VIRTUAL STRUCTURE RETRIEVAL SYSTEM IN HYPER TEXT SYSTEM

摘要

PURPOSE:To shorten the retrieval time of a virtual structure link and to efficiently execute retrieval. CONSTITUTION:When a node is updated, a retrieval node is checked and it is updated. When a retrieval condition is altered, the node retrieved by the condition is linked. Namely, the retrieval node is checked when the new node is added. The link is generated when the retrieval condition agrees. The retrieval node is checked when data on the existed node is altered and the link is updated by adjusting it to the retrieval condition. When the node is eliminated, the link is eliminated. When the retrieval condition of the retrieval node is altered, the link is updated in accordance with a retrieval result. Thus, subsequent wasteful retrieval is eliminated with such a processing and the virtual structure of efficient retrieval can be realized.