Japan Aerospace Exploration Agency (JAXA) is operating Sentinel Asia with Asian Disaster Reduction Center (ADRC) and participating in International Charter to contribute to DRR (Disaster Risk Reduction) activities with disaster observation by satellites. International Charter is a framework of international space organizations, and aiming at providing observation data based on requests from designated organizations. 40－50 disasters were covered every year and the total number of the disaster observation until August 2016 has reacheed 500 since its establishment. Also cooperation between International Charter and Sentinel Asia is introduced.

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This paper proposes a method for document validation to authorize documents on the Internet to follow the standards of descriptive rules which have been established by an industrial organization or a consortium in the electronic component industry field. This method adopts SGML (Standard Generalized Markup Language) as a standard document format and newly introduces the datadictionaries and the content validation rules in order to represent the standards of descriptive rules. The datadictionaries stipulate standard technical terms. And the content validation rules stipulate the specification of document validation. Furthermore, this paper proposes a document content validation tool, a software which validates whether SGML documents follow the standards of descriptive rules by interpreting the content validation rules. Lastly the effectiveness of the method is evaluated through the experiments in the E-CALS (Electronics CALS) project. This evaluation shows that the method can promote reliable document sharing by circulating validated documents to the content descriptive rules.

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