the conversion of the device-independent content.