Staff

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Vita

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Research

Social science metadata specifications, development of DDI specifications.

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Publications

Publikation

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Journal article

Hartmann, Thomas, Benjamin Zapilko, Joachim Wackerow, and Kai Eckert. 2016. "Directing the Development of Constraint Languages by Checking Constraints on RDF Data." International Journal of Semantic Computing 2016 (10, 2): 193-217. doi: http://dx.doi.org/10.1142/S1793351X16400079.

Hoyle, Larry, and Joachim Wackerow. 2015. "DDI as a Common Format for Export and Import for Statistical Packages." IASSIST Quarterly 2015 (39, 3-4): 12-22. doi: http://dx.doi.org/10.29173/iq127.

Bosch, Thomas, Olof Olsson, Benjamin Zapilko, Arofan Gregory, and Joachim Wackerow. 2015. "DDI-RDF - A Discovery Model for Microdata." IASSIST Quarterly 38/39 (4/1): 17-24. doi: http://dx.doi.org/10.29173/iq897.

Vompras, Johanna, Arofan Gregory, Thomas Bosch, and Joachim Wackerow. 2015. "Scenarios for the DDI-RDF Discovery Vocabulary." DDI Working Paper Series. doi: http://dx.doi.org/10.3886/DDISemanticWeb02.

Hoyle, Larry, Louise Corti, Arofan Gregory, Agustina Martinez, Joachim Wackerow, Eirik Alvar, Noemi Cabrera, Damien Gallagher, Tobias Gebel, Jani Hautamaki, Arja Kuula, Steven McEachern, and Cornelia Züll. 2013. "A Qualitative Data Model for DDI." DDI Working Paper Series 2013. doi: http://dx.doi.org/10.3886/DDIWorkingPaper05.

Block, William, Thomas Bosch, Bryan Fitzpatrick, Daniel Gillman, Jay Greenfield, Arofan Gregory, Marcel Hebing, Larry Hoyle, Chuck Humphrey, Jon Johnson, Jenny Linnerud, Brigitte Mathiak, Steven McEachern, Olof Olsson, Barry Radler, Ørnulf Risnes, Dan Smith, Wendy Thomas, Joachim Wackerow, Dennis Wegener, and Wolfgang Zenk-Möltgen. 2012. "Developing a Model-Driven DDI Specification." DDI Working Paper Series. doi: http://dx.doi.org/10.3886/DDIWorkingPaper04.

Kramer, Stefan, Amber Leahey, Humphrey Southall, Johanna Vompras, and Joachim Wackerow. 2012. "Using RDF to Describe and Link Social Science Data to Related Resources on the Web." DDI Working Paper Series. doi: http://dx.doi.org/10.3886/ddisemanticweb01.

Hoyle, Larry, Fortunato Castillo, Benjamin Clark, Neeraj Kashyap, Denise Perpich, Joachim Wackerow, and Knut Wenzig. 2011. "Metadata for the Longitudinal Data Life Cycle." doi: http://dx.doi.org/10.3886/DDILongitudinal03.

Hoyle, Larry, Joachim Wackerow, and Oliver Hopt. 2010. "DDI 3: Extracting Metadata from the Data Analysis Workflow." DDI Working Paper Series 2010 (Use Cases, No. 4). doi: http://dx.doi.org/10.3886/DDIUseCases04.

Jaaskelainen, Taina, Meinhard Moschner, and Joachim Wackerow. 2009. "Controlled vocabularies for DDI 3: enhancing machine-actionability." IASSIST Quarterly Jg. 33, Nr. 1 + 2, Spring/Summer 34-39. doi: http://dx.doi.org/10.29173/iq649.

Dinkelmann, Karl, Pascal Heus, Chuck Humphrey, Jeremy Iverson, Jannik Jensen, Sigbjørn Revheim, and Joachim Wackerow. 2009. "High-Level Architectural Model for DDI Applications." DDI Working Paper Series. doi: http://dx.doi.org/10.3886/DDIBestPractices12.

Amin, Alerk, Michelle Edwards, Oliver Hopt, Jannik Jensen, Dan Kristiansen, Olof Olsson, and Joachim Wackerow. 2009. "Questasy: Documenting and Disseminating Longitudinal Data Online Using DDI 3." DDI Working Paper Series. doi: http://dx.doi.org/10.3886/DDIUseCases01.

Dinkelmann, Karl, Michelle Edwards, Jane Fry, Chuck Humphrey, Kirstine Kolsrud, Stefan Kramer, Jenny Linnerud, Hans Jørgen Marker, Meinhard Moschner, Ron Nakao, Wendy Thomas, Achim Wackerow, and Wolfgang Zenk-Möltgen. 2009. "Work flows - archival ingest and metadata enhancement." DDI Working Paper Series 13. doi: http://dx.doi.org/10.3886/DDIBestPractices03.

Marker, Hans Jørgen, Wolfgang Zenk-Möltgen, Wendy Thomas, and Achim Wackerow. 2009. "Workflows for metadata creation regarding recoding, aggregation and other data processing activities." DDI Working Paper Series 14. doi: http://dx.doi.org/10.3886/DDIBestPractices04.

