Open data is now a heavily discussed topic around the world and in the European Union. In the Czech Republic, open data is a term anchored in legislation, which includes the requirement of registration of all open data in the Czech National Open Data Portal (NODC). In this paper we describe the NODC, its architecture, dataset registration processes including the harvesting of Local Open Data Catalogs (LODCs), proprietary XML API and its obsolete dataset viewer. Next we describe the process of transformation of the NODC metadata to the DCAT-AP v1.1 RDF representation from the data model point of view and from the technical environment point of view. We describe the dataset quality measurements computed using the new data representation and its further impact on the Linked Open Data (LOD) environment including the harvesting of the metadata by the European Data Portal (EDP). Finally, we evaluate the data transformation and publishing environment from the usability, portability, availability and performance perspectives.

如今，开放数据已成为世界范围内以及欧盟范围内广泛讨论的话题。在捷克共和国，开放数据是法律中固定的术语，其中包括要求在捷克国家开放数据门户（NODC）中注册所有开放数据的要求。在本文中，我们描述了NODC，其体系结构，数据集注册过程，包括本地开放数据目录（LODC）的获取，专有XML API及其过时的数据集查看器。接下来，我们将从数据模型的角度和技术环境的角度描述将NODC元数据转换为DCAT-AP v1.1 RDF表示形式的过程。我们描述了使用新数据表示法计算出的数据集质量度量及其对链接开放数据（LOD）环境的进一步影响，包括欧洲数据门户网站（EDP）收集元数据。最后，我们从可用性，可移植性，可用性和性能的角度评估数据转换和发布环境。