... Previous: Astronomical Data Query Language: Simple Query Protocol for the Virtual Observatory . ... We developed the first prototype toward a Japanese Virtual Observatory (JVO) by using the Globus Tool Kit 2 (GTK2). ... As a result, the serious problem was partially resolved, and the elapsed time for a query reduced to about half of the previous one. ... The JVO portal interprets them and generates a "work-flow" by consulting the UDDI servers to find where available JVO services are registered. ...