Bohr, Jeanette, Andrea Janßen, and Joachim Wackerow. 2006. "Problems of Comparability in the German Microcensus Over Time and the New DDI Version 3.0." IASSIST Quarterly Spring 13-19. doi: http://dx.doi.org/10.29173/iq605.

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Contribution to edited volume

Bosch, Thomas, Benjamin Zapilko, Joachim Wackerow, and Kai Eckert. 2016. "Validating RDF Data Quality using Constraints to Direct the Development of Constraint Languages." In Proceedings of the 10th International Conference on Semantic Computing (ICSC 2016), doi: http://dx.doi.org/10.1109/ICSC.2016.43. http://ieeexplore.ieee.org/document/7439316/.

Wackerow, Joachim, and Mary Vardigan. 2013. "An established international metadata standard: The Data Documentation Initiative (DDI)." In Understanding research infrastructures in the social sciences, edited by Brian Kleiner, Isabelle Renschler, Boris Wernli, Peter Farago, and Dominique Joye, 158-167. Zürich: Seismo, Zürich.

Bosch, Thomas, Richard Cyganiak, Arofan Gregory, and Joachim Wackerow. 2013. "DDI-RDF Discovery Vocabulary: A Metadata Vocabulary for Documenting Research and Survey Data." In Proceedings of the 6th Workshop on Linked Data on the Web (LDOW 2013), 22nd International World Wide Web Conference (WWW 2013), http://ceur-ws.org/Vol-996/papers/ldow2013-paper-12.pdf.

Bosch, Thomas, Benjamin Zapilko, Joachim Wackerow, and Arofan Gregory. 2013. "Towards the discovery of person-level data: Reuse of vocabularies and related use cases." In Proceedings of the 1st International Workshop on Semantic Statistics (SemStats 2013) co-located with the 12th International Semantic Web Conference (ISWC 2013), CEUR Workshop Proceedings 1549. http://ceur-ws.org/Vol-1549/article-02.pdf.

Bosch, Thomas, Richard Cyganiak, Joachim Wackerow, and Benjamin Zapilko. 2012. "Leveraging the DDI model for linked statistical data in the social, behavioural, and economic sciences." In Proceedings of the International Conference on Dublin Core and Metadata Applications: DC-2012--The Kuching Proceedings, 46-55. https://dcpapers.dublincore.org/pubs/article/view/3654/0.html.

Mohler, Peter, Sue Ellen Hansen, Beth-Ellen Pennell, Wendy Thomas, Joachim Wackerow, and Frost Hubbard. 2010. "A Survey Process Quality Perspective on Documentation." In Survey methods in multinational, multiregional, and multicultural contexts, 299-314. Hoboken, NJ: Wiley. doi: http://dx.doi.org/10.1002/9780470609927.ch16.

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Editorship

Wackerow, Joachim, ed. 2016. IASSIST Quarterly: Guest editor for two articles on DDI: 'Towards Common Metadata Using GSIM and DDI 3.2', 'Open-access for existing LMIC demographic surveillance data using DDI'. 40, 2. https://iassistquarterly.com/index.php/iassist/issue/view/105.

Vardigan, Mary, and Joachim Wackerow, ed. 2015. IASSIST Quarterly, Special Issue on DDI. 39, 3. https://iassistquarterly.com/index.php/iassist/issue/view/28.

Vardigan, Mary, and Joachim Wackerow, ed. 2014. IASSIST Quarterly, Double Special Issue on DDI and Semantic Web. 38, 4 and 39, 1. https://iassistquarterly.com/index.php/iassist/issue/view/132.

Vardigan, Mary, and Joachim Wackerow, ed. 2009. IASSIST Quarterly, Double Special Issue on DDI. 33, 1-2. https://iassistquarterly.com/index.php/iassist/issue/view/74.

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Working and discussion paper

Wackerow, Joachim. 2021. A uniform resource name (URN) namespace for the data documentation initiative (DDI). Internet-Draft. IETF - Internet Engineering Task Force. https://datatracker.ietf.org/doc/draft-urn-ddi/.

Gregory, Arofan, Simon Hodson, and Joachim Wackerow. 2021. The role of DDI-CDI in EOSC: Possible uses and applications: EOSC project report. doi: http://dx.doi.org/10.5281/zenodo.4707263.

Bosch, Thomas, Benjamin Zapilko, Joachim Wackerow, and Kai Eckert. 2015. Constraints to Validate RDF Data Quality on Common Vocabularies in the Social, Behavioral, and Economic Sciences. Computing Research Repository (CoRR), abs/1504.04479. http://arxiv.org/abs/1504.04479.

Bosch, Thomas, Benjamin Zapilko, Joachim Wackerow, and Kai Eckert. 2015. Evaluating the Quality of RDF Data Sets on Common Vocabularies in the Social, Behavioral, and Economic Sciences. Computing Research Repository (CoRR), abs/1504.04478. http://arxiv.org/abs/1504.04478.

