Max Völkel

• PhD
• Owner at IT Beratung Dr. Max Völkel

Knowledge domains and their formal representations via ontologies are typically subject to change in practical applications. Additionally, engineering of ontologies often takes place in distributed settings where multiple independent users interact. Therefore, change management for ontologies becomes a crucial aspect for any kind of ontology manage...

Conceptual Data Structures (CDS) is a unified meta-model for representing knowledge cues in varying degrees of granularity, structuredness, and formality. CDS consists of: (1) A simple, expressive data-model; (2) A relation ontology which unifies the relations found in cognitive models of personal knowledge management tools, e. g., documents, mind-...

Personal knowledge management (PKM) is a crucial element as well as complement of enterprise knowledge management (EKM) which has been largely neglected by Enterprise Information Systems, up to now. This paper collects requirements for a specific class of PKM software, which supports personal note taking and the idea of extending the human memory b...

This paper presents a new method for publishing and consuming RDF data using object-oriented programming. We improve Object Triple Mapping (OTM) by separating (1) the transformation process between object-oriented data and RDF data from (2) explaining the transformation results using established Semantic Web vocabulary. To achieve this separation,...

DeepaMehta is an open source semantic desktop application based on the topic maps standard. It's conceptualisation and especially the innovative graph-based user interface have been guided by findings in cognitive psychology in order to provide a cognitively adequate work- ing environment for knowledge workers of all kind. DeepaMehta aims to evolve...

See also http://ceur-ws.org/Vol-464/

Purpose The purpose of the paper is to design a model and tools that are capable of representing and handling personal knowledge in different degrees of structuredness and formalisation, and usable and extensible by end‐users. Design/methodology/approach This paper presents the results of analysing literature and various data models and formalisms...

In this paper we motivate how personal knowledge models can make knowledge workers more productive. The external representation can help him to tackle typical cognitive limits. They do so by allowing a knowledge worker to eficiently and efectively model her or his personal knowledge in a mix of informal and formal knowledge. As a result, more knowl...

Cool URIs for the Semantic Web W3C Interest Group Note 03 December 2008

Proceedings of the 3rd Semantic Wiki Workshop (SemWiki 2008) See also http://ceur-ws.org/Vol-360/

Knowledge Management (KM) tools have become an established part of Enterprise Information Systems in the recent years. While traditional KM initiatives typically address knowledge exchange within project teams, communities of practice, within a whole enterprise, or even within the extended enterprise (customer knowledge management, KM in the supply...

Managing and enabling knowledge is a key to success in our economy and society (Wenger, McDermott, & Snyder, 2002, p. 6). The problem of knowledge management can generally be tackled from two sides: top-down and bottom-up. Many approaches have been taken from the top down in which the organisation aimed to better manage their internal knowledge by...

Knowledge articulation costs are the bottleneck for efficient Personal Knowledge Management (PKM). Current tools either allow to few structures and hence have to rely only on keyword searches in plain text, allow no associative browsing, and cannot infer new knowledge. Semantic modelling tools on the other hands are too cumbersome to use and force...

Wikipedia is the world's largest collaboratively edited source of encyclopaedic knowledge. But in spite of its utility, its content is barely machine-interpretable and only weakly structured. With Semantic MediaWiki we provide an extension that enables wiki-users to semantically annotate wiki pages, based on which the wiki contents can be browsed,...

This paper reviews the document concept and compares analogue and digital documents. It introduces knowledge models as a superset of documents and explains the benefits of using knowledge models in Personal Knowledge Management (PKM).

Deliverable D2.3.8v1 (WP2.3) proposes the dynamic ontology lifecycle schema and discusses its implementation. It provides concrete solutions to ontology development and evolution issues in highly dynamic and data-intensive environments. Particularly, it deals with proper placement of ontology learning, evaluation and negotiation methods and with in...

Semantic MediaWiki is an extension of MediaWiki – a widely used wiki-engine that also powers Wikipedia. Its aim is to make semantic technologies available to a broad community by smoothly integrating them with the established usage of MediaWiki. The software is already used on a number of productive installations world-wide, but the main target rem...

Wikis are becoming popular knowledge management tools. Analysing knowledge management requirements, we observe that wikis do not fully support structured search and knowledge reuse. We show how Semantic wikis address the requirements and present a general archi- tecture. We introduce our SemperWiki prototype which oers advanced information access a...

Wikipedia is the world's largest collaboratively edited source of encyclopaedic knowledge. But its contents are barely machine-interpretable. Structural knowledge, e. g. about how concepts are interrelated, can neither be formally stated nor automatically processed. Also the wealth of numerical data is only available as plain text and thus can not...

RDF, a simple yet expressive data model, is widely recognised as the foundation for the Semantic Web. We revisit the RDF specifica-tion and analyse five problems: literals are not addressable, blank nodes are not addressable, reification is not semantically recognised, language tags are not addressable, and language tags can not be combined. We int...

iMapping is a visual technique for structuring information objects. It is based on research in the fields of visual mapping tech- niques, Information Visualisation and cognitive psychology. iMapping uses a Zooming User Interface to facilitate navigation and to help users maintain an overview in the knowledge space. An iMap is comparable to a large...

