Techniques for executing database commands include receiving a database command that includes an XML component operation that operates on an XML construct that is based on a first set of one or more relational database constructs. In that case the diaphragm andor the counterelectrode each have at least two electrically mutually insulated segments. The web server computer generates a session file indicative of user status and the status of each of two or persons on a buddy list of the user. The method also includes forwarding a data transfer command within the packet from the first portion of the storage controller to a second portion of the storage controller. In addition, the reliability of the identification is increased, even when the occupant is out of position, by the provision of at least one reflector per seat in or on an allocated seat-belt. A quiescence instruction may be implemented to maintain reliability and scalability of the storage virtualization environment.