Kramer, Stefan, Amber Leahey, Humphrey Southall, Johanna Vompras, and Joachim Wackerow. 2012. Using RDF to Describe and Link Social Science Data to Related Resources on the Web. RatSWD Working Paper Series 207. http://www.ratswd.de/download/RatSWD_WP_2012/RatSWD_WP_207.pdf.

Kramer, Stefan, Anne Oechtering, and Joachim Wackerow. 2009. Data Documentation Initiative (DDI): Entwicklung eines Metadatenstandards für Forschungsdaten in den Sozialwissenschaften. KIM-Technology Watch Report. http://www.metadaten-twr.org/2009/09/07/data-documentation-initiative-ddi-entwicklung-eines-metadatenstandards-fur-numerische-daten-in-den-sozialwissenschaften/.

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Data/Software

Gillman, Daniel, Jay Greenfield, Arofan Gregory, Oliver Hopt, Larry Hoyle, Hilde Orten, Flavio Rizzolo, Wendy Thomas, and Joachim Wackerow. 2020. DDI Cross Domain Integration (DDI-CDI) Public Review (metadata specification). https://ddi-alliance.atlassian.net/wiki/spaces/DDI4/pages/860815393/DDI+Cross+Domain+Integration+DDI-CDI+Review.

Bosch, Thomas, Richard Cyganiak, Joachim Wackerow, and Benjamin Zapilko. 2015. DDI-RDF Discovery Vocabulary: A Vocabulary for Publishing Metadata about Data Sets (Research and Survey Data) into the Web of Linked Data: (Draft of metadata specification). http://rdf-vocabulary.ddialliance.org/discovery.html.

Gregory, Arofan, Wendy Thomas, Joachim Wackerow, Johan Fihn, Jeremy Iverson, Jon Johnson, and Dan Smith. 2014. Data Documentation Initiative (DDI) Technical Specification Version 3.2 (metadata specification). http://www.ddialliance.org/Specification/DDI-Lifecycle/3.2/.

Wackerow, Joachim, Larry Hoyle, and Thomas Bosch. 2014. Physical Data Description (PHDD): (Draft of metadata specification). http://rdf-vocabulary.ddialliance.org/phdd.html.

Talk

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Conference contribution

Bonino, Luiz Olavo, Arofan Gregory, Simon Hodson, and Joachim Wackerow. 2021. "The relationship of FAIR digital objects and metadata in the FAIR ecosystem: Questions and considerations from the DDI-CDI perspective." FAIR Festival 2021, online, 23.06.2021. doi: http://dx.doi.org/10.5281/zenodo.5116122.

Cox, Simon, Arofan Gregory, Simon Hodson, Steven McEachern, and Joachim Wackerow. 2020. "Connecting earth science data to the planet’s grand challenges." AGU Fall Meeting, 01.12.2020. https://agu.confex.com/agu/fm20/meetingapp.cgi/Paper/689070.

Wackerow, Joachim. 2020. "Generating DDI - Cross-Domain Integration (DDI-CDI) in the Language of your Choice (tutorial)." EDDI20 – 12th Annual European DDI User Conference, 30.11.2020. doi: http://dx.doi.org/10.5281/zenodo.4300365.

McEachern, Steven, and Joachim Wackerow. 2019. "DDI 4 - The Potential as a Metadata Standard for Cross-Domain Research Data." IASSIST 2019 : Data Down Under, 27.05.2019. doi: http://dx.doi.org/10.5281/zenodo.3612499.

Hoyle, Larry, and Joachim Wackerow. 2019. "DDI4 in R – New Possibilities Operations on Metadata." NADDI 2019, 25.04.2019. http://hdl.handle.net/1808/27778.

Wackerow, Joachim. 2019. "Generating DDI 4 in the Language of your Choice (tutorial)." EDDI19 – 11th Annual European DDI User Conference, 02.12.2019. doi: http://dx.doi.org/10.5281/zenodo.3596738.

Wackerow, Joachim, and Larry Hoyle. 2019. "Integrating Lifecycle Metadata into the R workflow - Implementing DDI4 in R." IASSIST 2019 : Data Down Under, 27.05.2019. doi: http://dx.doi.org/10.5281/zenodo.3612453.

Hoyle, Larry, and Joachim Wackerow. 2019. "Mapping DDI2 to DDI4." NADDI 2019, 25.04.2019. http://hdl.handle.net/1808/27779.

Wackerow, Joachim. 2019. "Results from the Second CODATA/DDI Workshop on Interoperability of Metadata Standards in Cross-Domain Science, Health, and Social Science Applications." GO BUILD Workshop on “Semantic Interoperability of Metadata for Cross-Domain Research of the Future”, 11.11.2019. https://www.go-fair.org/wp-content/uploads/2019/12/GO-BUILD-Workshop-2019-11-11-JoachimWackerow.pdf.

Cox, Simon, Simon Hodson, Lesley Wyborn, Phil Archer, Joachim Wackerow, and Steven McEachern. 2018. "Harmonising data description across the social and natural sciences." SciDataCon 2018, 05.11.2018. https://www.slideshare.net/drshorthair/harmonising-data-description-across-social-natural-sciences.

