A computer program product is provided as a system for querying a repository of XML documents. The check command instructs to send information on whether the card supports a termination process in which the card shifts into a state ready for a stop of power supply from the host apparatus. The down leg has a rearward slope where is located a horizontal baffle. The DPDT technique enables analysts to customize the differentiation based on the quality of the measured data without having to use traditional, subjective smoothing algorithms. The customer contact processing computer transmits over the computer network the status indication for the selected agents from the storage unit to the customer computer. Among the plurality of regions into which the input image is divided, a region is extracted in which the ratio determined by the pixel number counting unit exceeds the first value, so that a specific region can be extracted accurately even if the values of pixels in the specific region to be extracted are scattered in a wide range.