diff --git a/lib/rdf/serializations/turtle_decoder.ex b/lib/rdf/serializations/turtle_decoder.ex
index 9308ebf..38027b1 100644
--- a/lib/rdf/serializations/turtle_decoder.ex
+++ b/lib/rdf/serializations/turtle_decoder.ex
@@ -69,9 +69,8 @@ defmodule RDF.Turtle.Decoder do
     {graph, %State{namespaces: namespaces, base_iri: base_iri}} =
       Enum.reduce(ast, {RDF.Graph.new(), %State{base_iri: base_iri}}, fn
         {:triples, triples_ast}, {graph, state} ->
-          with {statements, state} = triples(triples_ast, state) do
-            {RDF.Graph.add(graph, statements), state}
-          end
+          {statements, state} = triples(triples_ast, state)
+          {RDF.Graph.add(graph, statements), state}
 
         {:directive, directive_ast}, {graph, state} ->
           {graph, directive(directive_ast, state)}
@@ -89,49 +88,49 @@ defmodule RDF.Turtle.Decoder do
   end
 
   defp directive({:prefix, {:prefix_ns, _, ns}, iri}, state) do
-    if IRI.absolute?(iri) do
-      State.add_namespace(state, ns, iri)
-    else
-      with absolute_iri = IRI.absolute(iri, state.base_iri) do
-        State.add_namespace(state, ns, to_string(absolute_iri))
+    absolute_iri =
+      if IRI.absolute?(iri) do
+        iri
+      else
+        iri |> IRI.absolute(state.base_iri) |> to_string()
       end
-    end
+
+    State.add_namespace(state, ns, absolute_iri)
   end
 
   defp directive({:base, iri}, %State{base_iri: base_iri} = state) do
     cond do
-      IRI.absolute?(iri) ->
-        %State{state | base_iri: RDF.iri(iri)}
-
-      base_iri != nil ->
-        with absolute_iri = IRI.absolute(iri, base_iri) do
-          %State{state | base_iri: absolute_iri}
-        end
-
-      true ->
-        raise "Could not resolve relative IRI '#{iri}', no base iri provided"
+      IRI.absolute?(iri) -> %State{state | base_iri: RDF.iri(iri)}
+      not is_nil(base_iri) -> %State{state | base_iri: IRI.absolute(iri, base_iri)}
+      true -> raise "Could not resolve relative IRI '#{iri}', no base iri provided"
     end
   end
 
   defp triples({:blankNodePropertyList, _} = ast, state) do
-    with {_, statements, state} = resolve_node(ast, [], state) do
-      {statements, state}
-    end
+    {_, statements, state} = resolve_node(ast, [], state)
+    {statements, state}
   end
 
   defp triples({subject, predications}, state) do
-    with {subject, statements, state} = resolve_node(subject, [], state) do
-      Enum.reduce(predications, {statements, state}, fn {predicate, objects},
-                                                        {statements, state} ->
-        with {predicate, statements, state} = resolve_node(predicate, statements, state) do
-          Enum.reduce(objects, {statements, state}, fn object, {statements, state} ->
-            with {object, statements, state} = resolve_node(object, statements, state) do
-              {[{subject, predicate, object} | statements], state}
-            end
-          end)
-        end
-      end)
-    end
+    {subject, statements, state} = resolve_node(subject, [], state)
+
+    predications(subject, predications, statements, state)
+  end
+
+  defp predications(subject, predications, statements, state) do
+    Enum.reduce(predications, {statements, state}, fn
+      {predicate, objects}, {statements, state} ->
+        {predicate, statements, state} = resolve_node(predicate, statements, state)
+
+        Enum.reduce(objects, {statements, state}, fn
+          {:annotation, annotation}, {[last_statement | _] = statements, state} ->
+            predications(last_statement, annotation, statements, state)
+
+          object, {statements, state} ->
+            {object, statements, state} = resolve_node(object, statements, state)
+            {[{subject, predicate, object} | statements], state}
+        end)
+    end)
   end
 
   defp resolve_node({:prefix_ln, line_number, {prefix, name}}, statements, state) do
@@ -159,16 +158,14 @@ defmodule RDF.Turtle.Decoder do
   end
 
   defp resolve_node({:anon}, statements, state) do
-    with {node, state} = State.next_bnode(state) do
-      {node, statements, state}
-    end
+    {node, state} = State.next_bnode(state)
+    {node, statements, state}
   end
 
   defp resolve_node({:blankNodePropertyList, property_list}, statements, state) do
-    with {subject, state} = State.next_bnode(state),
-         {new_statements, state} = triples({subject, property_list}, state) do
-      {subject, statements ++ new_statements, state}
-    end
+    {subject, state} = State.next_bnode(state)
+    {new_statements, state} = triples({subject, property_list}, state)
+    {subject, statements ++ new_statements, state}
   end
 
