I detect a need to characterize the range expression - most
important of which is whether the range is complete, or whether it
excludes (equal) tails on each end. XSD presumes a complete range is
being specified, not a subset, is the issue you're raising?
Could an
additional facet for "percentage-tails-excluded" effectively communicate
this estimate?
On 21.12.2012 10:41, Gregor Hagedorn wrote:
On 21
December 2012 19:36,
<jmcclure(a)hypergrove.com> wrote:
> The
xsd:minInclusive, xsd:maxInclusive, xsd:minExclusive and
xsd:maxExclusive facets are absolute expressions not relative +/-
expressions, in order to accommodate fast queries. These four facets
permit specification of ranges with an unspecified median and ranges
with a specified mode, inclusie or exclusive of endpoints, a six-fer.
For these reasons I believe the XSD approach is superior for specifying
value set when compared to storing the dispersion factors themselves, eg
the "3" of +/- 3.
yes, provided they are actually tied to the
semantics of min. and
maximum, which the xsd examples are. As long as
the semantics of the
proposed "value bracketing" in Wikidata is
unknown, their use is
questionable if not impossible. If I know
something is plus/minus 2
s.d. or plus minus 2 s.e. or 10 to 90 %
percentile ... I again can use
them to the benefit of the query
system. But not
without.
Gregor
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