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# Copyright (C) 2015  Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program.  If not, see <http://www.gnu.org/licenses/>.


# This schema describes the Baserock data model. It describes how the data
# can be represented in computer memory, it doesn't specify anything about
# how it should be stored on disk or transferred.
#
# Please see README.schemas, and http://wiki.baserock.org/definitions/current/
# for more information.
#
# This is not a brilliant schema, in Linked Data terms, because it's using
# Baserock-specific terminology and a rigid layout, instead of being a generic
# vocabulary for describing how to assemble software. However, it maps closely
# to the format that the existing Baserock reference system definitions use.
# We hope to produce a simpler and more flexible 2.x version of this schema in
# future.


# Partial OWL and RDF Schema glossary:
#
# domain: the set of objects that a can have a property.
# range: the set of possible values for a property.
#
# ObjectProperty:
#   a property whose value must be another resource.
# DatatypeProperty:
#   a property whose value is one of the datatype defined by XML Schema ("xsd")
# FunctionalProperty:
#   a property which can only have one value per resource
# InverseFunctionalProperty:
#   a property which can only have one resource per value


# Metadata

@prefix : <http://baserock.org/definitions/example-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix dc: <http://purl.org/dc/elements/1.1/> .

: a owl:Ontology ;
  dc:title "Schema for Baserock data model" ;
  dc:creator "The Baserock Project" ;
  # Versioned according to Semantic Versioning http://www.semver.org/
  owl:versionInfo "0.9.0" .


## Entities

# Source definitions

:Morphology a owl:Class ;
   rdfs:comment "A definition file." .

:Cluster a owl:Class ;
   rdfs:subClassOf :Morphology ;
   rdfs:comment "Instructions for deploying one or systems." ;
   owl:disjointWith :System, :Stratum, :Chunk .

:System a owl:Class ;
   rdfs:subClassOf :Morphology ;
   rdfs:comment "A collection of strata in a form that can be executed." ;
   owl:disjointWith :Cluster, :Stratum, :Chunk .

:Stratum a owl:Class ;
   rdfs:subClassOf :Morphology ;
   rdfs:comment "A set of related chunks." ;
   owl:disjointWith :Cluster, :System, :Chunk .

:Chunk a owl:Class ;
   rdfs:subClassOf :Morphology ;
   rdfs:comment "An individual component, that can be built from a Git repository." ;
   owl:disjointWith :Cluster, :System, :Stratum .

# Container contents

:SystemDeployment a owl:Class ;
   rdfs:comment "Information for deploying one system of a cluster." .

:ChunkReference a owl:Class ;
   rdfs:comment "An instance of a chunk within a stratum." .

# Products (for artifact split rules).

:Artifact a owl:Class ;
   rdfs:comment "One part of the result of building a morphology. The output of a build is split according to patterns, so there are multiple artifacts produced for a given source." .

:StratumArtifact a owl:Class ;
   rdfs:subClassOf :Artifact ;
   rdfs:comment "Part of the result of building a stratum." ;
   owl:disjointWith :ChunkArtifact.

:ChunkArtifact a owl:Class ;
   rdfs:subClassOf :Artifact ;
   rdfs:comment "Part of the result of building a chunk." ;
   owl:disjointWith :StratumArtifact.


## Shared properties

# 'name' becomes part of the URL when we import definition .morph files as RDF,
# so it doesn't need a property.

# Use dc:description for 'description', see:
# http://dublincore.org/documents/2012/06/14/dcmi-terms/?v=terms#terms-description


## Cluster-specific properties

:containsSystemDeployment a owl:ObjectProperty ;
  rdfs:domain :Cluster ;
  rdfs:range :SystemDeployment ;
  owl:minCardinality 1 .


## SystemDeployment-specific properties

:deploysSystem a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :SystemDeployment ;
  rdfs:range :System .

:hasLabel a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :SystemDeployment ;
  rdfs:range xsd:string .

:hasType a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :SystemDeployment ;
  rdfs:range xsd:string ;
  rdfs:comment "The .write extension used to perform the deployment." .

:hasLocation a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :SystemDeployment ;
  rdfs:range xsd:string ;
  rdfs:comment "Deployment location. This is passed to the selected .write extension" .

