Publish/Subscribe Over Virtual XML Data

XML has become the accepted data exchange language for a wide variety of application domains. In particular, a large number of telecom standards now involve passing a payload of XML data over a variety of protocols. For example, the scenarios mentioned (location, presence, device status etc.) above all involve passing that information via some standardized XML payload. In this position paper, we focus on using an XML subscription language over virtual data, which is categorized along the following dimensions based on an examination of various telecom scenarios: 1) subscription expiry, 2) subscription conditions, 3) notification semantics, 4) temporal characteristics, and 5) domain-specific functions