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Emerging Web applications such as context-adaptive Web systems and Semantic Web applications raise the need for combining automated reasoning methods with Web languages, especially with Web query, schema, and update languages. In order to develop an integrated approach, this working group investigates powerful mechanisms for handling geotemporal, geospatial and topical data in different application scenarios.
The group A1 develops a general software architecture for both, geotemporal and geospatial information processing. There are two systems which are being constructed in this way. The CTTN and the CTSN system.
The CTTN-system is a computer program which provides advanced processing of temporal notions. The specification language is the GeTS language (GeoTemporal Specifcations). The support systems consist at the moment of the FuTI library for fuzzy temporal intervals and the PartLib library for modelling periodic temporal notions, calendar systems. The latest progress in this field includes a major revision of the PartLib library and a new parser for XML-specifications of periodic temporal notions.
More information: http://ww.pms.ifi.lmu.de/CTTN
Contact: Hans Jürgen Ohlbach (Munich)
The group A1 develops a general software architecture for both, geotemporal and geospatial information processing. There are two systems which are being constructed in this way. The CTTN and the CTSN system. For geospatial information processing the group A1 designed and partially realised the CTSN system (Computational Treatment of Spatial Notions).
The specification language of the CTSN system is the MPLL language (Multi Paradigm Location Language). The application independent features of GeTS and MPLL are the same, but MPLL contains contain many built-in data structures and functions for spatial notions. The first version of the specification of MPLL has been finalised at the end of 2006, currently, the implementation is underway.
This webcast illustrates the use and features of an early
stage prototype
of MPLL:
http://rewerse.net/demos/screencasts/a1/a1wc-MPLL.mov
More information: http://rewerse.net/publications/index.html#REWERSE-RP-2006-179
Contact: Bernhard Lorenz (Munich)
A further major component of CTSN is the TransRoute framework. The focus of TransRoute is on the representation of various network structures like roads or railways. Different spatial queries (e.g. shortest path or nearest neighbour queries) can be answered and also displayed in TransRoute. A demo is available that shows the basic features of TransRoute, a framework for representing, processing and querying graphs. The street network of Munich serves as a testbed, consisting of around 10000 vertices and 15000 edges.
More information:
Contact: Edgar-Philipp Stoffel and Bernhard Lorenz (Munich)
CTSN contains two different graphical interfaces. One is the Google Earth client, and another is our own development of the OTN2SVG prototype, an SVG (Scalable Vector Graphic) client.
L-DSMS facilitates filtering and transformation of XML data streams. Several applications are available.
More: http://rewerse.net/A1/ldsms
This webcast illustrates how traffic information provided using L-DSMS can be integrated into Google Earth.
Screencast: a1wc-GeoDataServer.mov
(Note: requires Apple Quicktime)Contact: Bernhard Lorenz (Munich)
A demo is available that shows how the system processes an XML
stream of RDS/TMC data (Traffic Information broadcast via radio
signals).
Contact: Bernhard Lorenz (Munich)
This screencast shows how the output of streamed traffic and travel information produced by the L-DSMS Prototype can be displayed using the Google Earth Client.
Screencast: A1-SC-LDSMS-Google-Earth.avi
(Note: requires FFMpeg FMP4 Codec or the open source player VideoLAN)Contact: Bernhard Lorenz (Munich)
As an application which consumes streamed XML data, we show how the TMC data provided by the L-DSMS are cached, transformed to the Keyhole Markup Language (KML), and made available on a web server for display in the Google Earth client.
Contact: Bernhard Lorenz (Munich)
This webcast shows the monitoring features of the first version of a GUI for L-DSMS.
Screencast: a1wc-Visu-L-DSMS.mov
(Note: requires Apple Quicktime)Contact: Bernhard Lorenz (Munich)
The access to the EFGT net (Events, thematic Fields, Geographical and Temporal notions) as a further support module is partially realised. The EFGT network contains in the meantime several thousand entries about events, together with their geographic, temporal and thematic classification.
Named entities (e.g., "Kofi Annan", "Coca-Cola", "Second World War") are ubiquitous in web pages and other types of document and often provide a simplified picture of the document's content. We present an ontology currently containing 31,000 named entities in different languages from various domains such as history, geography, politics, sports, arts, etc., which is being developed at the University of Munich (LMU). The underlying graph data model is simple and yet extremely versatile in different application scenarios. We demonstrate a prototype of a graphical interface to both the ontology and to documents on the web or in a local document repository, with a tight interaction in both directions. Occurrences of concepts from the ontology are highlighted and hyperlinked in the documents. Unrecognized entities could be added to the database and related to other concepts in a semiautomatic process. The entity database can also be used for extending full-text queries on the web or the repository to semantically close documents, and for indexing different kinds of named entities in the document repository. Similar to a programming IDE, the system illustrates how integrated browsing, search and update functionality contributes to the construction of high-quality ontologies, fundamental to the vision of a truly "semantic" web.
More information: Extended Abstract
Contact: Felix Weigel, Klaus U. Schulz, Levin Brunner, Eduardo Torres-Schumann, Centre for Information and Language Processing (CIS, Munich)
Further Information on A1 website
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