JPH02207331A - expert system - Google Patents

Abstract

PURPOSE:To improve processing efficiency by providing a means, which retrieves data from a data base according to the circumstance of inference, and converts a form into the one usable for the inference. CONSTITUTION:A knowledge base supervising system 3 edits and infers the knowledge stored into a knowledge base 6 through a terminal 1, and a data base supervising system 5 edits and retrieves the data stored into a data base 7 through a terminal 2. A data converting program 4 delivers the key word of the data to the data base supervising system 5, when there are no data necessary for the inference in the knowledge base 6, retrieves the data from the data base 7, converts the retrieved data into those in the format usable for the inference, stores them into the knowledge base 6, and thus the inference is continued. Thus since it is unnecessary to always hold the large quantity of the data in the knowledge base, the inference processing efficiency can be improved.

Description

[Detailed description of the invention] [Industrial application field] The present invention applies when making inferences using a knowledge base.

The present invention relates to an inference data creation system suitable for searching and converting data used for inference from a database.

[Conventional technology]

The knowledge base used by expert systems for inference includes:
There are mainly two types of data: expert knowledge such as ``If A, then B'' and data representing facts.

Of these, data may be changed or added during inference execution. However, since the format of data that can be used for inference is fixed, it is necessary to store all the data that is considered necessary in advance in the knowledge base, or
As described in Japanese Patent No. 115533, when using a database, the format of the database is defined and used.

[Problem to be solved by the invention]

With the method of holding data in the knowledge base of an expert system as in the above-mentioned conventional technology, there is a problem that processing efficiency deteriorates when the amount of data increases. Furthermore, the method of specifying the database format has the problem that it cannot be applied to databases constructed without consideration of expert systems.

An object of the present invention is to provide an expert system that searches data necessary for inference from a database and converts it into a format that can be used in inference.

[Means to solve the problem]

The above object is achieved by providing a means between the knowledge base and the database to retrieve data from the database according to the inference situation and convert it into a format that can be used in inference.

[Effect]

The present invention operates to search for data necessary for inference and convert it into a format usable for inference, depending on the inference situation.

〔Example〕

An embodiment of the present invention will be specifically described below.

FIG. 1 shows an example of the configuration of the inference data creation method in this embodiment. The knowledge base management system 3 edits and infers knowledge stored in the knowledge base 6 via the terminal 1.

The database management system 5 edits and searches data stored in the database 7 via the terminal 2. The data conversion program 4 converts the data searched via the database management system 5 into a format that can be used for inference. Convert to

FIG. 2 shows a flowchart of an embodiment of the inference data creation method. In step 8, inference is performed using the knowledge stored in the knowledge base 6.

When it is determined in step 9 that the data necessary for inference is not in the knowledge base at the beginning or during the inference, in step 10 the keyword of the data is passed to the database management system 5 and searched from the database 7. The retrieved data is converted into a format usable for inference in step 11, and stored in the knowledge base 6 to continue inference.

〔Effect of the invention〕

According to the present invention, it is not necessary to always maintain a large amount of data in the knowledge base, which improves inference processing efficiency, and because the format of the database is not specified, the range of application of the system is expanded.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart of an inference data creation method. 1.2...terminal, 3...knowledge base management system,
4...Data conversion program, 5...Database management system, 6...Knowledge base, 7...Database. -21- Figure 1

Claims (1)

[Claims] 1. means for determining whether there is enough data necessary for the inference at the start of the inference or during the inference;
The present invention is characterized by comprising means for calling a database and performing a data search to acquire the necessary data when there is not enough data, and means for converting the acquired data into a format usable for the inference. expert system.