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, http://www.iugonet.org
Atsuki SHINBORI , Satoru UeNo , Yuka SATO , Manabu YAGI , Akiyo YATAGAI
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
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
2.Complete shape of our
metadata is stored as ‘content’
on metadata level
Collaboration by using OpenSearch
Hurdle of the
IUGONET provide the analysis software.
Search of various observational data at 1 query
• 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
Link to the
The OpenSearch interface is opened also to the other applications.
Metadata Format & Customization Points
We defined the IUGONET common metadata format which is
based on the SPASE Data Model . 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.
 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
July 9th – 13th, 2012