KnowWE

From semanticweb.org

KnowWE
www.is.informatik.uni-wuerzburg.de/en/research/applications/knowwe/
Status:	beta
Last release:	2.0 (Oct 2008)
License:	LGPL
Affiliation:	University of Würzburg

KnowWE is a Java-based semantic knowledge wiki based on the implementation of JSPWiki. It's parsing engines and problem-solvers also build on the d3web project. KnowWE stands for Knowledge Wiki Environment and emphasizes the distributed development of problem-solving knowledge within a semantic wiki.

• Homepage: www.is.informatik.uni-wuerzburg.de/en/research/applications/knowwe/
• programmed in Java
• maintained by Joachim Baumeister, Jochen Reutelshoefer

Contents 1 Evaluation 1.1 Main wiki characteristics 1.2 Standard project info (align with sourceforge attributes) 1.3 Standard wiki features 1.3.1 User Features 1.3.2 Developer Features 1.4 Formalization 2 Publications

[edit] Evaluation

[edit] Main wiki characteristics

Is the wiki web-based or a (standalone) desktop application?

• Web-based

What communities (type/size) is the wiki intended for?

• closed communities, i.e., small group of practiced knowledge engineers
• support for semi-open medium-sized communities is focus of current work

[edit] Standard project info (align with sourceforge attributes)

What is the wiki engine's software license?

• GNU Lesser General Public License

What programming language is it written in?

• Java (JSPWiki Plugin)

What status is the project in? (project maturity)

• Beta

What is the estimated size of the developer community?

• currently 3-5 developers

What is the estimated size of the installation base?

• currently around 10 installations (mainly developers, 2 running projects)

[edit] Standard wiki features

[edit] User Features

• Editing: Currently mainly based on textual markup in the edit pane (supported by code-completion and code-templates). Interactive editing (supported by AJAX) in the view is planned. wiki-syntax
• Markup Syntax: Extended JSPWiki style
• Access Rights: based on the extensive JSPWiki ACL management
• Attachments: as separate resources
• Versioning: Standard Wiki features like diff and rollback
• Navigation Support: Wiki links, semantic links on derived facts, navigable hierarchy of ontological concepts
• Plugins: KnowWE is a JSPWiki plugin, but is itself extensible by providing a plugin interface
• Further Features: Improved semantic navigation and SPARQL endpoint (prototype), interactive visual edits (planned)

[edit] Developer Features

• Backend: JSPWiki, Tomcat, Sesame
• Versioning 4 Devs: CVS
• XML-RPC Ready: no
• Extensions Mechanism: Plugin

[edit] Formalization

• Semantics are included in the wiki markup. Currently, we provide three alternatives: explicit knowledge markup, semantic annotation, segmented text

• Support of end user: Autocompletion is provided during edit of a wiki page (already existing ontological concepts are proposed). Furthermore, the user can select from templates when editing explicit problem-solving knowledge.

• What representation language is used? (RDF/OWL/...): OWL is used for concepts and defined relations, proprietary d3web XML representation used for problem-solving knowledge.

• Versioning support: Since all knowledge is represented within the wiki text, the standard versioning of JSPWiki is re-used. Planned: Specialized editor for knowledge diff and merge.

• Things to be formalized: Text is annotated by ontological content. Additionally, problem-solving knowledge within the text can be made explicit using, for example, rules or set-covering models.

• Is there support for typing pages/category system/page tagging? No, currently not in focus.

• Is there support for typing links? Yes, links can be typed by ontological properties.

• Ontology support: In principle OWL-DL but not yet fully evaluated in practice.

• Loading/saving ontologies
  • Export: compiled knowledge bases for d3web engine (running), OWL file of entire ontology (prototype status)
  • Import: d3web text formats for basic ontology definitions and problem-solving knowledge

• Can ontologies be created/changed from within the wiki? Yes, simply use the provided wiki markup... :-)

• Reasoning support: OWL-RDFS (see above); additionally: derivation of new facts by rules/models using the reasoning engine d3web.

• Is the instance data required to comply with the ontologies? No

• How can semantic information be exploited: Solving classification problems, navigation, SPARQL queries (prototype)

• Querying support: SPARQL queries are embedded within the wiki text (prototype)

• Visualization: No, currently not in focus.

[edit] Publications

• Baumeister, J.; Puppe, F.: Web-based Knowledge Engineering using Knowledge Wikis, Proc. of the AAAI 2008 Spring Symposium on "Symbiotic Relationships between Semantic Web and Knowledge Engineering", pp. 1-13, Stanford University, USA, 2008

• Reutelshoefer, J.; Baumeister, J.; Puppe, F.: Ad-Hoc Knowledge Engineering with Semantic Knowledge Wikis, Proc. of SemWiki 2008 - The Wiki Way of Semantics, Workshop co-located with the 5th European Semantic Web Conference (ESWC), Tenerife, Spain, June 02, 2008

• Baumeister, J.; Reutelshoefer, J.; Puppe, F.: KnowWE - Community-based Knowledge Capture with Knowledge Wikis, Proc. of the 4th International Conference on Knowledge Capture (KCAP), 189-190, ACM Press, 2007

• Baumeister, J.; Reutelshoefer, J.; Puppe, F.: Markups for Knowledge Wikis, Proc. of Semantic Authoring, Annotation and Knowledge Markup Workshop (SAAKM), 7-14, Whistler, Canada, 2007