Abstract: A method for processing queries for a document of elements is provided. The document includes a plurality of subsections where each subsection includes at least a portion of elements in the document. The method comprises: receiving a query for a path of elements in the document of elements; determining a plurality of step queries from the query, each step query including at least a part of the path of elements; for each step query in the plurality of step queries, determining one or more subsections that include elements that correspond to a step query; and determining at least one subsection that includes the path of elements of the query. A result for the query is generated using the at least one subsection.

Abstract: In an XML handling system, point updates to an element of an XML document stored in the database is possible. Updates include addition or deletion of whole documents, addition of a child node to any element node (this includes attribute nodes), the addition of new siblings to any element node, the deletion of any element node, and the replacement of any node by a new node. The database system might include a set of functions that can be invoked to affect an update (i.e., an addition, deletion or modification). Such updates can be submitted as queries, such as instructions within an XQuery query.

Abstract: A truck restraint has a carriage movable in a vertical direction along a track between a first lowered position and a second operative position. A fluid actuator moves the carriage along the truck between the first and second positions. The actuator is operable, with the hook in the first position, to cause relative rotation between the hook and the track so that the hook is moved from a downwardly inclined position to a generally horizontal position, prior to movement from the first position.

Abstract: A dock leveler has a support with a deck pivotally secured to the support at one end for movement between a stored position and an elevated position. A deck lip is pivotally connected to the deck assembly for movement between a pendant stored position and a bridging position projecting from said deck assembly. A lift mechanism acts on said deck assembly to lift it toward the elevated position and a lip operating mechanism operatively connected to the lip moves it from the pendant position to the bridging position. A latch holds the lip in the bridging position. The latch releases the lip upon relative movement between the lip and the deck assembly and has a yieldable connection to permit limited pivotal movement between said lip and said deck assembly upon application of a rearward force from a vehicle to allow the lip to move to an unlatched position.

Abstract: A scissor lift has a pair of leg assemblies pivotally connected to a base. Relative movement between the legs and the base is opposed by spring assemblies that may be selectively connected to a carriage to vary the bias on the legs. A cam member secured to the leg acts on the carriage to modify the motion between the leg and the carriage to maintain a uniform vertical spring rate.

Abstract: Apparatus for restraining movement of a parked vehicle away from a loading dock comprises an upwardly extending block which is movable from a lower position to an upper position which captures a portion of the parked vehicle to restrain movement of the parked vehicle away from the loading dock. This apparatus provides a safety lock system to ensure that during loading and unloading of a parked vehicle the vehicle cannot accidentally pull away from the loading dock which would result in injury to the forklift truck operator. A linkage mechanism is provided which provides for the raising and lowering of the block. A drive mechanism raises and lowers the linkage in determining the lower an upper positions of the block. The linkage comprises two spaced-apart linked arms which may be in the form of a parallelogram linkage arrangement.