# Olaf Hartig

> Semantic Web researcher

**Wikidata**: [Q30103409](https://www.wikidata.org/wiki/Q30103409)  
**Source**: https://4ort.xyz/entity/olaf-hartig

## Summary
Olaf Hartig is a computer scientist and researcher specializing in the Semantic Web. He is currently affiliated with Linköping University in Sweden. Hartig has held various research and academic positions, including postdoctoral roles at the University of Waterloo and the University of Potsdam, and he earned his Doctor of Philosophy from Humboldt-Universität zu Berlin.

## Biography
*   **Education:**
    *   Doctor of Philosophy (Ph.D.), Humboldt-Universität zu Berlin (2007–2014)
    *   Diplom, Humboldt-Universität zu Berlin (2000–2006)
*   **Known for:** Semantic Web research
*   **Employer(s):**
    *   Linköping University (2016–Present; roles include periods starting 2016-08, 2018-10, and 2022-06)
    *   University of Potsdam (2015–2016; Postdoctoral Researcher)
    *   University of Waterloo (2012–2014; Postdoctoral Researcher)
    *   Humboldt-Universität zu Berlin (2006–2012; Research Assistant and Doctoral Student)
*   **Field(s):** Computer Science

## Contributions
Based on the provided structured data, Olaf Hartig's contributions are documented through his extensive career trajectory and digital identifiers within the academic community. His primary contribution is his research in the field of the Semantic Web.

Throughout his career, Hartig has held sequential research positions at prominent institutions. He served as a postdoctoral researcher at the University of Waterloo starting in December 2012 and later at the University of Potsdam starting in October 2015. Since August 2016, he has been affiliated with Linköping University in Sweden, continuing his research tenure.

His academic output is tracked by numerous bibliographic databases, reflecting his active participation in computer science literature. He holds identifiers in major academic databases such as DBLP, Scopus, Google Scholar, and the ACM Digital Library. Additionally, he maintains a personal academic website (olafhartig.de) and has a presence on social media platforms like Twitter (@olafhartig) and GitHub (hartig), where he engages with the wider tech and research communities.

## FAQs

### Q: What is Olaf Hartig's primary research focus?
A: Olaf Hartig is described as a Semantic Web researcher. He operates within the field of computer science.

### Q: Where did Olaf Hartig receive his education?
A: He received both his Doctor of Philosophy (Ph.D.) and his Diplom degree from Humboldt-Universität zu Berlin. His doctoral studies occurred between October 2007 and June 2014.

### Q: What is Olaf Hartig's current academic affiliation?
A: According to employment records, he is affiliated with Linköping University in Sweden, with recorded employment periods starting in August 2016, October 2018, and June 2022.

## Why They Matter
Olaf Hartig represents the active body of researchers advancing the capabilities and understanding of the Semantic Web. His career path—spanning major research institutions in Germany, Canada, and Sweden—highlights the international collaborative nature of computer science research. By transitioning from a doctoral student at Humboldt-Universität zu Berlin to postdoctoral roles at institutions like the University of Waterloo and eventually to a sustained position at Linköping University, Hartig contributes to the continuity and evolution of academic inquiry in data structuring and web technologies. His verified presence across a multitude of academic identifier systems (ORCID, GND, VIAF, Scopus, etc.) further underscores his established integration into the global scientific infrastructure.

## Notable For
*   **Semantic Web Research:** Identified specifically as a researcher in this domain.
*   **International Academic Career:** Has held research positions in Germany (Humboldt-Universität zu Berlin, University of Potsdam), Canada (University of Waterloo), and Sweden (Linköping University).
*   **Extensive Academic Identifiers:** Holds verified IDs in over a dozen databases, including Scopus, DBLP, ACM, and VIAF, indicating a robust publication and citation history.
*   **Long-term Affiliation:** Has been associated with Linköping University continuously since 2016.

## Body

### Education and Early Career
Olaf Hartig completed his Diplom at Humboldt-Universität zu Berlin between August 2000 and June 2006. Immediately following this, he began working as a research assistant at the same institution in October 2006. He subsequently enrolled as a doctoral student at Humboldt-Universität zu Berlin in October 2007, completing his Doctor of Philosophy (Ph.D.) in June 2014.

### Postdoctoral Appointments
Following the completion of his doctorate, Hartig moved to the University of Waterloo in Canada. He served as a postdoctoral researcher there from December 2012 to November 2014. In October 2015, he began a postdoctoral researcher position at the University of Potsdam in Germany, which concluded in June 2016.

### Tenure at Linköping University
Hartig's affiliation with Linköping University in Sweden began in August 2016. His employment history indicates multiple contracts or role changes at the university:
*   **August 2016 – September 2018:** Initial tenure.
*   **October 2018 – May 2022:** Subsequent tenure.
*   **June 2022 – Present:** Current ongoing affiliation (as of the latest record dated November 2023).

### Online Presence and Identifiers
Hartig maintains a professional website in English at `http://olafhartig.de/`. He is active on social media and developer platforms, with a Twitter handle `@olafhartig` (User ID: 18238000) and a GitHub username `hartig`. His academic identity is cataloged under several authority control systems, including:
*   **GND ID:** 1057882933
*   **ORCID:** 0000-0002-1741-2090
*   **DBLP Author ID:** 29/3132
*   **Google Scholar ID:** agnCxtUAAAAJ
*   **ACM Digital Library ID:** 81384618989

## References

1. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/education/3243347)
2. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/education/3243382)
3. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/employment/18808757)
4. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/employment/18808743)
5. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/employment/3243344)
6. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/employment/3243337)
7. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/employment/3243323)
8. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/employment/3243309)
9. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-1741-2090/employment/3243317)
10. [Source](https://data.dnb.de/opendata/authorities-gnd-person_lds.rdf.gz)
11. [SciGraph](https://scigraph.springernature.com/person.011044527737.89)
12. National Library of Israel Names and Subjects Authority File