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Alexander Sigel

Telephone: +49 174 3006426
Email: sigel@asigel.de

Siebengebirgsallee 2, 50939 Cologne, Germany

Author of several papers and tutorials on Knowledge Organization with Topic Maps, and of papers on an open-source semantic blogging system based on Topic Maps. Former researcher and teacher of semantic technologies at University of Cologne, with supervision of several diploma theses related to Topic Maps. Former co-chair of the TMRA conferences and co-editor of a TMRA proceedings volume. Former entrepreneur in semantic knowledge services. Guest researcher at the Topic Maps Lab in August 2009.

For publications, see the Zotero group TopicMaps

I am enthused by Topic Maps since my first encounter back in 1999. That’s no surprise for an information scientist interested in augmenting human knowledge processes by information systems in computers. The paradigm of subject-centricity helps collocating all facts about a subject in one logical place, bridging all kinds of media, syntactic and semantic gaps – ideal for knowledge integration! Knowledge organization systems such as lightweight ontologies, thesauri or faceted classification systems can be easily modelled by and for humans, and also processed by computers. Semantic retrieval comes true with TMQL. Because no particular world view is imposed, semantic heterogeneity can be flexibly dealt with. This opens up fascinating prospects for knowledge federation and knowledge gardening, and new products and services based on the exchange of semantic network fragments via semantic knowledge services in the socio-semantic web.

Author of

Towards Knowledge Organization with Topic ...

by Alexander Sigel 


The exciting Topic Maps (TMs) are an ideal catalyst for mutual learning experiences for proponents from the partially overlapping communities of …

Knowledge Federation from a Knowledge ...

by Alexander Sigel 


The new field of knowledge federation and the existing field of knowledge organization share quite a number of objects of experience and …

Topic Maps in Knowledge Organization

by Alexander Sigel 


There is a natural overlap and complement between Knowledge Organization (KO) and Topic Maps. I am convinced that KO, with its relevant knowledge of …

Knowledge Organization with Topic Maps - ...

by Alexander Sigel 


This introductory tutorial will review approaches on how Knowledge Organization (KO) with Topic Maps (TMs) can aid organizing information resources …

Was presented at TMRA 2006.

XML Topic Maps (XTM) in Knowledge ...

by Alexander Sigel 


This presentation is about the potential of ISO/IEC 13250 XML Topic Maps (XTM) as an instrument for Knowledge Organization (KO) and Knowledge …

Topic-Oriented Portals

by Alexander Sigel and Kal Ahmed 


For the complete article see the printed version in Encyclopaedia of Portal Technology and Applications In general, portals are regarded as …

Report on the Open Space Sessions (TMRA ...

by Alexander Sigel 


This report summarizes the eleven contributions by eight presenters from the two open space sessions that took place during the TMRA’05 workshop …

Was presented at TMRA 2005.

Content Intelligence durch Verknüpfung ...

by Alexander Sigel 


This presentation shows how to combine Context Intelligence and Knowledge Management with Topic Maps. THIS PRESENTATION IS IN GERMAN! Der …

Informationsintegration mit semantischen ...

by Alexander Sigel 


This tutorial gives theoretical foundations of semantic integration. THIS TUTORIAL IS IN GERMAN! Das Tutorium vermittelt theoretische …

From traditional Knowledge Organization ...

by Alexander Sigel 


Within the three-part workshop “Introducing Terminology-based Ontologies” by Schmitz- Esser, Poli and Sigel, this paper accompanies the first …

kPeer (Knowledge Peers): Informationssuche ...

by Alexander Sigel 


This presentation introduces kPeer, a project that develops a P2P-technology with Topic Maps.


kPeer as a Context-Aware Topic Map P2P ...

by Alexander Sigel 


First ideas on how context may be employed within the kPeer (Knowledge Peers) project are discussed. kPeer aims at the virtual and distributed (P2P) …

Kundenorientierte ...

by Alexander Sigel 


This presentation is partly about Topic Maps as a possible solution for information services.

Organisation verteilten Wissens mit ...

by Alexander Sigel 


Der Beitrag berichtet über Grundideen in der Explorationsphase des Projektes kPeer (Knowledge Peers). Gegenstand ist die dezentrale Organisation, …

Topic Maps: Ein Weg zur Organisation von ...

by Alexander Sigel 


This report gives an insight in practical experiences with Topic Maps. Some ideas on Topic Maps and Knowledge Management are given as well.

Knowledge organization and management of ...

by Alexander Sigel 


There is a rising interest in classical knowledge organization issues within knowledge management for knowledge-intensive industries (e.g. …

Topic Maps-based Semblogging with semblog-tm

by Alexander Sigel, Lars Bünten, and Marcus Frank 


Semantic blogging combines blogs with the Semantic Web for improved metadata. Our analysis of six semblogging approaches and systems reveals that …

Was presented at TMRA 2006.

Topic Maps-based semblogging with ...

by Alexander Sigel and Lars Bünten 


This video shows a demonstration of the semblog-tm software. (Filesize 32 MB, approximately runningtime 17 minutes, an edited transcript is zipped …

Was presented at TMRA 2006.

Was leisten Topic Maps?

by Alexander Sigel 


Dieser Kurzbeitrag skizziert das Potential der Topic Map-Technologie (ISO/IEC 13250 und XTM 1.0) für die Wissensorganisation und veranschaulicht …

Wissensnetze, Topic Maps & Co.: Praktischer ...

by Alexander Sigel 


This presentation is about Topic Maps and its uses for content interlinking.

Wissensorganisation mit Topic Maps

by Alexander Sigel 


This presentation is mainly about knowledge organization with Topic Maps. IN GERMAN! Spezieller Gegenstand des Vortrags ist die …

Wissensorganisation, Topic Maps und ...

by Alexander Sigel 


How can concept structures be combined with Topic Maps? More generally: How can the field of Knowledge Organization contribute to the goal of …


by Alexander Sigel 


This two-day tutorial from 2001 was concernd with knowledge organization and Topic Maps.

Again: How might we tie more formal ...

by Alexander Sigel 


This is an Email to the XTM Working Group Mailing list. Given that most semantic web effort and research is now (or still?) in rdf and …

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Alexander Sigel is visiting the Topic Maps ...

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Alexander Sigel, former researcher and entrepreneur in Topic Maps-based semantic knowledge services, is visiting the Topic Maps Lab in Leipzig as a …


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As a former information scientist, I am fascinated since 1999 by the capabilities for building Topic Maps-based knowledge systems having the potential to augment human mind. One can model arbitrary knowledge organization systems, deal with semantic heterogeneity, collocate all facts about one subject in one logical place, and with TMQL have semantic retrieval on federated semantic networks. Therefore I expect bright prospects for business concepts building on the exchange of such knowledge snippets via semantic knowledge services.

Alexander Sigel
Topic Maps Lab auf der Cebit 2011

Graduate from the Topic Maps Lab