Abstract: According to one embodiment, an information processing method includes, based on a metamodel which is located in a first layer and in which a composition relationship and a reference relationship among plural types of information models located in a second layer are defined, creating a guide tree indicating a relationship between the information models. A data item (property) of data related to devices is defined in the information model. The guide tree indicates that an upper-layer first information model in which a relationship is indicated in the guide tree is able to use a data item defined in a lower-layer second information model.

Abstract: An instrument classification symbol specifying device includes a processor coupled to a memory. The processor acquires instrument information and a standardized information model. The processor specifies characteristics of an instrument on the basis of the instrument information. The processor determines an instrument classification symbol corresponding to the instrument on the basis of: determination information in which the characteristics of the instrument are associated with the instrument classification symbol, and the specified characteristics of the instrument. When the processor succeeds in specifying the characteristics of the instrument, the processor outputs a result of mapping between the instrument and the instrument classification symbol. When the processor has difficulty in specifying the characteristics of the instrument, the processor causes a display device to display candidates of the characteristics of the instrument.