partial conclusions about design patterns
lourenci at lsi.usp.br
Fri Dec 1 17:31:55 UTC 2000
I found a very interesting paper about design patterns
entitled Giving the Quality a Name JOOP june 1998 from Amnon H.Eden.
The following quoted passage tunes with my general
about the subject.
A "quality without a name"?
"In contrast to the search for a precise specification language,
trends within the patterns community do not see favorably the
attempts to subject design patterns to scientific analysis.
This school of thought holds a reactionary view of patterns
that adheres to the pattern concept as originally conceived
by Alexander. According to this view, a pattern is an idea, an
element of a language, and a quasi-corporeal concept whose
essence is intangible, elusive, and hence beyond the scope of
a literal expression. A "good" pattern departs from mere
microarchitectural prescription by some immaterial quality
that cannot be explicitly expresse, a "quality without a name"
and therefore cannot be interpreted outside its context or
taken apart. Therefore, going meta, as the reflexive treatmeent
of design patterns that follow the analytic traditions's
course of action is connoted, is meaningless.
Others do not treat patterns as sacred cows (like me). The
rational school considers the actual and potential contribution
of design patterns too valuable for them to be referred to
as heavenly bodies. Much benefit can be gained from an analytic
approach, namely, by "dissecting" the proposed solutions and
reducing them to building blocks of higher resolution. thereby
allowing systematic reconstruction of new design patterns,
formal treatment of their relationships, and tools that support
. He sees an interesting
paper like the one by Bosch that attempted a more precise means
of design pattern specification, such as dedicated programming
languages or extensions to existing OOP languages or by mandating
constrainsts on their implementation as an attempt
to capture the abstractions behind
all possible conforming implementations.
Amnon distinguishes these underlying abstractions of the
solutions from the remaining designations of the term
design patterns and call them lattices.
He creates a language called LePUS which is a small subset
of higher order monadic logic with natural graphic representation,
which abstracts singular specifications as atomic relations
and entities in a logic model ...and so on (page 11)
Günther Kniesel tries to identify meta patterns and identifies
delegation as the best generic mechanism to implement some
of the patterns.
Jecel and Dave seems to state that all the abstractions
captured by the design patterns can be implemented perfectly
well in Self.
As a model designer, no expert will deny that my ecodesign
models all aspects in the act of designing architectural
objects and the relationship with the environment hence
implying in urban design and further urban and regional
Moreover I had to translate this into a geometric modeling.
I did this through the symmetry groups of the plane and
the dotless planes + tilings + the subgroup relationships
among crystallographic groups and so on.The variant of
the tiling is due to the contribution of the graphic artist
Maurits C.Escher. Indeed to deal with the symmetry groups
the way I did is all based on Escher's imagery.
Earlier PhD in mathematics stated they were pure phantasies.
Now thanks to the yugoslavian mathematician Jablan not
only can I classify all Escher's "phanatasies" but also
Jablan made me aware primitive people ten thousand years
before Christ knew all these symmetry groups!!!!!!!!
I am an artist and I follow a scientific approach to my
Computer scientists say they are scientists and are
obviously behaving as if they were artists of a certain
trend...I mean, abstract art gave origin to several
paintings belonging to different artists.
We find in the literature many methods, many abstraction
mechanisms, too many things and the poor person from
the applied areas, interested like me to save Mother
Earth from collapse finds huge hurdles to implement
a serious research that will increase dramatically
the quality of life on earth.
Indeed I think Self is the language that tunes with
the hermeneutic nature of my ecodesign model. It has
an advanced user interface. An architect does nothing
with words, only with forms!!!!!It has Kansas, It is
becoming portable to many platforms even PC!
And I cannot implement my ecodesign model if an
expressive language like Self is not available.
I am awaiting this porting to PC!!
Since the most powerful related work to my ecodesign
model is Alexander's A pattern language, and I was
going to work under his advising to exchange ideas
(1990-1992) it is quite natural I feel inclined
to scientifically examine his proposals and
the GOF patterns. When I ask for help, it is because
I have to persuade computer scientists that
Self is an intelligent option.
I think comnputer scientists should be aware
of everything that is going on in the world and
know what is more evolved.
Of course since they behave rather like artists
they have very little discernment. Who loses?
Mankind of course!!!
| Albertina Lourenci |
| PhD in Architecture and Urbanism |
| post-doctorate researcher |
| Laboratory of Integrated Systems University of Sao Paulo |
| Avenida Professor Luciano Gualberto, 158 Travessa 3 |
| CEP: 05508-900 |
| Sao Paulo Sao Paulo State Brazil |
| Voice: +55 011 818 5254 |
| Fax: +55 11 211 4574 |
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