September 19 – 24 , 2021, Event 21383

DDI – Cross Domain Integration (DDI-CDI): Application and Development


Arofan Gregory (Jaffrey, US)
Hilde Orten (NSD – Bergen, NO)
Joachim Wackerow (GESIS – Mannheim, DE)

For support, please contact

Heike Clemens


This workshop is intended to explore the possible applications of the DDI-CDI model in automating the integration of data from disparate sources and exploring the ways in which the model can be used to enhance the usability of data. Specific examples will be used to highlight and explore improved support in the model for different applications, ranging from typical data-harmonization scenarios to the application of machine learning and other AI techniques. The support provided for the model to describe the structural and semantic aspects of data will be one focus; another will be the application of the model (and its alignment with other related models) to issues of provenance and processing, to support the reproducibility of findings in research.

Workshop Goals

The workshop will focus on following areas:

  • Example applications of DDI-CDI with selected use cases
  • Usage with other specifications
  • Syntax representations of the model
  • Possible future extensions of the model

Introduction to the DDI-CDI Model

DDI-CDI is a new development in the realm of metadata standards. Rather than describing relevant metadata about a particular study, like most domain standards, it provides a tool for supplementing existing metadata with the information needed to connect to important data and metadata resources which surround it. The model allows for provenance and structure of data to be described across a range of formats and processes, and for individual data values to be tracked from their creation to the point of use. The model is designed to support machine-actionable replication and reproduction of data use, and to provide a full context to support reuse and sharing of data. To achieve this, it is designed to work easily with many other popular standards and models, including semantic vocabularies and generic technology specifications for data processing, dissemination, and cataloguing.

Interoperability, Sustainability, and Alignment with Other Standards

DDI - CDI is fundamentally a model which is intended to be implemented across a wide variety of technology platforms, and in combination with many other standards models, and specifications. To support this use, it is formalized using a limited subset of the Unified Modelling Language (UML). The model is provided in the form of Canonical XMI – an interchange format for UML models supported by many different modelling and development tools. Further, a syntax representation is provided in XML, so that direct implementation of the model is possible if needed.

The platform-independence of the model makes it more easily applicable across a broad range of applications and helps ensure that it will be sustainable even as the technology landscape evolves. DDI - CDI builds on many other standard models and is aligned with them where appropriate. This is shown in the model itself, where formalizations from other models and specifications are refined, extended, or directly used. The specification includes a description of what these other standards and models are, and how they are used in DDI - CDI.

Motivation text license
  Creative Commons BY 3.0 DE
  Joachim Wackerow

Event Series

Online Publications

We offer several possibilities to publish the results of your event. Please contact publishing(at) if you are interested.

Dagstuhl's Impact

Please inform us when a publication was published as a result from your seminar. These publications are listed in the category Dagstuhl's Impact and are presented on a special shelf in the library.