Uniform Access to Astronomical Web Services and its Implementation in SkyMouse

With the progress of information technologies and astronomical observation technologies, as an example of cyber-infrastructure based sciences, the Virtual Observatory is initiated and spreaded quickly. More and more on-line accessible database systems and different kinds of services are available. Although astronomers have been aware the importance of interoperability, integrated access to the on-line information is still difficult. The SkyMouse is a smart system developed by Chinese Virtual Observatory project to let us access different online resource systems easily then ever. Not like some VO efforts on uniformed access systems, for example, NVO DataScope, SkyMouse tries to show a comprehensive overview for a specific object, but not to snatch as much data as possible. Stimulated by a simple Mouse Over on an interested object name, various VO-compliant and traditional databases, i.e. SIMBAD, NED, VizieR, DSS, ADS, are queried by the SkyMouse. An overview for the given object, including basic information, image, observation and references, is displayed in user's default web browser. In this article, we will introduce the framework of SkyMouse. During the development of the SkyMouse, various Web services will be called. In order to invoke these Web services, two problems must be solved, i.e. interoperability and performance. In the paper, a detailed description for these problems and our resolution are given.