In the last decade, many researchers have been attracted by information retrieval or information extraction from rapidly increasing text data, and they have also been motivated by efficient data management for a flood of texts. For this important but difficult problem, we would like to report a solution obtained by new compression technique intended to an intelligent information retrieval from huge data sets, and we also consider a possibility of new paradigm for extracting important associations beyond the ordinal keyword search.

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In performing patent retrieval, it is important to construct queries that cover relevant patents comprehensively because missing only one patent might bring enormous risk. Ironically, many critical patents are written in words such that the database retrieval cannot catch easily. Therefore, full-text retrieval has certain limitation even if the ability of database retrieval is improved. In this regard, to overcome this limitation, the practical use of patent classification system is needed. European Patent Classification (ECLA) is used as a tool for classifying not only European patents but also patents worldwide. It hasn't been long since ECLA became searchable in commercial databases so that ECLA has not been popular in Japan yet. However, ECLA can be regarded as a powerful tool not only for patent search for patents in European countries but also U.S. patent search especially. In this article, we'll explain the history of the establishment of ECLA and its framework, the relations with IPC (International Patent Classification) and future trend. Further we'll show the practical use of ECLA in patent searches.

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It is a national strategy for innovation to provide science & technology documents. With escalating cost of journal literature, as a developing country, China government has to ensure to provide literature services. This system is known and described as “National Science and Technology Digital Library” abbreviated as NSTL. This article describes full picture of NSTL from its positioning to the latest developments. Specifically, firstly, introduces the background of the founding NSTL including a strategic position and objectives. Secondly, is the body of this article, describes NSTL management system, the types of scientific and technical literature resources of NSTL, NSTL business systems, NSTL system construction and its services. Finally, gives the brief prospects.

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Since foreign magazines increases continued in recent years, the subscription magazine has decreased sharply. As the breakthrough, the subscription stop of the print products is carried out, an electronic journal is introduced, and it is striving for efficient use of information. However, an electronic journal also having a price increase every year, and switching it to method for obtaining of separates depending on future usage frequency is also assumed. About future utilization, there are many subjects also including utilization of open access, link resolver, etc.

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