A Structure Hypertext Data Model and Its Formal Description

For its suitability for management of nonlinear information and flexible struc-ture.hypertext has a wide scope of application,but in the past,most of hypertext modelsor systems were used for management of non-engineering data.As engineering data is al-ways large in volume and entails much complicated management,there are many problemsto be solved before hypertext can be used for management of engineering data.This paperpresents HyVc,a Structure data model with a version node,which is more subitable formanagement of engineering data than ever before,and a structure node,which reduces thenumber of nodes within a hypertext network to make the structure clearer and easier fornavigation,and the enhanced knowledge presentation capability and dynamic retrievingcapability of the hypertext network as results of these new developments as well.