
This article provides terminology for the conceptual grid used in the Open Data and Re-use of Public Sector Information Act. It evaluates the terms “open data” and “re-use of public sector information”. It describes the relationship between these terms by analyzing the provisions of the Open Data Directive and the Act implementing it. The article evaluates negatively the legislator's use of the ordinary term “open data” in the title of the law. This also applies to the material scope of the Act as defined in Article 1. However, the use of this concept in the Act is justified from the perspective of the purposes of reuse and the values behind it. However, the term open data should not be used in the title.