Hoyle, Larry, and Joachim Wackerow. 2018. "Implementing the DDI4 Model in the R Language." EDDI18 – 10th Annual European DDI User Conference, 04.12.2018. http://hdl.handle.net/1808/27451.

McEachern, Steven, Joachim Wackerow, Simon Cox, and Simon Hodson. 2018. "Interoperability of Metadata Standards in Cross-Domain Science, Health, and Social Science Applications." SciDataCon 2018, 05.11.2018. https://www.scidatacon.org/IDW2018/sessions/232/paper/748/.

Wackerow, Joachim, Ingo Barkow, William Block, Jay Greenfield, and Steven McEachern. 2017. "A Vision for a Future Research Infrastructure (session)." IASSIST 2017 - Data in the Middle: The common language of research, 23.05.2017.

Wackerow, Joachim. 2016. "DDI and Its Role in Modernizing Official Statistics." Sixth Session of the Statistical Commission of Organisation of Islamic Cooperation (OIC-StatCom). https://sesricdiag.blob.core.windows.net/sesric-site-blob/imgs/news/1517_PRESENTATION_OICSTATCOM6_S4_ARCHITECTURAL_DDI%20ALLIANCE.pdf.

Wackerow, Joachim. 2016. "Publishing DDI-Related Topics - Advantages and Challenges of Creating Publications." EDDI16 – 8th Annual European DDI User Conference. https://zenodo.org/record/259564.

Gregory, Arofan, Joachim Wackerow, Wendy Thomas, Barry Radler, Daniel Gillman, Mary Vardigan, and Jay Greenfield. 2015. "DDI Moving Forward: Progress on a new model-based DDI." IASSIST Conference 2015. http://iassist2015.pop.umn.edu/program/block7#a1.

Orten, Hilde, Knut Kalgraff Skjåk, Taina Jääskeläinen, Brita Dorer, and Joachim Wackerow. 2015. "Metadata across the survey lifecycle: a common metadata understanding for the three DASISH survey tools." 2015 International Workshop on Comparative Survey Design and Implementation (CSDI), City University London (UK)., 26.03.2015. https://csdiworkshop.org/wp-content/uploads/2020/04/DASISHsurveytools.pdf.

Wackerow, Joachim. 2014. "DDI Handbook - Overview and Examples of Recommended Best Practices." IASSIST Conference 2014. http://www.iassistdata.org/downloads/2014/2014_5p_wackerow.pdf.

Vardigan, Mary, Wendy Thomas, Arofan Gregory, and Joachim Wackerow. 2014. "Next-Generation DDI: Building Model-Based DDI 4." IASSIST Conference 2014. doi: http://dx.doi.org/10.5281/zenodo.3780809.

Wackerow, Joachim, and Thomas Bosch. 2014. "PHDD – An RDF Vocabulary for the Physical Data Description." North American Data Documentation Initiative Conference (NADDI) 2014. http://summit.sfu.ca/item/13948.

Bosch, Thomas, Richard Cyganiak, Arofan Gregory, and Joachim Wackerow. 2013. "DDI-RDF discovery vocabulary: a metadata vocabulary for documenting research and survey data." 6th Workshop on Linked Data on the Web (LDOW2013), 22nd International World Wide Web Conference (WWW 2013). http://de.slideshare.net/boschthomas/201305-ldow-2013-www-2013.

Bosch, Thomas, Benjamin Zapilko, Joachim Wackerow, and Arofan Gregory. 2013. "Towards the discovery of person-level data: reuse of vocabularies and related use cases." 1st International Workshop on Semantic Statistics (SemStats 2013) , 12th International Semantic Web Conference (ISWC 2013). http://de.slideshare.net/boschthomas/201310-semstats-2013-iswc-2013.

Wackerow, Joachim, and Hilde Orten. 2012. "A DDI resource package for the International Standard for Classification of Education (ISCED)." IASSIST Conference 2012. http://www.iassistdata.org/downloads/2012/2012_g1_wackerow_etal.pdf.

Wackerow, Joachim. 2012. "A machine-actionable processing chain for identifier, metadata and data." Workshop: Metadata and Persistent Identifiers for Social and Economic Data. http://www.ratswd.de/ver/docs_PID_2012/Wackerow_PID2012.pdf.

Gregory, Arofan, and Joachim Wackerow. 2012. "DDI Lifecycle and Qualitative Data: Development of a Formal Model." IASSIST Conference 2012. http://www.iassistdata.org/downloads/2012/2012_pkb_gregory_etal.pdf.

Orten, Hilde, and Joachim Wackerow. 2012. "DDI Resource Packages and How They Can Be Used in the Data Production Process." EDDI12 – 4th Annual European DDI User Conference. http://www.eddi-conferences.eu/ocs/index.php/eddi/eddi12/paper/view/27.

Olsson, Olof, Thomas Bosch, Benjamin Zapilko, Arofan Gregory, and Joachim Wackerow. 2012. "DDI-RDF - Trouble with Triples." IASSIST Conference 2012. http://www.iassistdata.org/downloads/2012/2012_b2_olsson.pdf.

