According to a first aspect of the present invention there is provided a method of operating an XML Document Management Server in an IP Multimedia Subsystem. The foldable type enables the lenses to fold outwards, inwards andor upwards. The patterns can be formed of interlaced sub-patterns andor scanned without adjacent spots being consecutively formed to reduce localized heating. The folding member can be used to cover an incising element that is attached to the balloon and positioned in the lumen of the tubular folding member. In the second position, the latching region is structured to capture the mounting structure therewithin.