Constraint SVG

ABSTRACT

We believe it is important for web graphic standards such as SVG to support user interaction and diagrams that can adapt their layout and appearance to their viewing context so as to take into account viewing device charateristics and the viewer's requirements. Previously we suggested that adding expression-based attributes to SVG and using one-way constraints to evaluate these dynamically would considerably improve SVG's support for adaptive layout and user interaction. We describe a minimal backward compatible extension to SVG 1.1, called Constraint SVG (CSVG), that provides such expression-based attributes and its implementation on top of Batik. CSVG also provides another significant extension to SVG 1.1: it allows the author to define new custom elements using XSLT.

REFERENCES

• 1: Kim Marriott , Bernd Meyer , Laurent Tardif, Fast and efficient client-side adaptivity for SVG, Proceedings of the 11th international conference on World Wide Web, May 07-11, 2002, Honolulu, Hawaii, USA [doi>10.1145/511446.511510]
• 2: Bradley T. Vander Zanden , Richard Halterman , Brad A. Myers , Rich McDaniel , Rob Miller , Pedro Szekely , Dario A. Giuse , David Kosbie, Lessons learned about one-way, dataflow constraints in the Garnet and Amulet graphical toolkits, ACM Transactions on Programming Languages and Systems (TOPLAS), v.23 n.6, p.776-796, November 2001 [doi>10.1145/506315.506318]

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.4 INFORMATION SYSTEMS APPLICATIONS
      H.4.m Miscellaneous

Additional Classification:
  D. Software
  D.2 SOFTWARE ENGINEERING

  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)

General Terms:
Human Factors

Keywords:
CSVG, SVG, adaptivity, constraint-based graphics, constraints, differential scaling, document formats, interaction, scalable vector graphics, semantic zooming