Finish 3.1.1

Gemfile

@@ -15,6 +15,7 @@ group :development, :test do
   gem 'rdf-spec',       git: "https://github.com/ruby-rdf/rdf-spec",        branch: "develop"
   gem 'rdf-isomorphic', git: "https://github.com/ruby-rdf/rdf-isomorphic",  branch: "develop"
   gem 'rdf-vocab',      git: "https://github.com/ruby-rdf/rdf-vocab",       branch: "develop"
+  gem 'rdf-xsd',        git: "https://github.com/ruby-rdf/rdf-xsd",         branch: "develop"
   gem 'sxp',            git: "https://github.com/dryruby/sxp.rb",           branch: "develop"
   gem "redcarpet",      platforms: :ruby
   gem 'simplecov',      platforms: :mri

README.md

@@ -19,6 +19,7 @@ Install with `gem install rdf-turtle`
 * Implements a complete parser for [Turtle][].
 * Compatible with Ruby >= 2.2.2.
 * Optional streaming writer, to serialize large graphs
+* Provisional support for [Turtle*][RDF*].
 
 ## Usage
 Instantiate a reader from a local file:
@@ -35,6 +36,50 @@ Write a graph to a file:
        writer << graph
     end
 
+## Turtle* (RDFStar)
+
+Both reader and writer include provisional support for [Turtle*][RDF*].
+
+Internally, an `RDF::Statement` is treated as another resource, along with `RDF::URI` and `RDF::Node`, which allows an `RDF::Statement` to have a `#subject` or `#object` which is also an `RDF::Statement`.
+
+**Note: This feature is subject to change or elimination as the standards process progresses.**
+
+### Serializing a Graph containing embedded statements
+
+    require 'rdf/turtle'
+    statement = RDF::Statement(RDF::URI('bob'), RDF::Vocab::FOAF.age, RDF::Literal(23))
+    graph = RDF::Graph.new << [statement, RDF::URI("ex:certainty"), RDF::Literal(0.9)]
+    graph.dump(:ttl, validate: false, standard_prefixes: true)
+    # => '<<<bob> foaf:age 23>> <ex:certainty> 9.0e-1 .'
+
+### Reading a Graph containing embedded statements
+
+By default, the Turtle reader will reject a document containing a subject resource.
+
+    ttl = %(
+      @prefix foaf: <http://xmlns.com/foaf/0.1/> .
+      @prefix ex: <http://example.com/> .
+      <<<bob> foaf:age 23>> ex:certainty 9.0e-1 .
+    )
+    graph = RDF::Graph.new do |graph|
+      RDF::Turtle::Reader.new(ttl) {|reader| graph << reader}
+    end
+    # => RDF::ReaderError
+
+Readers support a `rdfstar` option with either `:PG` (Property Graph) or `:SA` (Separate Assertions) modes. In `:PG` mode, statements that are used in the subject or object positions are also implicitly added to the graph:
+
+    graph = RDF::Graph.new do |graph|
+      RDF::Turtle::Reader.new(ttl, rdfstar: :PG) {|reader| graph << reader}
+    end
+    graph.count #=> 2
+
+When using the `:SA` mode, only one statement is asserted, although the reified statement is contained within the graph.
+
+    graph = RDF::Graph.new do |graph|
+      RDF::Turtle::Reader.new(ttl, rdfstar: :SA) {|reader| graph << reader}
+    end
+    graph.count #=> 1
+
 ## Documentation
 Full documentation available on [Rubydoc.info][Turtle doc]
 
@@ -133,6 +178,7 @@ A copy of the [Turtle EBNF][] and derived parser files are included in the repos
 [Backports]:    https://rubygems.org/gems/backports
 [N-Triples]:    https://www.w3.org/TR/rdf-testcases/#ntriples
 [Turtle]:       https://www.w3.org/TR/2012/WD-turtle-20120710/
+[RDF*]:         https://lists.w3.org/Archives/Public/public-rdf-star/
 [Turtle doc]:   https://rubydoc.info/github/ruby-rdf/rdf-turtle/master/file/README.md
 [Turtle EBNF]:  https://dvcs.w3.org/hg/rdf/file/default/rdf-turtle/turtle.bnf
 [Freebase Dumps]: https://developers.google.com/freebase/data

VERSION

@@ -1 +1 @@
-3.1.0
+3.1.1

etc/doap-ntriples.ttl

@@ -1,31 +1,28 @@
+@base         <https://rubygems.org/gems/rdf> .
 @prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix dc:   <http://purl.org/dc/terms/> .
-@prefix earl: <http://www.w3.org/ns/earl#> .
 @prefix foaf: <http://xmlns.com/foaf/0.1/> .
 @prefix doap: <http://usefulinc.com/ns/doap#> .
-@prefix ex:   <http://example.org/> .
-@prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .
 
