Abstract: A method, computer program product, and system for a quality-of-service history database is described. A first input associated with a change to a component of a graphical user interface is received, wherein a portion of the component is represented as a first node of a tree structure representing a portion of the graphical user interface. A first characteristic of the change is determined. The first characteristic of the change is associated with a second node of the topic tree structure. The associated first characteristic is transmitted to a first computing device, wherein transmission of the associated first characteristic allows one or more of the first computing device and a second computing device to determine a first aspect of the change based upon, at least in part, the topic tree structure.

Abstract: A method, computer program product, and system for a quality-of-service history database is described. A first input associated with a change to a component of a graphical user interface is received, wherein a portion of the component is represented as a first node of a tree structure representing a portion of the graphical user interface. A first characteristic of the change is determined. The first characteristic of the change is associated with a second node of the topic tree structure. The associated first characteristic is transmitted to a first computing device, wherein transmission of the associated first characteristic allows one or more of the first computing device and a second computing device to determine a first aspect of the change based upon, at least in part, the topic tree structure.

Abstract: A steering device for steering a spaced axle trailer includes a pair of pivots connecting a tongue to a frame of the trailer. The steering device includes a primary arm pivotally connected to the trailer frame. The primary arm is coupled to pivotal spindle mechanisms on which the front trailer wheels are mounted to translate pivotal movement of the primary arm to the spindles, causing steering of the trailer. A mechanical surge brake device is connected to the tongue. A laterally movable element of the surge brake mechanism is attached to a hitch socket that fits over a hitch ball attached to a tow vehicle, so that the distance between the tow vehicle and the trailer is decreased slightly when the brakes of the tow vehicle are applied.