gida drawings analysis collage network 
coding scheme 
related work design studies classifications graphic systems current stage discussion acknowledgment thanks
Related Work - Classifications.
Ways of Arrangement
(Wang 1987)
Generic Representations
(Achten 1997)
Cognitive Transformation
(Goel 1999)
Qualitative Representation
(Gero & Park 1997)
(Gero & Damski 1999)
