A method for accessing data in a data structure includes determining a node type of a first entry in a node array that defines a hierarchical relationship of a plurality of nodes in a markup language schema and determining based on the node type of the first entry whether the first entry includes an explicit size value. The stem is provided with a portion that can engage to a variable depth in a seat provided at the centre line of the structure, thus permitting at least two fixing positions, one extended and one retracted. At least one SMT component with two or more terminals is arranged between the printed circuit board and the package. A connection tube is connected to the rear cover and has a through hole so as to be connected with a spray gun. The regulating damper is disposed adjustably in the axial direction inside the pressure distribution pipe whereby the total aperture cross-section of the perforations per unit length varies in the axial direction of the pressure distribution pipe. The inventive mast track may also be configured to couple to an articulating sail feeder that bends and rotates freely, but limits the axial twist of the sail as during furling and reefing.