RFC001: Support versioning of modules
Status: Draft

module consumer is
  import provider
end

@base <file:///users/me/sdml/modules/consumer#> .
@prefix : <file:///users/me/sdml/modules/consumer#> .
@prefix provider: <https://example.org/projects/provider#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix sdml: <https://sdml.io/sdml-owl.ttl#> .

:   rdf:type owl:Ontology, sdml:Module ;
    rdfs:label "consumer" ;
    owl:imports provider: .

module provider
  base <https://example.org/projects/provider#>
  version "0.3.2"
is
end

module consumer is
  import provider "0.3.2"
end

{
  "base": "https://example.org/projects/",
  "entries": {
    "provider": {
      "item": {
        "relative_uri": "provider#",
        "relative_path": "src/provider.sdm"
      },
      "item": {
        "relative_uri": "provider#",
        "version": "0.3.2",
        "relative_path": "src/provider-v3.sdm"
      }
    }
  }
}

module provider
  base <https://example.org/projects/provider#>
  version <https://example.org/projects/v3/provider#>
is
end

module consumer is
  import provider <https://example.org/projects/v3/provider#>
end

module provider
  <https://example.org/projects/provider#>
  version <https://example.org/projects/v3/provider#>
is
end

module consumer is
  import provider <https://example.org/projects/v3/provider#>
end

Module
    ::= "module" Identifier ModuleBase? ModuleBody

ModuleBase
    ::= "base" Iri

ModuleBody
    ::= "is"
        ImportStatement* Annotation* Definition*
        "end"

ImportStatement
    ::= "import" ( Import | "[" Import+ "]" )

Import
    ::= MemberImport | ModuleImport

ModuleImport
    ::= Identifer

Module
    ::= "module" Identifier ModuleIri? ModuleBody

ModuleIri
    ::= Iri ( "version" Iri )?

ModuleImport
    ::= Identifer ( "=" Iri )?

{
  "uri": "https://example.org/projects/",
  "entries": {
    "provider": {
      "item": {
        "relative_uri": "provider#",
        "relative_path": "src/provider.sdm"
      },
      "item": {
        "relative_uri": "v3/provider#",
        "relative_path": "src/provider-v3.sdm"
      }
    }
  }
}