A database system that accommodates any type of phenomenon or thing, with a simple table structure and an extremely small-scale program. Category identification information of the content to be registered, item names that represent an attribute and/or a function included in the category, and attributes of data representing the substantial contents of these items (item data attributes) are registered in each data cell of a data property table (21) in units of rows, and category identification information, title names, and substantial contents associated with each item are registered in data cells of a main data table (22) in units of rows. The item names of the table (21) and the substantial contents of the table (22) correspond by means of cell numbers, and when a database management system (10) performs data input, storage, searching, and output, the various methods are generated with row-direction data of the table (21) as a message.
A technology provides a function capable of passively utilizing a multiplicity of contents on networks. An information processing system includes a storage unit storing information, and a control unit. The control unit searches locating information for locating where data exists, and judges whether or not the data located by the locating information comes under a predetermined category. When the data is judged to come under the predetermined category, the storage unit stores the locating information and collects pieces of locating information for locating where the data exist.
