Metadata Database for Upper Atmosphere by using DSpace
Yukinobu KOYAMA*1, Shuji ABE*2, Tomoaki HORI*3, Norio UMEMURA*3, Hi...
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Iugonet 20120710 poster


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Iugonet 20120710 poster

  1. 1. Metadata Database for Upper Atmosphere by using DSpace Yukinobu KOYAMA*1, Shuji ABE*2, Tomoaki HORI*3, Norio UMEMURA*3, Hiroo HAYASHI*1, Yoshimasa TANAKA*4, *1 *1 *4 *5 *1 / Atsuki SHINBORI , Satoru UeNo , Yuka SATO , Manabu YAGI , Akiyo YATAGAI *1 Issues & Solution of upper atmospheric research Kyoto Univ., *2 Kyushu Univ, *3 Nagoya Univ., *4 NIPR, *5 Tohoku Univ. Ideally, the metadata DB system which can deal with arbitrary metadata is the best but • default setting of DSpace is for Dublin Core metadata format, • IUGONET Common metadata format has deeper tree structure than Dublin Core metadata format. The integration analysis by using various kinds of observational data is necessity for investigating the mechanism of long-term variations in the upper atmosphere. However, there are no way to cross-search their DBs which are distributed over many research institutes in Japan. For resolving this inconvenience, we build the Metadata DB in order to cross-search their DBs. Therefore we gave up to handle complete shape of our metadata. Then we customized it according to following two rules. Issues: Global Observation Networks •Observational DBs are distributed. •To find out & collect many kinds of data is difficult. 1.Some search targets are chosen from the metadata, and are inserted into “metadatafieldregistry” table. 2.Complete shape of our metadata is stored as ‘content’ of DSpace. Combine DBs on metadata level Collaboration by using OpenSearch Hurdle of the interdisciplinary study IUGONET provide the analysis software.   Search of various observational data at 1 query   Metadata DB • Metadata which includes location information (e.g., URI) of observational data is sent to the analysis software via OpenSearch. •The analysis software downloads observational data by using the location information. Metadata DB Analysis Soft. Metadata DB (1a) Query (1b) Metadata (2a) Load (2b) Wget Observational DBs (2c) Data Customized DSpace-1.7.0 Observational Data Link to the Observational Data (3) Plot The OpenSearch interface is opened also to the other applications. Conclusion Metadata Format & Customization Points We defined the IUGONET common metadata format which is based on the SPASE Data Model [1]. Basically the metadata includes URI of observational data, start & end time of observation, spatial coverage of observation and so forth. • Built the Metadata DB for upper atmosphere by using DSpace. • Metadata files in XML is stored as ‘content’ of DSpace. • OpenSearch has been prepared and we implemented the procedure to connect from the data analysis software to the Metadata DB via OpenSearch interface. References [1] SPASE 2.0: a standard data model for space physics, Todd King, James Thieman and D. Aaron Roberts, Earth Science Informatics, 18650473 The 7th International Conference on Open Repositories Edinburgh, UK July 9th – 13th, 2012