XML DTD for Roaming Access Phone Book

Abstract

This document defines the syntax as well as the semantics of the information to be included in the phone book for roaming applications. It comprises the information necessary to select the most appropriate ISP and to configure the host to get access to the network of the provider. The specification consists of a small set of required information elements and a variety of possible extensions. All data is specified in XML [5] (Extensible Markup Language) syntax leading to a concise XML DTD (Document Type Declaration) for the phone book.

Network Discovery and Selection Problem

“…For example, the XML DTD, described in [RFC3017], enables a client to select between potential points of attachment as Where all points of attachment within an access network enable authentication utilizing a set of realms, selection of an access network provides knowledge of the identities that a client can use to successfully authenticate. For example, in an access network, the set of supported realms corresponding to network name can be preconfigured.…”

“…3.5. Static Versus Dynamic Discovery "Phone-book" based approaches such as [RFC3017] can provide information for automatic selection decisions. While this approach has been applied to wireless access, it typically can only be used successfully within a single operator or limited roaming partner deployment.…”