Information management system and information management method

An information management system comprising:

• a first information storage configured to store at least one or more pieces of first attribute information that is attribute information of first information regarding a communication device;
• a second information storage configured to store at least one or more pieces of second attribute information that is attribute information of second information regarding the communication device;
• a related information storage configured to store related information that is information representing a relationship between the first attribute information and the second attribute information;
• a detector configured to detect update, addition, or deletion of the first attribute information or the second attribute information;
• and
• an updater configured to output a command for the update, addition, or deletion of the second attribute information associated with the first attribute information in the related information to the second information storage when the update, addition, or deletion of the first attribute information is detected, and to output the command for the update, addition, or deletion of the first attribute information associated with the second attribute information in the related information to the first information storage when the update, addition, or deletion of the second attribute information is detected,
• wherein each of the first information storage, the second information storage, the related information storage, the detector, and the updater is implemented by:
• i) computer executable instructions executed by at least one processor,
• ii) at least one circuitry or
• iii) a combination of computer executable instructions executed by at least one processor and at least one circuitry,
• wherein the first information is information regarding a route of the communication device, and the second information is information regarding a line,
• wherein a plurality of common identifiers are associated with a single piece of attribute information in the route information and a single piece of attribute information in the line information.