Abstract
The global flow of information is being developed at unprecedented speed. However, users can not sufficiently utilize huge amount of information. Therefore, advanced utilization of contents of information are required. In order to realize such sophisticated utilization, it is necessary to understand meaning and characteristics of information. Therefore, the structuralization is required to represent various semantic relationships among information. In order to satisfy such requirement, we made systems for self organized knowledge resources and information retrieval based on semantic relationships. However, these systems can not make enough structuralized knowledge resources to realize sophisticated utilization. This paper reports problems which are classified and systematized at the method of an automatic extraction of hierarchical relationships which called SS-KWEJC because hierarchical relationships are the basis of semantic relationships in our concepts.
