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<br>
Hi Bob,<br>
<br>
I changed to words as per your suggestion but then realized that the
thing might not be 'limited to' a central index or data warehouse but
it could still be 'dependent on' a central service so I added 'or
reliant on' <br>
<br>
Roger<br>
<br>
<b>Centralization of services</b><br>
The TDWG architecture should not rely on any third party providing a
particular piece of infrastructure indefinitely. This effectively rules
out rules out the architecture being limited to or reliant on any
centralized data warehouse or indexing service beyond the hosting of
standards files by TDWG itself - possibly as part of its collaborative
infrastructure. <br>
<br>
<br>
Bob Morris wrote:
<blockquote cite="mid440C884F.9080602@cs.umb.edu" type="cite">I meant,
as written in the full sentence, "rules out the architecture being
limited to". Per commentary at end, I definitely DO NOT want to rule
out central architectures or indexing.
<br>
<br>
<br>
<br>
Bob Morris wrote:
<br>
<br>
<blockquote type="cite">Instead of your "rules out the architecture
being based on" wording, I would prefer to see "rules out the
architecture limited to":
<br>
<br>
This effectively rules out the architecture being limited to
centralized data warehouse or indexing service beyond the hosting of
standards files by TDWG itself - possibly as part of its collaborative
infrastructure.
<br>
<br>
What I really believe is that warehousing and indexing should certainly
be supported use cases, but so should be the kinds of direct queries
otherwise discussed. In fact, I suspect that what one will find is that
the warehousing and indexing requirements will come down to exactly
those for direct queries PLUS appropriate support for caching support
(e.g. data validity contracts), provenance and maybe access control.
The idea of separating those three in
<br>
discussion is appealing to me because I suspect they are orthogonal to
each other and to the other data storage and exchange issues. GBIF's
experience will be valuable about "what got left out" in expanding the
original distributed dreams (DiGIR, BioCase) into contemporary
centralized realities. Central vs. distributed information processing
and data provision is a perennial debate and in the end always seems to
come down to current network and server hardware technologies. In
various contexts, I have seen this question flip-flop many times since
my first serious programming in 1965 on an IBM 1620. (Very cool CPU
architecture: BCD arithmetic by table lookup. You loaded the arithmetic
tables into low memory. The result was that you could make the machine
do hardware arithmetic in any base up to 10. Excellent for number
theory...). It will flip again, many times in the future.
<br>
<br>
Bob
<br>
<br>
<br>
<br>
Roger Hyam wrote:
<br>
<br>
<br>
<br>
<blockquote type="cite">*Centralization of services*
<br>
The TDWG architecture should not rely on any third party providing a
particular piece of infrastructure indefinitely. This effectively rules
out the architecture being based on any centralized data warehouse or
indexing service beyond the hosting of standards files by TDWG itself -
possibly as part of its collaborative infrastructure.
<br>
<br>
<br>
Roger
<br>
<br>
<br>
I
<br>
<br>
------------------------------------------------------------------------
<br>
<br>
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<br>
<br>
<br>
<br>
</blockquote>
<br>
<br>
<br>
</blockquote>
<br>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
-------------------------------------
Roger Hyam
Technical Architect
Taxonomic Databases Working Group
-------------------------------------
<a class="moz-txt-link-freetext" href="http://www.tdwg.org">http://www.tdwg.org</a>
<a class="moz-txt-link-abbreviated" href="mailto:roger@tdwg.org">roger@tdwg.org</a>
+44 1578 722782
-------------------------------------
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