Hoyle, Larry, and Joachim Wackerow. 2011. "DDI and the Lifecycle of Longitudinal Surveys." 4th Conference of the European Survey Research Association (ESRA). https://www.slideserve.com/knoton/ddi-and-the-lifecycle-of-longitudinal-surveys.

Hoyle, Larry, and Joachim Wackerow. 2011. "DDI as a Common Format for Export and Import from Statistical Packages." EDDI11 - 3rd Annual European DDI Users Group Meeting. http://www.ipsr.ku.edu/ksdata/DDI/DDI_as_aCommonFormatForTransport_2011_12_01.pptx.

Wackerow, Joachim. 2011. "DDI URN - Enabling identification and reuse of DDI metadata." Workshop: Persistent Identifiers for the Social Sciences. https://conference.iza.org/conference_files/PeIdSS2011/wackerow_j4483.pptx.

Wackerow, Joachim. 2011. "DDI3 Uniform Resource Names: locating and providing the related DDI3 objects." http://www.iassistdata.org/downloads/2010/2010_b4_wackerow.pdf.

Orten, Hilde, and Joachim Wackerow. 2011. "The ISCED Standard for Coding of Education and DDI-Lifecycle." EDDI11 - 3rd Annual European DDI Users Group Meeting. http://legacy.iza.org/conference_files/EDDI2011/call_for_papers/EDDI11%20C1%20-%20Hilde%20Orten%20-%20The%20ISCED%20Standard%20for%20Coding%20of%20Education%20and%20DDI-Lifecycle.pptx.

Moschner, Meinhard, Taina Jääsekläinen, and Joachim Wackerow. 2010. "Controlled vocabularies for DDI and other metadata structures - an update." EDDI10 - 2nd Annual European DDI Users Group Meeting. http://conference.iza.org/conference_files/eddi10/EDDI10_Presentations/EDDI10_B2_MeinhardMoschner_Slides.ppt.

Wackerow, Joachim. 2010. "Exanda - A Flexible On-Line Tabulation System Using DDI 3 (update)." IASSIST Conference 2010. http://www.iassistdata.org/downloads/2010/2010_b4_wackerow_2ndpaper.pdf.

Wackerow, Joachim. 2009. "Exanda." IASSIST Conference 2009. http://www.iassistdata.org/downloads/2009/a1_wackerow.pdf.

Granda, Peter, Joachim Wackerow, Meinhard Moschner, Wolfgang Zenk-Möltgen, and Mary Vardigan. 2009. "Managing the metadata life cycle: the future of DDI at GESIS and ICPSR." IASSIST Conference 2009. doi: http://dx.doi.org/10.5281/zenodo.3781967.

Hoyle, Larry, and Joachim Wackerow. 2008. "Exporting SAS Datasets to DDI 3 XML Files - Data, Metadata, and More Metadata." SAS Global Forum 2008. http://www2.sas.com/proceedings/forum2008/137-2008.pdf.

Wackerow, Joachim, and Larry Hoyle. 2008. "Poster on Exporting SAS Datasets to DDI 3 XML Files." 34th annual conference of the International Association for Social Science Information Services and Technology (IASSIST). http://www.ipsr.ku.edu/ksdata/sashttp/SGF2008/ConvertersFromSAStoDDI3.pdf.

Wackerow, Joachim. 2008. "Poster on The Data Documentation Initiative (DDI)." DC-2008 - DCMI International Conference on Dublin Core and Metadata Applications. http://dcpapers.dublincore.org/pubs/article/view/940.

Wackerow, Joachim. 2007. "Documenting, Maintaining, and Sharing Standard Variables with DDI Version 3.0: the ISCO example." IASSIST Conference 2007. http://www.iassistdata.org/downloads/2007/e4_wackerow.pdf.

Göbel, Jan, and Joachim Wackerow. 2007. "New Frontiers: Can Panel Studies Go DDI? First Experiences in documenting the German Socio-Economic Panel Study with DDI 3.0." IASSIST Conference 2007. doi: http://dx.doi.org/10.5281/zenodo.3782987.

Janssen, Andrea, Jeanette Bohr, and Joachim Wackerow. 2006. "Microdata Information System MISSY." IASSIST Conference 2006. doi: http://dx.doi.org/10.5281/zenodo.3783097.

Bohr, Jeanette, Andrea Janßen, and Joachim Wackerow. 2006. "Problems of comparability in the German Microcensus over time and the new DDI version 3.0." International Association for Social Sciences Information Service & Technology (IASSIST), 25.05.2006. doi: http://dx.doi.org/10.5281/zenodo.3783119.

Expertise and review

Wackerow, Joachim. 2016. "SemStats 2016 - 4th International Workshop on Semantic Statistics co-located with the 15th International Semantic Web Conference (ISWC 2016)." http://semstats.org/2016/.

Wackerow, Joachim. 2014. "Journal of Official Statistics." https://www.degruyter.com/view/j/jos.

Wackerow, Joachim. 2014. "SemStats 2014 - 2nd International Workshop on Semantic Statistics co-located with the 13th International Semantic Web Conference (ISWC 2014)." http://semstats.org/2014/.