# FIXME: this is actually a key-value mapping, how do you do that in RDF properly?
:hasConfigurationSetting a owl:DatatypeProperty ;
  rdfs:domain :SystemDeployment ;
  rdfs:range xsd:string ;
  rdfs:comment "Arbitrary key=value pair that is set in the environment of the .configure and .write extensions during deployment." .


## System-specific properties

:containsStratumArtifact a owl:ObjectProperty ;
  rdfs:domain :System ;
  rdfs:range :StratumArtifact ;
  owl:minCardinality 1 .

# A build tool will only understand a certain set of architectures, but I think
# that should not be part of the data model.
:hasArchitecture a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :System ;
  rdfs:range xsd:string .

:hasConfigurationExtension a owl:DatatypeProperty ;
  rdfs:domain :System ;
  rdfs:range xsd:string ;
  rdfs:comment "A .configure extension to be run when with system is deployed." .


## Stratum-specific properties

:producesStratumArtifact a owl:ObjectProperty , rdf:Seq ;
  rdfs:domain :Stratum ;
  rdfs:range :StratumArtifact ;
  rdfs:comment "iDescribes how this artifact is split once all chunks are built." .

:hasStratumBuildDependency a owl:ObjectProperty ;
  rdfs:domain :Stratum ;
  rdfs:range :Stratum .

:containsChunkReference a owl:ObjectProperty ;
  rdfs:domain :Stratum ;
  rdfs:range :ChunkReference ;
  owl:minCardinality 1 .


## ChunkReference-specific properties

:refersToChunk a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :ChunkReference ;
  rdfs:range :Chunk .

:repo a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :ChunkReference ;
  rdfs:range xsd:string ;
  rdfs:comment "Git repo that this chunk's build instructions should be run in. Can be a keyed URL according to the repo-alias mapping, which isn't currently defined in this data model." .

:ref a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :ChunkReference ;
  rdfs:range xsd:string ;
  rdfs:comment "Ref of the Git repo that should be checked out before building. Usually a SHA1." .

:unpetrifyRef a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :ChunkReference ;
  rdfs:range xsd:string ;
  rdfs:comment "Name of the ref that should be checked out (useful when 'ref' is a SHA1 to keep track of the actual branch/tag name)." .

:hasChunkBuildDependency a owl:ObjectProperty ;
  rdfs:domain :ChunkReference ;
  rdfs:range :Chunk .

:prefix a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :ChunkReference ;
  rdfs:range xsd:string ;
  rdfs:comment "Value of the PREFIX environment variable in the build environment (defaults to /usr)" .

# FIXME: it's possible to specify in OWL that 'bootstrap' and 'normal' are the
# only valid values.
:buildMode a owl:DatatypeProperty , owl:FunctionalProperty ;
  rdfs:domain :ChunkReference ;
  rdfs:range xsd:string .


## Chunk-specific properties

# build-system isn't included here, as it overlaps with the *-commands
# fields in an unfortunate way.

# Note that representing lists of things in RDF is a bit of a pain.
# http://smiy.sourceforge.net/olo/spec/orderedlistontology.html might
# be worth investigating.

:producesChunkArtifact a owl:ObjectProperty , rdf:Seq ;
  rdfs:domain :Chunk ;
  rdfs:range :ChunkArtifact ;
  rdfs:comment "Describes how this artifact is split once built." .

:maxJobs a owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range xsd:integer ;
  rdfs:comment "Number of parallel jobs that can be run for this chunk. Only useful if set to 1, to mark components which have Makefiles that do not work with `make -j N`."

:CommandSequence a owl:Class ;
  rdfs:subClassOf rdf:Seq ;
  rdfs:comment "An ordered sequence of commands." .

:preConfigureCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:configureCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:postConfigureCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:preBuildCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:buildCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:postBuildCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:preInstallCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:installCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .

:postInstallCommands a owl:ObjectProperty , owl:FunctionalProperty ;
  rdfs:domain :Chunk ;
  rdfs:range :CommandSequence .


# Artifact properties

:includes a owl:DatatypeProperty , rdf:Seq ;
  rdfs:domain :Artifact ;
  rdfs:range xsd:string ;
  rdfs:comment "A regular expression pattern. The results of a build are matched against this pattern and any that match will be included in that artifact." .