Abstract: A system that evaluates Boolean expressions receives a first set of Boolean expressions that include one or more Boolean expressions, and receives a second set of Boolean expressions that includes one or more Boolean expressions. The system determines one or more overlapping Boolean expressions between the first set and the second set. Each Boolean expression has a corresponding identifier and priority, and two or more Boolean expressions overlap when the Boolean expressions have an identical identifier. Each set of Boolean expressions includes a corresponding index.

Abstract: Systems and methods for manipulating dynamically rendered content are provided. At the outset, a first visual representation of backend data sources and a set of rules is generated. The first visual representation includes a structural overview of the backend data sources and the rules. A second visual representation of the backend data sources and the rules is also generated. The second visual representation includes an end-user rendering based on the backend data sources and the rules. A change to one of the backend data sources or rules is received within the first visual representation. Simultaneously, the change is rendered within the second visual representation.

Abstract: A system that evaluates Boolean expressions receives a first set of Boolean expressions that include one or more Boolean expressions, and receives a second set of Boolean expressions that includes one or more Boolean expressions. The system determines one or more overlapping Boolean expressions between the first set and the second set. Each Boolean expression has a corresponding identifier and priority, and two or more Boolean expressions overlap when the Boolean expressions have an identical identifier. Each set of Boolean expressions includes a corresponding index.

Abstract: Systems and methods for manipulating dynamically rendered content are provided. At the outset, a first visual representation of backend data sources and a set of rules is generated. The first visual representation includes a structural overview of the backend data sources and the rules. A second visual representation of the backend data sources and the rules is also generated. The second visual representation includes an end-user rendering based on the backend data sources and the rules. A change to one of the backend data sources or rules is received within the first visual representation. Simultaneously, the change is rendered within the second visual representation.

Abstract: A device arranged to be releasably mounting within a hole in a panel, e.g., a ceiling, to hold a lamp bulb and associated reflector or any other member therein. The device comprises a tubular body, a flange for engaging one side of the panel, and plural, equidistantly, peripherally-spaced, flexible arms for engaging the other side of the panel. Each arm extends outward from the body and is moveable from an extended position to a retracted position and vice versa. The arms are moved from the extended position to the retracted position when the body is pushed into the hole while being twisted about its longitudinal central axis in one rotational direction. The arms automatically move back to the extended position when the device is in place to hold the device securely within the hole. The device can be removed by pulling it out of the hole while twisting it about its longitudinal axis in the same rotational direction as used to insert it, whereupon the arms flex to the retracted position.

Abstract: A ratchet handle for use with socket wrenches includes a socket engaging projection on which socket wrenches having a first size of coupling socket can be mounted for turning by the handle. The handle includes a bar slidable within the projection and movable from a position within the projection to a second position with its end extending axially beyond the projection. Socket wrenches having a second and smaller size of coupling socket are mounted on the handle by engagement with the extended end of the bar. The bar is retained in either of two positions by spring pressed balls or detents which engage two shallow recesses in the projection in one position and in the extended position of the bar one of the detents lies outside the projection in position to engage a socket coupling mounted thereon. In another embodiment the bar is biased by a compression spring to its position within the projection and a cam on the bar urges a detent outwardly to retain the larger socket on the projection.

Abstract: A fluorescent lamp fixture has a pair of lamp socket assemblies which are normally retracted for shipment but which are pivoted outwardly for installation. The fixture comprises a channel member having a web with a pair of upstanding sidewalls and a pair of socket assemblies pivotally-mounted between the sidewalls. The sidewalls have aligned shaped apertures each with an entrance slot, and the base member has a pair of ear assemblies shaped to slide downwardly through the slots and into the apertures during assembly and to lock the socket assembly to the channel member when the socket assembly is pivoted through a predetermined angle. Cooperating latch assemblies are provided on the channel member and socket assembly for locking the socket assembly in its extended position. Closure plates are provided for the ends and top of the channel.