On 16.12.2008, at 17:27, Kingsley Idehen wrote:
Knud et al,
I think Ravinder has started the process of fixing the current
Semantic Web layer cake :-) Which is a very good thing (imho, but
not seeking a Layer Cake discussion explosion).
I'd rather say his proposal (objects->facts->links->...) is
complementary to the current SW layer cake. It shows what is going on
conceptually, whereas the current SW cake (which I agree probably
needs to be fixed) is more of a technology stack. An interesting paper
I read related to this is:
A. Gerber, A. van der Merwe, and A. Barnard. A functional Semantic Web
architecture. In Proceedings of the 5th European Semantic Web
Conference (ESWC2008), Tenerife, Spain, pages 273–287. Springer, June
2008.
The tricky part is the interchangeable nature of "Discovery" and
"Trust" in any such scheme layer-wise. For instance, do "Discovery"
and "Trust" occupy Layers 4, 5 or either ? We ultimately want to
reason against trusted data sources, but the serendipity quotient of
discovery is a key factor re. the dynamic nature of "trusted sources".
Since I am clearly thinking and writing (aloud) at the same time, I
would suggest:
Layer 4 - Discovery (with high Serendipity Quotient)
Layer 5 - Trust (albeit inherently volatile)
Kingsley
I'm not sure discovery and trust belong in this stack at all. Not that
I don't think they are extremely important, but what I see in
Ravinder's stack is a description of the nature of data on the SW. Of
course, what I see might not be what he intended! :) The next layer
should describe how the data is different from the previous layers. As
I pointed out in a previous mail, I think this difference could be in
inferenced data vs. explicit data.
Cheers,
Knud
-------------------------------------------------
Knud Möller, MA
+353 - 91 - 495086
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Digital Enterprise Research Institute
National University of Ireland, Galway
Institiúid Taighde na Fiontraíochta Digití
Ollscoil na hÉireann, Gaillimh