Wackerow, Joachim. 2013. "SemStats 2013 - 1st International Workshop on Semantic Statistics co-located with the 12th International Semantic Web Conference (ISWC 2013)." http://semstats.org/2013/.

Organisation

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Event

Alter, George, Arofan Gregory, Joachim Wackerow, and Simon Hodson. 2021. "Aligning Provenance Approaches Across Domains." RDA's 17th Plenary Meeting, online, 21.04.2021. https://www.rd-alliance.org/aligning-provenance-approaches-across-domains.

Gregory, Arofan, Simon Hodson, Hilde Orten, and Joachim Wackerow. 2021. "Workshop: DDI Cross Domain Integration for FAIR Data Sharing across Discipline Boundaries." Schloss Dagstuhl – Leibniz Center for Informatics, 19.09.2021 - 24.09.2021. https://www.dagstuhl.de/21383.

Gregory, Arofan, Simon Hodson, Hilde Orten, and Joachim Wackerow. 2021. "Workshop: Interoperability for Cross-Domain Research: Use Cases for Metadata Standards." Schloss Dagstuhl – Leibniz Center for Informatics, 26.09.2021 - 01.10.2021. https://www.dagstuhl.de/21393.

Askitas, Nikos, Alina Danciu, Marie Darcimoles, Uwe Jensen, Jon Johnson, Mari Kleemola, Nicolas Sauger, Amélie Vairelles, Joachim Wackerow, Knut Wenzig, and Wolfgang Zenk-Möltgen. 2020. "EDDI20 – 12th Annual European DDI User Conference - held as Virtual Cf. - Hosts: Sciences Po, Center for Socio-Political Data (CDSP), CNRS, Paris: Co-chairs: Jon Johnson and Mari Kleemola." 01.12.2020 - 02.12.2020. https://www.eddi-conferences.eu/eddi-2020/.

Alaterä, Tuomas J., Nikos Askitas, Alina Danciu, Uwe Jensen, Jon Johnson, Mari Kleemola, Mikko Saloila, Joachim Wackerow, Knut Wenzig, and Wolfgang Zenk-Möltgen. 2019. "EDDI19 – 11th Annual European DDI User Conference - hosted by Finnish Social Science Data Archive, Tampere University, and Statistics Finland: Co-chairs: Jon Johnson and Mari Kleemola." Tampere University, Tampere, 03.12.2019 - 04.12.2019. https://www.eddi-conferences.eu/eddi-2019/.

Gregory, Arofan, Hilde Orten, and Joachim Wackerow. 2019. "Workshop: DDI 4 Core - Development of a Robust and Sustainable Model." Schloss Dagstuhl – Leibniz Center for Informatics, 29.09.2019 - 04.10.2019. https://www.dagstuhl.de/19403.

Cox, Simon, Arofan Gregory, Simon Hodson, Steven McEachern, and Joachim Wackerow. 2019. "Workshop: Interoperability of Metadata Standards in Cross-Domain Science, Health, and Social Science Applications II." Schloss Dagstuhl – Leibniz Center for Informatics, 06.10.2019 - 11.10.2019. https://www.dagstuhl.de/19413.

Askitas, Nikos, Alina Danciu, Andreas Franken, Uwe Jensen, Jon Johnson, Mari Kleemola, Christine Kurka, Mikko Saloila, Joachim Wackerow, Knut Wenzig, and Wolfgang Zenk-Möltgen. 2018. "EDDI18 – 10th Annual European DDI User Conference: Co-chairs Jon Johnson and Joachim Wackerow." SOEP – The Socio-Economic Panel, DIW – German Institute of Economic Research, Berlin, 04.12.2018 - 05.12.2018. https://www.eddi-conferences.eu/eddi-2018/.

Wackerow, Joachim, Barry Radler, Wendy Thomas, Jay Greenfield, and Steven McEachern. 2018. "Session: DDI - Current products, future developments, and strategic directions." IASSIST Conference 2018, 30.05.2018 - 30.05.2018.

Johnson, Jon, Dan Smith, Wendy Thomas, and Joachim Wackerow. 2018. "Workshop: Data Documentation Initiative (DDI) - Train the Trainers." 24.09.2018 - 28.09.2018. https://www.dagstuhl.de/18393.

Cox, Simon, Simon Hodson, Steven McEachern, and Joachim Wackerow. 2018. "Workshop: Interoperability of Metadata Standards in Cross-Domain Science, Health, and Social Science Applications." Schloss Dagstuhl – Leibniz Center for Informatics, 01.10.2018 - 05.10.2018. https://www.dagstuhl.de/18403.

Askitas, Nikos, Denise Bloch, Stefan Buerli, Uwe Jensen, Jon Johnson, Mari Kleemola, Brian Kleiner, Mikko Saloila, Monika Vettovaglia, Joachim Wackerow, Knut Wenzig, and Wolfgang Zenk-Möltgen. 2017. "EDDI17 – 9th Annual European DDI User Conference: Co-chairs Jon Johnson and Joachim Wackerow." FORS – Swiss Centre of Expertise in the Social Sciences, Lausanne, 05.12.2017 - 06.12.2017. https://www.eddi-conferences.eu/eddi-2017/.

