A catalog management system for executing a statement that accesses a catalog to manipulate referenced system or user-defined objects and related data. A service description describing a requested service is received. This configuration reduces parasitic capacitance resulting from an increase in the number of wirings. In variations, the current to the motor is limited by an analog current controller, and in other variations, current is limited by a digital current controller. This extended portion is then used to position an edge of a second mask, such that optical signal scatter caused by the extended portions of the waveguide are compensated for by adjusting the curvature. The invention also related to pharmaceutical compositions comprising such compounds, methods of treating cancer by the administration of such compositions, and processes for the preparation of the compounds.