---
_id: '39510'
abstract:
- lang: eng
  text: Modeling of human knowledge and reasoning requires the formulation of uncertainty
    in its various forms. Fuzzy logic was introduced to directly support these applications
    (H. Zimmermann, 1991). Fuzzy control (FC) which is based on fuzzy logic allows
    one to control complex systems based on qualitative information like human knowledge
    (C. Geiger and G. Lehrenfeld, 1994). In fuzzy logic, fuzzy sets are usually defined
    and manipulated by means of complex mathematics, whereas the fuzzy control process
    is frequently outlined by visual sketches based on set diagrams in order to enhance
    the comprehension of the inference process. The rule based execution of this process
    usually follows the lines of rule based visual programming languages (VPLs), i.e.,
    languages comparable to Agentsheets and ChemTrains. This strongly indicates that
    VPLs are thus well applicable for this use. We first outline the basic concepts
    of fuzzy logic and fuzzy control. Thereafter, we sketch a visual language which
    integrates fuzzy set diagrams in the visual representation of rules. The basic
    concepts are inherited from the complete visual programming language, Pictorial
    Janus (PJ). However, we significantly simplify PJ's visual concepts in order to
    adapt it for our purpose.
author:
- first_name: M.
  full_name: Dücker, M.
  last_name: Dücker
- first_name: Christian
  full_name: Geiger, Christian
  last_name: Geiger
- first_name: Georg
  full_name: Lehrenfeld, Georg
  last_name: Lehrenfeld
- first_name: Wolfgang
  full_name: Müller, Wolfgang
  id: '16243'
  last_name: Müller
- first_name: C.
  full_name: Tahedl, C.
  last_name: Tahedl
citation:
  ama: 'Dücker M, Geiger C, Lehrenfeld G, Müller W, Tahedl C. A Visual Programming
    Language for Qualitative Data. In: <i>Proceedings of the 1997 IEEE Symposium on
    Visual Languages</i>. ; 1997. doi:<a href="https://doi.org/10.1109/VL.1997.626593">10.1109/VL.1997.626593</a>'
  apa: Dücker, M., Geiger, C., Lehrenfeld, G., Müller, W., &#38; Tahedl, C. (1997).
    A Visual Programming Language for Qualitative Data. <i>Proceedings of the 1997
    IEEE Symposium on Visual Languages</i>. <a href="https://doi.org/10.1109/VL.1997.626593">https://doi.org/10.1109/VL.1997.626593</a>
  bibtex: '@inproceedings{Dücker_Geiger_Lehrenfeld_Müller_Tahedl_1997, place={Capri,
    Italy}, title={A Visual Programming Language for Qualitative Data}, DOI={<a href="https://doi.org/10.1109/VL.1997.626593">10.1109/VL.1997.626593</a>},
    booktitle={Proceedings of the 1997 IEEE Symposium on Visual Languages}, author={Dücker,
    M. and Geiger, Christian and Lehrenfeld, Georg and Müller, Wolfgang and Tahedl,
    C.}, year={1997} }'
  chicago: Dücker, M., Christian Geiger, Georg Lehrenfeld, Wolfgang Müller, and C.
    Tahedl. “A Visual Programming Language for Qualitative Data.” In <i>Proceedings
    of the 1997 IEEE Symposium on Visual Languages</i>. Capri, Italy, 1997. <a href="https://doi.org/10.1109/VL.1997.626593">https://doi.org/10.1109/VL.1997.626593</a>.
  ieee: 'M. Dücker, C. Geiger, G. Lehrenfeld, W. Müller, and C. Tahedl, “A Visual
    Programming Language for Qualitative Data,” 1997, doi: <a href="https://doi.org/10.1109/VL.1997.626593">10.1109/VL.1997.626593</a>.'
  mla: Dücker, M., et al. “A Visual Programming Language for Qualitative Data.” <i>Proceedings
    of the 1997 IEEE Symposium on Visual Languages</i>, 1997, doi:<a href="https://doi.org/10.1109/VL.1997.626593">10.1109/VL.1997.626593</a>.
  short: 'M. Dücker, C. Geiger, G. Lehrenfeld, W. Müller, C. Tahedl, in: Proceedings
    of the 1997 IEEE Symposium on Visual Languages, Capri, Italy, 1997.'
date_created: 2023-01-24T11:51:04Z
date_updated: 2023-01-24T11:51:08Z
department:
- _id: '672'
doi: 10.1109/VL.1997.626593
keyword:
- Computer languages
- Fuzzy control
- Fuzzy sets
- Animation
- Visualization
- Fires
- Application software
- Pattern matching
- Impedance matching
- Domain specific languages
language:
- iso: eng
place: Capri, Italy
publication: Proceedings of the 1997 IEEE Symposium on Visual Languages
publication_identifier:
  isbn:
  - 0-8186-8144-6
status: public
title: A Visual Programming Language for Qualitative Data
type: conference
user_id: '5786'
year: '1997'
...