Chatain, Kelly, Larry Hoyle, Jon Johnson, Steven McEachern, Wendy Thomas, and Joachim Wackerow. 2017. "Workshop: DDI Moving Forward: Integration of Core Components / DDI-based Infrastructure Vision." Schloss Dagstuhl – Leibniz Center for Informatics, 22.10.2017 - 27.10.2017. http://www.dagstuhl.de/17433.

Chatain, Kelly, Larry Hoyle, Jon Johnson, Wendy Thomas, and Joachim Wackerow. 2017. "Workshop: DDI Moving Forward: Production Framework and Bindings." Schloss Dagstuhl – Leibniz Center for Informatics, 15.10.2017 - 20.10.2017. http://www.dagstuhl.de/17423.

Askitas, Nikos, Kerrin Borschewski, Uwe Jensen, Jon Johnson, Mari Kleemola, Mogens Grosen Nielsen, Eric van Um, Joachim Wackerow, Knut Wenzig, Ulrike Weyerke, and Wolfgang Zenk-Möltgen. 2016. "EDDI16 – 8th Annual European DDI User Conference: Co-chairs Jon Johnson and Joachim Wackerow." GESIS - Institute for the Social Sciences, Cologne, 06.12.2016 - 07.12.2016. https://www.eddi-conferences.eu/eddi-2016/.

Wackerow, Joachim. 2016. "Session: The Role and Benefit of Metadata Capture, Discovery and Harmonization in Survey Research." 5th Biennial ACSPRI Social Science Methodology Conference. https://conference.acspri.org.au/index.php/conf/conference2016/schedConf/presentations.

Gregory, Arofan, Jared Lyle, Steven McEachern, Wendy Thomas, Joachim Wackerow, and Benjamin Zapilko. 2016. "Workshop: DDI Moving Forward: Facilitating Interoperability and Collaboration with Other Metadata Standards: Facilitating Interoperability and Collaboration with Other Metadata Standards." Schloss Dagstuhl – Leibniz Center for Informatics, 16.10.2016 - 21.10.2016. http://www.dagstuhl.de/16423.

Edwards, Michelle, Arofan Gregory, Wendy Thomas, and Joachim Wackerow. 2016. "Workshop: DDI Moving Forward: Improvement and Refinement of Selected Areas." Schloss Dagstuhl – Leibniz Center for Informatics, 23.10.2016 - 28.10.2016. http://www.dagstuhl.de/16433.

Askitas, Nikos, Anne Sofie Fink, Denis Grofils, Jannik Vestergaard Jensen, Jon Johnson, Mogens Grosen Nielsen, Christian Lindgaard Olesen, Diana Ransgaard Sørensen, Joachim Wackerow, Catharina Wasner, Knut Wenzig, and Wolfgang Zenk-Möltgen. 2015. "EDDI15 – 7th Annual European DDI User Conference (chair Joachim Wackerow)." DST – Statistics Denmark, Copenhagen, 02.12.2015 - 03.12.2015. https://www.eddi-conferences.eu/eddi-2015/.

Johnson, Jon, and Joachim Wackerow. 2015. "Session: Recent developments in survey metadata capture, discovery and harmonisation." ESRA 2015: 6th Conference of the European Survey Research Association, Reykjavik, 16.07.2015.

Gregory, Arofan, Wendy Thomas, Mary Vardigan, and Joachim Wackerow. 2015. "Workshop: DDI Moving Forward: Facilitating Interoperability and Collaboration with Other Metadata Standards." Schloss Dagstuhl – Leibniz Center for Informatics, 18.10.2015 - 23.10.2015. http://www.dagstuhl.de/15433.

Askitas, Nikos, Tito Castillo, Johan Fihn, Jon Johnson, Emma Melissa, Jonathan Tebbett, Joachim Wackerow, Catharina Wasner, and Wolfgang Zenk-Möltgen. 2014. "EDDI14 - 6th Annual European DDI User Conference (chair Joachim Wackerow)." IOE – Institute of Education, London, 02.12.2014 - 03.12.2014. https://www.eddi-conferences.eu/eddi-2014/.

Gregory, Arofan, Larry Hoyle, Wendy Thomas, Mary Vardigan, and Joachim Wackerow. 2014. "Workshop: DDI Lifecycle: Moving Forward." Schloss Dagstuhl – Leibniz Center for Informatics, 19.10.2014 - 24.10.2014. http://www.dagstuhl.de/14432.

Wackerow, Joachim, Nikos Askitas, Raphaelle Fleureux, Roxane Silberman, Amélie Vairelles, and Catharina Wasner. 2013. "EDDI13 - 5th Annual European DDI User Conference (chair Joachim Wackerow)." Réseau Quetelet, Paris, 03.12.2013 - 04.12.2013. https://www.eddi-conferences.eu/eddi-2013/.

Gregory, Arofan, Wendy Thomas, Mary Vardigan, and Joachim Wackerow. 2013. "Workshop: DDI Lifecycle: Moving Forward." Schloss Dagstuhl – Leibniz Center for Informatics. http://www.dagstuhl.de/13442.

