PhySH 1.0.0

CHANGELOG.md

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+# PhySH Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [1.0.0] - 2018-06-13
+### Added
+- Initial release

LICENSE.md

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+The creators waive copyright and related rights in the PhySH concept
+scheme (all files in this repository) worldwide through the [CC0 1.0
+Universal public domain dedication](https://creativecommons.org/publicdomain/zero/1.0/).

README.md

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+# [PhySH - Physics Subject Headings](https://physh.org/)
+
+PhySH is provided in RDF largely using the entities and relationships defined by [SKOS](https://www.w3.org/2009/08/skos-reference/skos.html). We have added to the RDF vocabulary using a custom ontology with canonical URI  https://physh.org/rdf/2018/01/01/core# (prefix "physh_rdf" in what follows) - this defines the following classes:
+
+- `physh_rdf:Discipline` as type for disciplines; these are also of type skos:ConceptScheme
+- `physh_rdf:Facet` as type for facets; these are also of type skos:Concept
+- `physh_rdf:Concept` skos:Concept's that are *not* facets.
+
+and the following properties:
+
+- `physh_rdf:contains` - facet contains this concept
+- `physh_rdf:deprecated` - concept should no longer be used
+- `physh_rdf:excludeFromIndexing` - concept should not be returned as a search result 
+- `physh_rdf:hasConcept` - discipline has this concept
+- `physh_rdf:inDiscipline` - concept is in a particular discipline
+- `physh_rdf:inFacet` - concept is in a particular facet
+- `physh_rdf:prefLabel` - like skos:prefLabel, but applies to concept schemes also
+- `physh_rdf:usedByDiscipline` - facet is used by this discipline
+- `physh_rdf:usesFacet` - discipline uses this facet
+
+Note that `contains` and `inFacet` are inverses, as are `hasConcept` and `inDiscipline`, and `usedByDiscipline` and `usesFacet`; the PhySH RDF files include both sides of these relations. We also use the Dublin core terms vocabulary (http://purl.org/dc/terms/ - dcterms) to provide metadata for the concept schemes/disciplines.