A Level of Knowledge Graph Building for Efficient Requirements Definition

Abstract

In the initial stage of system development, the system engineer plans the budget, and period of time, and define the system requirements. In the case of a system that utilizes a knowledge graph, it is necessary to define the requirements of the knowledge graph and estimate the building cost. It is useful for system engineers, in particular, who do not have much experience in the building of knowledge graphs, to understand how much they need to build a knowledge graph for what they want to achieve and how much it costs to build it. However, it is not clear how much the knowledge graph should be constructed in order to realize what it wants to realize, and what requirements the knowledge graph should meet and the building costs for "What you want to achieve". In this paper, as a first step to improve the efficiency of system development utilizing knowledge graphs, we define the building level of knowledge graph and clarify "what it realizes" and "difficulty" for each level of knowledge graph. At first, we investigate the procedure of building a knowledge graph. After defining the level of knowledge graph, "what it realizes" and "difficulty" of the actual knowledge graph is shown.