Abstract: Cargo cart 10 can be used independently or attached to a conventional walker 101. Cooperative attach means 40 connect cart 10 in front of walker 101 through roll leader 44, which propels and steers cart 10 in response to user's control of walker 101. In attached mode, rear wheels 34 of cart 10 are suspended above travel surface to allow cart 10 to be steered easily and predictably by roll leader 44. Cart 10 is attached and detached with one hand without tools. Handle 50 and optional cargo basket 29 fold flat for storage. Slots in peripheral rails 24 retain cargo that is wider than cargo support 28.

Abstract: Cargo cart 10 can be used independently or attached to a conventional walker 101. Cooperative attach means 40 connect cart 10 in front of walker 101 through roll leader 44, which propels and steers cart 10 in response to user's control of walker 101. In attached mode, rear wheels 34 of cart 10 are suspended above travel surface to allow cart 10 to be steered easily and predictably by roll leader 44. Cart 10 is attached and detached with one hand without tools. Handle 50 and optional cargo basket 29 fold flat for storage. Slots in peripheral rails 24 retain cargo that is wider than cargo support 28.

Abstract: Cargo cart 10 has front castors 32 and rear wheels 34 and can be used independently or attached to a conventional walker 101. Cart 100 includes a hitch 500 adjustable in height for selectively connecting cart 10 in front of walker 101 with rear wheels 34 off the ground such that walker 101 propels and steers cart 10 in response to user's control of walker 101.

Abstract: A system and method for model-driven development reduces the complexity of graphical models and permits the generation of code from both UML models and XML schemas. An intermediate model builder engine generates a standardized, intermediate model for input to a transformation model builder engine and creates a transformation model comprising a hierarchy of zero or more domains, technical categories, transformer element sets, transformer elements, and transformation model elements correlating transformers with elements of the intermediate model. A transformation engine uses the transformation model to carry out model transformations, and an output generation engine receives the output of the transformation engine to generate source code or other output.