Open data are freely available and can be used by every stakeholder for its own purposes. However, the practice demonstrates that it is important to ensure that the source from which they are available is usable and facilitates the re-use of data to the widest possible range of stakeholders. This task is carried out by open government data (OGD) portals. Therefore, this study proposes a multi-perspective approach where an OGD portal is analyzed from (1) citizens' perspective, (2) users' perspective, (3) experts' perspective, and (4) state of the art. By considering these perspectives, we can define how to improve the portal in question by focusing on its demand side. In view of the complexity of the analysis, we look for ways to simplify it by reusing data and knowledge on the subject, thereby proposing a knowledge-driven analysis that supports the idea under OGD – their reuse. Latvian open data portal is used as an example demonstrating how this analysis should be carried out, validating the proposed approach at the same time. We are aiming to find (1) the level of the citizens' awareness of the portal existence and its quality by means of the simple survey, (2) the key challenges that may negatively affect users' experience identified in the course of the usability analysis carried out by both users and experts, (3) combine these results with those already known from the external sources. These data serve as an input, while the output is the assessment of the current situation allowing defining corrective actions. Since the debates on the Latvian OGD portal serving as the use-case appear more frequently, this study also brings significant benefit at national level.

开放数据是免费提供的，每个利益相关者都可以将其用于自己的目的。然而，实践表明，重要的是确保提供数据的来源是可用的，并促进数据重用给尽可能广泛的利益相关者。此任务由开放政府数据 (OGD) 门户网站执行。因此，本研究提出了一种多视角方法，其中从 (1) 公民的角度、(2) 用户的角度、(3) 专家的角度和 (4) 最先进的角度分析 OGD 门户。通过考虑这些观点，我们可以定义如何通过关注其需求侧来改进相关门户。鉴于分析的复杂性，我们寻求通过重用有关该主题的数据和知识来简化分析的方法，从而提出了一种知识驱动的分析来支持 OGD 下的想法——它们的重用。以拉脱维亚开放数据门户为例，演示如何进行这种分析，同时验证所提议的方法。我们的目标是：（1）通过简单的调查发现公民对门户网站存在及其质量的认识水平，（2）在可用性分析过程中确定的可能对用户体验产生负面影响的主要挑战由用户和专家进行，(3) 将这些结果与从外部来源已知的结果结合起来。这些数据用作输入，而输出是对当前情况的评估，允许定义纠正措施。由于关于作为用例的拉脱维亚 OGD 门户的辩论出现得更频繁，