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- Language type:
Created as an attempt to combine visual, logic,
and set-based programming disciplines, SPARCL
is an academic programming system developed
to aid exploratory programming.
As a logic programming language, SPARCL supports
definition of facts and relationships between
them. The system has three kinds of
clauses: facts, rules, and questions, although
any rule can be queried as a question if the
user wishes. Data types supported by the
language seem to be numbers and atoms.
Execution in SPARCL, as in Prolog,
occurs in response to a question. The
language system performs a unification of
the facts and rules presented by the
visual diagrams. Backtracking is the
unification strategy employed by the current
There is only one implementation of
SPARCL, for the Mac, available free
from the language's web site.
L. Spratt, U. of Kansas, 1993.
- See Also:
SPARCL runs in the highly visual
environment provided by MacOS on
Macintosh hardware. It can also
generate 3-D models of its 'programs'
for rendering with the POV-Ray raytracer.
However, it is not clear from the documentation
whether the 3-D aspects of some SPARCL
programs are algorithmically necessary,
or merely cosmetic. Use of the 3-D
rendering as a tool for improving view
comprehension of diagrams of algorithms
was examined in a 1994 paper about SPARCL.
- Sample code:
Here is a SPARCL program that computes the sum of
the values of a term.
Descriptions in this dictionary are ©1997-99 Neal Ziring. Some
examples copyright of their respective authors. Some
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Dictionary and script maintained by Neal Ziring, last major modifications 3/18/98. Most recent
additions to dictionary and master list, 1/00.