Note
that the definitions of symbols as abstract (indexical or symbolic) or
replicative (iconic) may be better
classified in semiotic theory from Peirce. See
http://www.jfsowa.com/pubs/signproc.htm
"In classifying signs, Peirce used
his trichotomy to subdivide the sign relation into the triad of icon,
index and symbol: an icon represents an object by its inherent form,
which resembles the intended object; an index represents its object by some
causal relationship, such as a pointing finger, a weather vane, or a dial on a
meter; and a symbol represents its object by a convention established by some
community."
len
From: David Hall
[mailto:]
The following is a
link to the Emergency symbology study performed by Kent State for FEMA that
was mentioned in today's XML committee call.
http://dept.kent.edu/geography/Dymon/symbology.htm