Askitas, Nikos, Ørnulf Risnes, and Joachim Wackerow. 2012. "EDDI12 - 4th Annual European DDI User Conference (chair Joachim Wackerow)." NSD – Norwegian Social Science Data Services, Bergen, 03.12.2012 - 04.12.2012. https://www.eddi-conferences.eu/eddi-2012/.

Wackerow, Joachim. 2012. "Session on the role of structured metadata in cross-national surveys." RC33 Eighth International Conference on Social Science Methodology. http://conference.acspri.org.au/index.php/rc33/2012/index.

Gregory, Arofan, Wendy Thomas, Mary Vardigan, and Joachim Wackerow. 2012. "Workshop: DDI Lifecycle: Moving Forward." Schloss Dagstuhl – Leibniz Center for Informatics, 21.10.2012 - 26.10.2012. https://www.dagstuhl.de/12432.

Cyganiak, Richard, Arofan Gregory, Wendy Thomas, and Joachim Wackerow. 2012. "Workshop: Semantic Statistics for Social, Behavioural, and Economic Sciences: Leveraging the DDI Model for the Linked Data Web." Schloss Dagstuhl – Leibniz Center for Informatics, 14.10.2012 - 19.10.2012. http://www.dagstuhl.de/12422.

Askitas, Nikos, Michelle Coldrey, Hans Jørgen Marker, Joachim Wackerow, and Olof Olsson. 2011. "EDDI11 - 3rd Annual European DDI Users Group Meeting (chair Joachim Wackerow)." SND – Swedish National Data Service, Gothenburg, 05.12.2011 - 06.12.2011. https://www.eddi-conferences.eu/eddi-2011/.

Wackerow, Joachim. 2011. "Session: The role and benefit of structured metadata in survey research." 4th Conference of the European Survey Research Association (ESRA). http://www.europeansurveyresearch.org/conferences/lausanne-2011.

Gregory, Arofan, and Joachim Wackerow. 2011. "Triple session: Recent Developments in the DDI Implementation Landscape." IASSIST Conference 2011. http://www.iassistdata.org/downloads/2011/2011_a1_gregory.pdf.

Gregory, Arofan, Wendy Thomas, and Joachim Wackerow. 2011. "Workshop: DDI: Managing Metadata for Longitudinal Data - Best Practices." Schloss Dagstuhl – Leibniz Center for Informatics, 18.09.2011 - 23.09.2011. http://www.dagstuhl.de/11382.

Cyganiak, Richard, Arofan Gregory, Wendy Thomas, and Joachim Wackerow. 2011. "Workshop: Semantic Statistics for Social, Behavioural, and Economic Sciences: Leveraging the DDI Model for the Web." Schloss Dagstuhl – Leibniz Center for Informatics, 11.09.2011 - 16.09.2011. http://www.dagstuhl.de/11372.

Askitas, Nikos, Eric Balster, John Doove, Rob Grim, Laurents Sesink, and Joachim Wackerow. 2010. "EDDI10 - 2nd Annual European DDI Users Group Meeting (chair Joachim Wackerow)." SURF, Utrecht, 08.12.2010 - 09.12.2010. http://legacy.iza.org/conference_files/eddi10/call_for_papers.

Gregory, Arofan, Mary Vardigan, and Joachim Wackerow. 2010. "Workshop: The Data Documentation Initiative (DDI) Standard: Managing Metadata for Longitudinal Data - Best Practices." Schloss Dagstuhl – Leibniz Center for Informatics, 17.10.2010 - 22.10.2010. http://www.dagstuhl.de/10422.

Askitas, Nikos, Georgios Tassoukis, and Joachim Wackerow. 2009. "EDDI09 - 1st Annual European DDI Users Group Meeting (co-chairs Nikos Askitas and Joachim Wackerow)." IZA – Institute for the Study of Labor, Bonn, 03.12.2009 - 04.12.2009. http://conference.iza.org/conference_files/eddi09/2011_01_17_online_program.pdf.

Gregory, Arofan, Wendy Thomas, Mary Vardigan, and Joachim Wackerow. 2009. "The Data Documentation Initiative [DDI] XML Standard: Workshop on Implementation of DDI3 - Advanced Topics." Schloss Dagstuhl – Leibniz Center for Informatics, 01.11.2009 - 06.11.2009. http://www.dagstuhl.de/09452.

Gregory, Arofan, Wendy Thomas, Mary Vardigan, and Joachim Wackerow. 2008. "Workshop: The Data Documentation Initiative [DDI] XML Standard: Working Meeting on Advanced Topics in Usability and Interoperability." Schloss Dagstuhl – Leibniz Center for Informatics, 09.11.2008 - 14.11.2008. http://www.dagstuhl.de/08462.

Thomas, Wendy, and Joachim Wackerow. 2007. "Workshop: Further Development of the Data Documentation Initiative [DDI] XML Standard: Technical Implementation Committee Meeting." Schloss Dagstuhl – Leibniz Center for Informatics, 28.10.2007 - 01.11.2007. http://www.dagstuhl.de/07442.