-<https://rubygems.org/gems/rdf> a doap:Project ;
+<> a doap:Project ;
   doap:name          "RDF.rb" ;
   doap:homepage      <https://rubygems.org/gems/rdf> ;
-  doap:license       <http://creativecommons.org/licenses/publicdomain/> ;
+  doap:license       <https://unlicense.org/1.0/> ;
   doap:shortdesc     "A Ruby library for working with Resource Description Framework (RDF) data."@en ;
   doap:description   "RDF.rb is a pure-Ruby library for working with Resource Description Framework (RDF) data."@en ;
   doap:created       "2007-10-23" ;
-  doap:platform      "Ruby" ;
+  doap:programming-language "Ruby" ;
   doap:category      <http://dbpedia.org/resource/Resource_Description_Framework>,
                      <http://dbpedia.org/resource/Ruby_(programming_language)> ;
-  doap:implements    <https://www.w3.org/TR/rdf11-concepts/>,
-                     <https://www.w3.org/TR/n-quads/>,
-                     <https://www.w3.org/TR/n-triples/> ;
+  doap:implements    <http://www.w3.org/TR/rdf11-concepts/>,
+                     <http://www.w3.org/TR/n-quads/>,
+                     <http://www.w3.org/TR/n-triples/> ;
   doap:download-page <https://rubygems.org/gems/rdf/> ;
   doap:bug-database  <https://github.com/ruby-rdf/rdf/issues> ;
-  doap:blog          <https://ar.to/>, <http://blog.datagraph.org/> ;
-  doap:vendor        <http://datagraph.org/> ;
+  doap:blog          <https://ar.to/>, <https://greggkellogg.net/> ;
   doap:developer     <https://ar.to/#self>, <https://bhuga.net/#ben>, <https://greggkellogg.net/foaf#me> ;
-  doap:maintainer    <https://ar.to/#self>, <https://bhuga.net/#ben>, <https://greggkellogg.net/foaf#me> ;
+  doap:maintainer    <https://greggkellogg.net/foaf#me> ;
   doap:documenter    <https://ar.to/#self>, <https://bhuga.net/#ben>, <https://greggkellogg.net/foaf#me> ;
   doap:helper        [a foaf:Person ;
                       foaf:name "Călin Ardelean" ;
@@ -63,19 +60,17 @@
   foaf:mbox_sha1sum  "a033f652c84a4d73b8c26d318c2395699dd2bdfb",
                      "d0737cceb55eb7d740578d2db1bc0727e3ed49ce" ;
   foaf:homepage      <https://ar.to/> ;
-  foaf:made          <> ;
-  rdfs:isDefinedBy   <http://datagraph.org/bendiken/foaf> .
+  foaf:made          <>  .
 
 <https://bhuga.net/#ben> a foaf:Person ;
   foaf:name          "Ben Lavender" ;
   foaf:mbox          <mailto:[email protected]> ;
   foaf:mbox_sha1sum  "dbf45f4ffbd27b67aa84f02a6a31c144727d10af" ;
-  foaf:homepage      <https://bhuga.net/> ;
-  rdfs:isDefinedBy   <http://datagraph.org/bhuga/foaf> .
+  foaf:homepage      <https://bhuga.net/> .
 
 <https://greggkellogg.net/foaf#me> a foaf:Person ;
   foaf:name          "Gregg Kellogg" ;
   foaf:mbox          <mailto:[email protected]> ;
   foaf:mbox_sha1sum  "35bc44e6d0070e5ad50ccbe0d24403c96af2b9bd" ;
   foaf:homepage      <https://greggkellogg.net/>;
-  rdfs:isDefinedBy   <https://greggkellogg.net/foaf> .
+  rdfs:isDefinedBy   <https://greggkellogg.net/foaf> .

etc/doap.nt

@@ -3,7 +3,7 @@
 <https://rubygems.org/gems/rdf-turtle> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/earl#Software> .
 <https://rubygems.org/gems/rdf-turtle> <http://usefulinc.com/ns/doap#name> "RDF::Turtle" .
 <https://rubygems.org/gems/rdf-turtle> <http://usefulinc.com/ns/doap#homepage> <https://ruby-rdf.github.com/rdf-turtle> .
-<https://rubygems.org/gems/rdf-turtle> <http://usefulinc.com/ns/doap#license> <http://creativecommons.org/licenses/publicdomain/> .
+<https://rubygems.org/gems/rdf-turtle> <http://usefulinc.com/ns/doap#license> <https://unlicense.org/1.0/> .
 <https://rubygems.org/gems/rdf-turtle> <http://usefulinc.com/ns/doap#shortdesc> "Turtle reader/writer for Ruby."@en .
 <https://rubygems.org/gems/rdf-turtle> <http://usefulinc.com/ns/doap#description> "RDF::Turtle is an Turtle reader/writer for the RDF.rb library suite."@en .
 <https://rubygems.org/gems/rdf-turtle> <http://usefulinc.com/ns/doap#created> "2011-08-29"^^<http://www.w3.org/2001/XMLSchema#date> .

etc/doap.ttl

@@ -1,3 +1,4 @@
+@base         <https://rubygems.org/gems/rdf-turtle> .
 @prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix dc:   <http://purl.org/dc/terms/> .
@@ -7,18 +8,18 @@
 @prefix ex:   <http://example.org/> .
 @prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .
 
-<https://rubygems.org/gems/rdf-turtle> a doap:Project, earl:TestSubject, earl:Software ;
+<> a doap:Project, earl:TestSubject, earl:Software ;
   doap:name          "RDF::Turtle" ;
   doap:homepage      <https://ruby-rdf.github.com/rdf-turtle> ;
-  doap:license       <http://creativecommons.org/licenses/publicdomain/> ;
+  doap:license       <https://unlicense.org/1.0/> ;
   doap:shortdesc     "Turtle reader/writer for Ruby."@en ;
   doap:description   "RDF::Turtle is an Turtle reader/writer for the RDF.rb library suite."@en ;
   doap:created       "2011-08-29"^^xsd:date ;
   doap:programming-language "Ruby" ;
   doap:implements    <https://www.w3.org/TR/turtle/> ;
   doap:category      <http://dbpedia.org/resource/Resource_Description_Framework>,
                      <http://dbpedia.org/resource/Ruby_(programming_language)> ;
-  doap:download-page <https://rubygems.org/gems/rdf-turtle> ;
+  doap:download-page <> ;
   doap:mailing-list  <https://lists.w3.org/Archives/Public/public-rdf-ruby/> ;
   doap:bug-database  <https://github.com/ruby-rdf/rdf-turtle/issues> ;
   doap:blog          <https://greggkellogg.net/> ;