Transparency in the public sector is one of the most important topics of the current debates on accountable, participatory, and responsive governance. An open government addresses these major topics and aims to encourage the relationships and flows of information between involved stakeholders. This article explores the role of open data portals in supporting these efforts and provides findings regarding the features in the design of these data infrastructures. On the basis of evidence from the concept of transparency-by-design, we argue that transparency is facilitated by open data portals and their features enabling to work with datasets. We therefore propose the list of the categories and corresponding features of open data portals that should constitute the checklist of the portal aiming to achieve the highest level of transparency. The mapping of existing features found in literature to the phases of the transparency cycle demonstrates that open data portals meet the transparency requirements.

公共部门的透明度是当前有关负责任，参与性和响应性治理的辩论中最重要的主题之一。开放的政府处理这些主要主题，旨在鼓励相关利益相关者之间的关系和信息流。本文探讨了开放数据门户在支持这些工作中的作用，并提供了有关这些数据基础结构设计中功能的发现。根据设计透明性概念的证据，我们认为开放数据门户及其功能可与数据集一起使用促进了透明性。因此，我们提出了开放数据门户网站的类别和相应功能的清单，这些清单应构成门户网站的清单，旨在实现最高的透明度。