This position paper deals with a formal system to manage sequential knowledge structure for Web site page analyses in a distributed system, by means of the rule-based state transition. Agent technology in AI (of modern approach), logic and database for relations between action and knowledge, process algebra and related logic with respect to distributed environments, and structural analyses (which may be static, interactive or constrained) of referential knowledge for Web site pages may be relevant, however, the present paper is concerned with the sequences like Web site page ones abstracted for a model of content retrievals through communications among sites via the internet. Awareness depending of states on the communications between sites may be adopted so that sequential knowledge acquisition and management would be possibly available.