2009-07-14. Generate SKOS encoding of vocabulary from Excel spreadsheet.
2009-12-07 SMR Update metadata properties for version, creator, title, and format.
Change skos:HistoryNote to dc:source for information on origin of terms and definitions.
2009-12-07. SMR add collections for mineralogical and sedimentary petrographic categories,
improve annotation and notes on vocabulary.
2010-02-13 Add narrower relationship links by adding skos:narrower link in Protege,
defining skos:narrower as inverse of skos:broader, calculating with Pellet reasoner
to add inferred axioms, and using 'file/Export inferred axioms as ontology' in Protege.
2010-11-28 SMR Replace URN identifiers with http URI identifiers according to CGI
URI scheme (see https://www.seegrid.csiro.au/wiki/bin/view/CGIModel/PersistentIdentifiersInGeoSciMLServices)
2012-02-07 SMR update URI to replace numeric final token with English-language string
as in original URN scheme.
2012-02-27 SMR add skos:exactMatch triples to map URIs for concepts in this vocabulary
to number-token URIs in 201012 version of same concepts.
2012-11-24 SMR Update to 201211 version; add collection entity, check all pref labels
are lower case, remove owl:NamedIndividual and Owl:Thing rdf:types.
2016-11-25 OLR regenerate SKOS-RDF file as part of migration to new vocabulary server.
No changes to the previous 2012 version.
This file contains the CGI Particle Aspect Ratio vocabulary, as defined by the IUGS
Commission for Geoscience Information (CGI) Geoscience Terminology Working Group.
AspectRatio describes the geometry of particles based on the ratios of lengths of
long, intermediate and short axes of grains. Equates to sphericity in sedimentary
rocks (ie: the degree to which the shape of a particle approximates a sphere). A quantitative
specification is based on the ratio of lengths of long, intermediate and short axes
of grain shape (Sneed and Folk, 1958; Zingg, 1935). This vocabulary includes terms
for specifying average shape of some collection of particles.(eg: prolate, slightly
flattened, very bladed, equant, acicular, tabular). Numeric shape values from Sneed
and Folk (1958) are best understood by looking at the pictures of particles with the
different shapes there and in Pettijohn et al. (1972). By extension, this vocabulary
includes all concepts in this conceptScheme, as well as concepts in any previous versions
of the scheme.
This file contains the 2016 SKOS-RDF version of the CGI Particle Aspect Ratio vocabulary.
Compilation and review in MS Excel spreadsheet, converted to MS Excel for SKOS generation