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.
2010-02-08. SMR Clean up namespace declarations so concept URI's follow CGI URN scheme;
concepts have URN, are not document fragments.
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.
2010-09-26 SMR correct URI and title for vocabulary from compositionCategory to GeologicUnitPartRole
2010-11-28 SMR replace URN with http URI 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 previous version identifiers with numeric
final tokens. Declare exactMatch a kind of owl:objectProperty. minimal representation
of equivalence of identifiers.
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.
2016-11-21 OLR regenerate SKOS-RDF file as part of migration to new vocabulary server.
No changes to terms. Minor corrections to hierarchy from the previous 2012 version.
This file contains the CGI Geologic Unit Part role vocabulary, as defined by the IUGS
Commission for Geoscience Information (CGI) Geoscience Terminology Working Group.
This vocabulary includes terms to specify the role played by a constituent part of
a geologic unit. These terms may be used to populate GeologicUnit.part.GeologicUnitPart.role,
and GeologicUnit.composition.compositionPart.role. There are terms in this vocabulary
that only apply to one or the other of these properties, but after an effort to create
two separate vocabularies, it was decided to use a single vocabulary in order to avoid
having the same concept in more than one closely related vocabulary. The duplication
of applicable concepts in the two contexts (GeologicUnit.part.GeologicUnitPart.role
and GeologicUnit.composition.compositionPart.role) arises because the model allows
representation of complex geologic unit descriptions in more than one way. A complex
geologic unit like a migmatite complex or a lithologically heterogeneous stratigraphic
unit will have many different lithologic components. The simplest approach to representing
the lithologic heterogeneity is to report a single GeologicUnit element with compositionParts
for each lithologic component; the role on these compositionParts provides information
about what kind of parts they are and perhaps something about their relationship,
along with the kinds of rock they are composed of. A more complex alternative approach
is to represent the various components each as GeologicUnit elements, each with compositionPart
links to the rock type(s) composing that part. These component GeologicUnit elements
are aggregated by GeologicUnit.part.GeologicUnitPart elements, with roles in the aggregation
for each GeologicUnit part. The benefit of the more complex approach is that additional
descriptive properties provided by the GeologicUnit content model can be assigned
to each part, as well as GeologicRelations between the parts. The role of the compositionParts
in these more 'disaggregated' GeologicUnit elements would be a simpler 'composition'
kind of role, because the heterogeneous 'whole' unit would be described in GeologicUnitParts
that are more lithologically homogeneous. Its a trade-off between simplicity and expressiveness.
This file contains the 2016 SKOS-RDF version of the CGI Geologic Unit Part Role vocabulary.
Compilation and review in MS Excel spreadsheet, converted to MS Excel for SKOS generation