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