Li Pan, Zhai Jun, Chen Yan
As a hot topic,Open Government Data provides a new way for promoting the construction of the transparent government and innovations between different social organizations.This paper designed and established a platform based on Drupal in order to resolve the problem about datasets metadata and data formats existing in open data portals of local government in China.Metadata providing can permit interoperability between different systems and the use of machine-readable,non-proprietary electronic data formats can reduce technical barriers to data access for users.Based on the basic analysis of the core functions of the platform,this paper introduced a common metadata standard DCAT,which was announced by W3C.Then the clear description was given to explain how to process mappings between DCAT vocabularies and fields of Drupal,which aimed to provide metadata for datasets.Publishing linked data is always difficult for the study of open data.There fore,the paper presented a simple solution on how to provide a Sparql endpoint for publishing data formats of linked datasets using Drupal.Finally,taking a dataset from Zhejiang government's Open data platform as an example to show the whole process about how this platform publishes datasets and provided machine-readable metadata formats.And this paper also made a detailed introduction about the important Drupal modules used in this platform,including RDFx module,Sparql endpoint module,DKAN related modules,which is a complimentary offering to CKAN with a full suite of cataloging,publishing and visualization features,and so on.This paper provided references for the construction and upgrading of all types of open data platform in our country.