The Japan Society for the Promotion of Science (JSPS, President: SATOMI Susumu) and the National Institute of Informatics (NII, Director General: KITSUREGAWA Masaru), have announced the public release of "Japan Data Catalog for the Humanities and Social Sciences" (JDCat), a system for searching research data in the humanities and social sciences. JDCat is a product of JSPS's Program for Constructing Data Infrastructure for the Humanities and Social Sciences (*1). It was created based on the repository software WEKO3 developed by the NII's Research Center for Open Science Infrastructure (*2) (RCOS, Center Director: YAMAJI Kazutsuna, Professor, NII Digital Content and Media Sciences Research Division), and it enables cross-disciplinary searches of data in a variety of humanities and social sciences publications by affiliated research institutions and that provides access to the published data of each institution.
Research data in fields of the humanities and social sciences are a means of capturing human activities and societal phenomena, and are used in various forms of societal decision-making, including policy formulation based on objective evidence. These data include individual data from social surveys, statistical tables from official statistics, texts of historical materials, image data, and many other types of data. In other countries, infrastructures are being actively developed to make data in the humanities and social sciences available to the public and share them with societies. JDCat is a cross-disciplinary search system for research data maintained at present by the five research institutions selected by JSPS via an open call for proposals. These are the Institute of Economic Research, Hitotsubashi University; Center for Social Research and Data Archives, Institute of Social Science, The University of Tokyo; Panel Data Research Center at Keio University; JGSS Research Center at Osaka University of Commerce; and Historiographical Institute, The University of Tokyo. At the time of this release, the JDCat system targets research data in the social sciences, with plans to add research data in the humanities around October this year.
The information used to describe the research data (metadata) handled by JDCat conforms to the Data Documentation Initiative (*3), an international standard in the social sciences. The system is designed to enable searches in both Japanese and English. In addition to general text searches, it supports advanced and faceted searches (*4). JDCat provides an intuitive and easy-to-use search environment for a wide range of users who are interested in research data in the humanities and social sciences. It is expected that the research data provided by this system will be utilized in various fields such as collaborative research, education, and policy planning.
Comments from HIROMATSU Takeshi, Director of JSPS's Center for Constructing Data Infrastructure for the Humanities and Social Sciences:
"JDCat is a data catalogue created by JSPS as a part of the Program for Constructing Data Infrastructure for the Humanities and Social Sciences. It gives open access to everyone. During past three years, preparatory works were carried out that laid the foundations for this launching of the JDCat system. They started with surveying the state of data archives in other countries and selecting and translating the controlled vocabulary in their metadata schema. Then, we decided what functions should be installed in JDCat, test-operated the system, and made refinements to it.
JDCat has four main operational objectives based on FAIR Date Principles (*5). These are (1) making it easy to identify data, (2) optimizing interoperability both in and outside Japan, (3) making possible access to Japan data in English, and (4) creating a data infrastructure that facilitates the automatic collection metadata from foreign countries. Technologically, these objectives are realized by (1) assigning digital object identifiers to data, (2) mapping the schema in the Data Documentation Initiative (DDI) and Japan Consortium for Open Access Repository (JPCOAR), (3) maintaining metadata in both Japanese and English, and (4) providing open access to metadata through "Creative Commons licenses zero" (CC0) (*6).
At the present stage, the information provided by JDCat covers only the above-described five research institutions, and its scope and types are limited. Both of data scope and types are expected to expand as the usership of the JDCat will increases. As one of staff members involved in this Program, I hope that "what is starting out as something small will be nurtured into something big", and it will have big impacts."
(*1) Program for Constructing Data Infrastructure for the Humanities and Social Sciences: