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JUCS - Journal of Universal Computer Science 9(7): 719-728
doi:
10.3217/jucs-009-07-0719
Published:
28 Jul 2003
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Author
Josef Hofer-Alfeis 
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Siemens AG, Corporate Information and Operations, Enabling Processes and Knowledge Management, Germany
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Conflict of interest
The author has declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.