Dear Sterling,
At 12:35 PM 10/8/2006, you wrote:
How would you cite the technique "micro-pipelining".
Piez, Wendell: Micro-pipeline (technique to create and process
the tree created)", cited in XSL-List(_at_)lists(_dot_)mulberrytech(_dot_)com,
subject = programmatic nodeset builds for passing to another
template", Oct 6, 2006.
That's very kind, although I'm not sure it's absolutely necessary.
but when and who invented the technique "micro-pipeline"?
maybe many people did different components?
is there an existing|applied_for patent on any of it,
or does the technique reside in the public domain?
I dare say it's been reinvented many times, sometimes by accident (I
know of at least one case where that's happened).
If you go back into the archives of this list, you'll find much
discussion of the difference in XSLT 1.0 between a
result-tree-fragment and a node set, and the utility of being able to
treat an RTF (which in XSLT 2.0 becomes a "temporary tree") as a set
of nodes. Unfortunately I don't have the time to dig out particular
citations, but they're in there, especially as awareness grew (from
1999) of how powerful the technique is and how useful an extension
function is that provides a way to do it. Even the original designers
of XSLT 1.0 were aware that the technique is possible and potentially
useful, as they took the trouble explicitly to prohibit it (for
reasons that were later decided to be insufficient, as the
restriction was later removed).
So-called "micropipelining" is merely an application of this method
at a low level instead of at the document level.
As for IP rights to it -- I'm no expert (in either law or CS :-), but
I dare say this falls squarely in the realm of the "obvious" or at
least of "prior art", particularly as such recursive operations are
fundamental to certain programming paradigms such as functional programming.
Regards,
Wendell
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