An image output apparatus and a camera each include a light source for illuminating an image recorded on a developed film drawn out from a loaded cartridge containing the developed film, an image reading device for reading information of the image through photoelectric conversion, and an image information output device for displaying the information of the image on an image display device. The technique involves methods for performing schema manipulating operations and for validating the schema changes so that the current XML documents remain valid against the new schema. The method includes identifying posts in a data store associated with the pages in the subset. Upon detection of the target analyte by the reagent deposit, the reading apparatus and the pyroelectric film may be used to detect the amount of heat that can be absorbed by the reagent deposit in response to irradiation. A dual rendering of the first and second volume images is displayed where one of the volume images can be seen through the other volume image.