Semantic Wikis allow users to semantically annotate their Wiki content. The particular annotations can dier in expressive power, simplicity, and meaning. We present an elaborate conceptual model for semantic annotations, introduce a unique and rich Wiki syntax for these annotations, and discuss how to best formally represent the augmented Wiki cont...

Current Wiki engines are mostly monolithic applications which intermingle parser, user interface and data management backend. In this paper we show how these three components can be realised as lightweight, REST-style web services. We explain why this separation is useful and how the wiki community benefits from such an approach. Additionally, the...

Wikis are collaborative environments for authoring Web content. This workshop explores the role of semantic wikis in knowledge engineering. Semantic Wikis try to combine the strengths of semantic (machine processable, data integration, complex queries) and Wiki (easy to use and contribute, strongly interconnected, collaboration) technologies.

Developers used to object oriented programming have to make a paradigm shift in order to produce and manage Se-mantic Web data, e. g. RDF. In this paper we describe the tool RDFReactor which transforms a given ontology in RDF Schema into a famil-iar, dynamic, object-oriented Java API – at the push of a button. Developers then are able to interact w...

Knowledge domains and their semantic representations via ontologies are typically subject to change in practical applications. There-fore, especially in distributed environments, change management for on-tologies becomes a crucial aspect. In order to handle the these issues, we propose SemVersion, an RDF-centric versioning approach and its in-tegra...

http://www.fzi.de Abstract. In an attempt to create a lean vocabulary for incremental recording and step-wise formalisation of personal knowledge, we iden- tified a set of common knowledge structures. These Conceptual Data Structures (CDS) were found to be inherent to a variety of dierent knowledge artefacts ranging from vague paper notes to highly...

Knowledge domains and their semantic representations via ontologies are typically subject to change in practical applications. Additionally, engineering of ontologies often takes place in distributed settings where multiple independent users interact. Therefore, change management for ontologies becomes a crucial aspect for any kind of ontology mana...

Wikis are increasingly being used in world-wide, intranet and even in personal settings. Unfortunately, current wikis are data islands: people can read and edit them, but machines can only send around text strings without structure. Wiki migration, publishing from one wiki to another one and free choice of syntax hold back broader wiki usage. We de...

Managing knowledge is crucial in our economy. We derive re- quirements on personal knowledge management (finding, reminding, col- laboration, knowledge re-use and cognitively adequate interfaces) from cognitive psychological research and analyse the limitations of current solutions. We introduce a restful, wiki-based, open architecture for se- mant...

Wikipedia is the biggest collaboratively created source of en- cyclopaedic knowledge. Growing beyond the borders of any traditional encyclopaedia, it is facing new problems of knowledge management: The current excessive usage of article lists and categories witnesses the fact that 19th century content organization technologies like inter-article re...

EU-IST Network of Excellence (NoE) IST-2004-507482 KWEB Deliverable D2.3.3.v1 (WP2.3) This papers describes the requirements for a semantic versioning system. The design, implementation and usage of SemVersion are described.

Knowledge domains and their semantic representations via ontologies are typically subject to change in practical applications. Ad-ditionally, engineering of ontologies often takes place in distributed set-tings where multiple independent users interact. Therefore, change man-agement for ontologies becomes a crucial aspect for any kind of ontology m...

Today's web sites closely intertwine services with visual mark- up. Web page operators are unlikely to change this, as they depend on advertising revenues. wal enables average users to build web service wrappers for existing pages. By spawning many basic web services, this prepares the ground for the next wave of compound web services.

There is currently no model that is capable of representing the content of web resources together with their semantic web meta-data. This paper presents re-quirements for semantic content management, a unified human-browsable and human-editable semantic web content model (SWCM), and its implementation swecr. 1 Unifying Web and Semantic Web This pap...

To build semantic web applications, developers must master three things at the same time: Their programming language, the semantic web languages (RDF, RDFS and OWL), and the web protocols (HTTP). This paper presents a frame-work, semweb4j that turns Java developers into semantic web developers without requiring them to learn RDF, RDFS, HTTP or Serv...

Today, most computer users work with traditional hierarchical flle systems for organizing large amounts of personal flles. Recently, tagging has grown popular as an alternative means of organizing information resources. We argue that tagging is a powerful paradigm for e-cient information access which overcomes many deflciencies of hierarchical flle...

In Model driven architecture (MDA) domain experts model their knowledge in a modeling language at a higher abstraction level than source code. The mapping from domain models to source code is often performed automatically, but programmers still have to implement many details manually. MDA brings domain experts and programmers closer together and ma...

Current Wiki engines are mostly monolithic applications which in- termingle parser, user interface and data management backend. In this paper we show how these three components can be realised as lightweight, REST-style web services. We explain why this sepa- ration is useful and how the wiki community benefits from such an approach. Additionally,...

Interoperability of applications is an important goal for data integration and collaboration. The Semantic Web recommend the use of ontologies to describe the semantics of the data. Unfortunately de-velopers familiar with object oriented programming languages have to make a paradigm shift in order to produce data (e. g. RDF) usable on the Semantic...