Municipalities and government agencies are producers of information that may be of interest to the public concerning areas such as population statistics, weather data and policy decisions. In the Digital Agenda, the Swedish Government emphasizes the importance for data to be spread and promotes the development and innovation of new e-services created by other parties than government agencies. Various development initiatives of platforms have been taken around the world but there are no specific standards regarding how data should be made public. Softronic currently offer their customers a proprietary platform for the publication of open data. In order to improve or alternatively replace this, Softronic wanted an evaluation of a number of already existing platforms. This report contains an evaluation of the Softronic platform along with three other candidates: CKAN, Socrata and OpenDataSoft. The included aspects in the evaluation were selected based on requests from Softronic, covering among other things the installation process, performance and upgrades. To assess the API function of the platforms and demonstrate how an application using open data can be implemented, a graphical client was developed. Socrata received the highest score in the evaluation, followed by in turn OpenDataSoft, CKAN and Softronic. Socrata is recommended as a platform for publishing open government data mainly because it offered extensive functionality, required few technical skills and provided plenty of support services. / Kommuner och myndigheter är producenter av information som kan vara av intresse för allmänheten gällande exempelvis befolkningsstatistik, väderdata och politiska beslut. I den digitala agendan verkar Sveriges regering för att data ska spridas och främja utveckling och innovation av nya e-tjänster skapade av andra aktörer än myndigheter. Diverse utvecklingsinitiativ har tagits kring plattformar runtom i världen men det finns inga tydliga standarder kring hur data ska göras publikt. Softronic erbjuder idag sina kunder en egenutvecklad plattform för publiceringen av öppna data. För att kunna förbättra eller alternativt ersätta denna, ville Softronic ha en utvärdering av ett antal redan existerande plattformar. Denna rapport innehåller en utvärdering av Softronics plattform tillsammans med tre andra kandidater: CKAN, Socrata och OpenDataSoft. De aspekter som utvärderingen innefattar valdes utifrån önskemål från Softronic och täcker bland annat installationsförfarande, prestanda och uppgraderingar. För att undersöka API-funktionen hos plattformarna och demonstrera hur en applikation som använder sig av öppna data kan implementeras, utvecklades även en grafisk klient. Socrata fick högst poäng i utvärderingen, följt av i tur och ordning OpenDataSoft, CKAN och Softronic. Socrata rekommenderas som en plattform för publicering av öppna myndighetsdata främst eftersom den erbjöd omfattande funktionalitet, krävde få tekniska färdigheter och tillhandahöll många supporttjänster.

In the last years, the number of freely available Linked and Open Data datasets has multiplied into tens of thousands. The numbers of applications taking advantage of it, however, have not. Thus, large portions of potentially valuable data remain unexploited and are inaccessible for lay users. Therefore the upfront investment in releasing data in the first place is hard to justify. The lack of applications needs to be addressed in order not to undermine efforts put into Linked and Open Data. In existing research, strong indicators can be found that the dearth of applications is due to a lack of pragmatic, working architectures supporting these applications and guiding developers. In this thesis, a new architecture for the integration and application of Linked and Open Data is presented. Fundamental design decisions are backed up by two studies: firstly, based on real-world Linked and Open Data samples, characteristic properties are identified. A key finding is the fact that large amounts of structured data display tabular structures, do not use clear licensing and involve multiple different file formats. Secondly, following on from that study, a comparison of storage choices in relevant query scenarios is made. It includes the de-facto standard storage choice in this domain, Triples Stores, as well as relational and NoSQL approaches. Results show significant performance deficiencies of some technologies in certain scenarios. Consequently, when integrating Linked and Open Data in scenarios with application-specific entities, the first choice of storage is relational databases. Combining these findings and related best practices of existing research, a prototype framework is implemented using Java 8 and Hibernate. As a proof-of-concept it is employed in an existing Linked and Open Data integration project. Thereby, it is shown that a best practice architectural component is introduced successfully, while development effort to implement specific program code can be simplified. Thus, the present work provides an important foundation for the development of semantic applications based on Linked and Open Data and potentially leads to a broader adoption of such applications.

The whole work is dealing with so-called. OpenData. Since this topic is very extensive, this paper focuses only on cataloging tools (catalogs) for open data. The main reason for this narrower focus is still great variability and new technologies that are of interest not only for the individuals or institutions but also for the whole public administration. For example at the beginning of this work none Czech national open data catalog existed, in the course of writing it managed to launch and now works almost flawlessly. Therefore, it is an important part of a retrospective view. The main objective of this work is to analyze the situation of the national catalogs of open data in selected locations, mapping the requirements of catalogs by avaible documents, creation of criteria and assessed according to criteria selected cataloging tool. Benefits include compiled criteria that can serve additional work or other purposes, and the aforementioned retrospective view. The structure of the work will be divided into several basic blocks, which can be summarized into the structure: Introduction, practical part, analytical part, conclusion. The introduction explains the reasons and aims of work and achievement. The practical part describes the past and present status issues. In the analytical part are assessed as suitable criteria / requirements that are applied to the selected tool. In the end everything is summed up.