For the compiled metadata of all polar sciences by PDC/NIPR, a software system that can automatically be attributing the Digital Object Identifier (DOI) are recently equipped inside the portal server. The DOIs shall be requested to the "DataCite (https://www.datacite.org/)" through the gateway interface provided by the "Japan Link Center (JaLC; https://japanlinkcenter.org/)". The JaLC is the only Japanese organization authorized as one of a Registration Agency (RA) which can provide the DOIs.

Under the adequate evaluation procedures, the metadata and their associated data having enough quality of publication procedure could be attributed their DOIs with a "prefix" of "10.17592". Under our DOI auto-numbering rule, the "suffix" part of the DOIs (i.e., the character string ordering) is generated arbitrary in a manner defined by the metadata portal of PDC/NIPR. The landing page of the data attributed by its DOI is initially oriented at the "English page" of the corresponding metadata in the PDC/NIPR portal server (http://scidbase.nipr.ac.jp/).

After receiving any offers from data providers/managers, quality of the individual data are strictly evaluated by the data management committee inside NIPR, followed by attributing their DOIs for those with sufficient revel of quality for opening/publishing the data into a public domain. There are several evaluation terms before assignment of the DOIs; regarding data quality, publishing methodology, long-term maintenance strategy, and their data policy, etc.; these evaluation terms should be overcome in both the description of the metadata itself and corresponding actual dataset.

Details are given here;
http://scidbase.nipr.ac.jp/modules/site/index.php?content_id=19

User mannual is revised for Ver.4.3:

For the purpose to prodide DOI via JaLC and to GCMD, restriction of the number of characters for each field of metadata is attributed in English page.

WDS-IPO 5th Anniversary celemony and lecture were beld on 6th Apr 2016 at TKP Ochanomizu Conference Hall, Tokyo.

Copy function of metadata is relearsed in he portal server.

DOI attribution fuction to the DataCite is released in the metedata portal server, via the JaLC interface system.