This paper is part of a series that focuses on DDI usage and how the metadata specification should be applied in a variety of settings by a variety of organizations and individuals. Support for this working paper series was provided by the authors' home institutions; by GESISLeibniz Institute for the Social Sciences; by Schloss Dagstuhl -Leibniz Center for Informatics; and by the DDI Alliance.
B Y A L E R K A M I N W I T H M I C H E L L E E D W A R D S , O L I V E R H O P T , J A N N I K J E N S E N , D A N K R I S T I A N S E N , O L O F O L S S O N A N D J O A C H I M W A C K E R O W
ABSTRACTQuestasy is a Web application developed to manage the dissemination of data and metadata for panel surveys. It was primarily developed for the LISS Data Archive, but was designed to be repurposed for other surveys. The structure of the application, from the underlying database to the generated Web pages, is based on DDI 3. This paper describes how Questasy was designed and implemented.
This paper is part of a series that focuses on DDI usage and how the metadata specification should be applied in a variety of settings by a variety of organizations and individuals. Support for this working paper series was provided by the authors' home institutions; by GESISLeibniz Institute for the Social Sciences; by Schloss Dagstuhl -Leibniz Center for Informatics; and by the DDI Alliance.By Larry Hoyle and Joachim Wackerow with Oliver Hopt
B Y L A R R Y H O Y L E A N D J O A C H I M W A C K E R O W W I T H O L I V E R H O P T
ABSTRACTIn many instances the only source of certain metadata may be in a file saved from some data analysis program. This is an exploration of what metadata can be harvested from several commonly used programs, and therefore by deduction what else is not available from these programs. These metadata elements are mapped into the appropriate DDI 3 structure.
The current usage of DDI is heterogeneous. It varies over different versions of DDI, different grouping, and unequal interpretation of elements. Therefore, provider of services based on DDI implement complex database models for each developed application, resulting in high costs and application specific and non-reusable models.
This paper shows a way to model the binding of DDI to applications in a way that it works independent of most version changes and interpretative differences in a standard like DDI without continuous reimplementation. Based on our DDI-FlatDB approach, shown first at EDDI 2015 & 2016, we present a complete implementation along the use case of a web-based questionnaire editor including sustainable solution for version management and efficient handling of large DDI structures. The user interface is adaptable to different usage scenarios to come. The application supports DDI-Lifecycle from the first question draft and hands over structured (meta-) data to survey institutes and data archives and supports the collaborative questionnaire development for the Pre-election Cross-Section of the German Longitudinal Election Study from early 2017 on.
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