It is a case study of Open Data in Yokohama. case1:Yokohama Arts Foundation is to promote the YOKOHAMA ART LOD Project, data of more than 30,000 have been released as Linked Open Data. Case2:Open Data of Yokohama is progressing in a bottom-up approach by the local community. They are held several times a workshop such as ideathon, hackkahon, Wikipedia editthon, fieldwork using Open Data Apps. Open
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