   defp resolve_node(
@@ -176,9 +173,8 @@ defmodule RDF.Turtle.Decoder do
          statements,
          state
        ) do
-    with {datatype, statements, state} = resolve_node(datatype, statements, state) do
-      {RDF.literal(value, datatype: datatype), statements, state}
-    end
+    {datatype, statements, state} = resolve_node(datatype, statements, state)
+    {RDF.literal(value, datatype: datatype), statements, state}
   end
 
   defp resolve_node({:collection, []}, statements, state) do
@@ -186,29 +182,36 @@ defmodule RDF.Turtle.Decoder do
   end
 
   defp resolve_node({:collection, elements}, statements, state) do
-    with {first_list_node, state} = State.next_bnode(state),
-         [first_element | rest_elements] = elements,
-         {first_element_node, statements, state} = resolve_node(first_element, statements, state),
-         first_statement = [{first_list_node, RDF.first(), first_element_node}] do
-      {last_list_node, statements, state} =
-        Enum.reduce(
-          rest_elements,
-          {first_list_node, statements ++ first_statement, state},
-          fn element, {list_node, statements, state} ->
-            with {element_node, statements, state} = resolve_node(element, statements, state),
-                 {next_list_node, state} = State.next_bnode(state) do
-              {next_list_node,
-               statements ++
-                 [
-                   {list_node, RDF.rest(), next_list_node},
-                   {next_list_node, RDF.first(), element_node}
-                 ], state}
-            end
-          end
-        )
+    {first_list_node, state} = State.next_bnode(state)
+    [first_element | rest_elements] = elements
+    {first_element_node, statements, state} = resolve_node(first_element, statements, state)
+    first_statement = [{first_list_node, RDF.first(), first_element_node}]
 
-      {first_list_node, statements ++ [{last_list_node, RDF.rest(), RDF.nil()}], state}
-    end
+    {last_list_node, statements, state} =
+      Enum.reduce(
+        rest_elements,
+        {first_list_node, statements ++ first_statement, state},
+        fn element, {list_node, statements, state} ->
+          {element_node, statements, state} = resolve_node(element, statements, state)
+          {next_list_node, state} = State.next_bnode(state)
+
+          {next_list_node,
+           statements ++
+             [
+               {list_node, RDF.rest(), next_list_node},
+               {next_list_node, RDF.first(), element_node}
+             ], state}
+        end
+      )
+
+    {first_list_node, statements ++ [{last_list_node, RDF.rest(), RDF.nil()}], state}
+  end
+
+  defp resolve_node({:quoted_triple, s_node, p_node, o_node}, statements, state) do
+    {subject, statements, state} = resolve_node(s_node, statements, state)
+    {predicate, statements, state} = resolve_node(p_node, statements, state)
+    {object, statements, state} = resolve_node(o_node, statements, state)
+    {{subject, predicate, object}, statements, state}
   end
 
   defp resolve_node(node, statements, state), do: {node, statements, state}
diff --git a/src/turtle_lexer.xrl b/src/turtle_lexer.xrl
index 7e1c614..f291484 100644
--- a/src/turtle_lexer.xrl
+++ b/src/turtle_lexer.xrl
@@ -70,6 +70,10 @@ a                                  : {token, {'a', TokenLine}}.
 \(	                               : {token, {'(', TokenLine}}.
 \)	                               : {token, {')', TokenLine}}.
 \^\^	                             : {token, {'^^', TokenLine}}.
+\<\<           	                   : {token, {'<<', TokenLine}}.
+\>\>           	                   : {token, {'>>', TokenLine}}.
+\{\|           	                   : {token, {'{|', TokenLine}}.
+\|\}           	                   : {token, {'|}', TokenLine}}.
 
 {WS}+                              : skip_token.
 {COMMENT}                          : skip_token.
diff --git a/src/turtle_parser.yrl b/src/turtle_parser.yrl
index d78b977..885daee 100644
--- a/src/turtle_parser.yrl
+++ b/src/turtle_parser.yrl
@@ -3,11 +3,13 @@
 Nonterminals turtleDoc statement directive prefixID base sparqlPrefix sparqlBase
   triples predicateObjectList objectList blankNodePropertyList semicolonSequence
   verb subject predicate object collection collection_elements
-  literal numericLiteral rdfLiteral booleanLiteral iri prefixedName blankNode.
+  literal numericLiteral rdfLiteral booleanLiteral iri prefixedName blankNode
+  annotation quotedTriple qtSubject qtObject .
 
 Terminals prefix_ns prefix_ln iriref blank_node_label anon
   string_literal_quote langtag integer decimal double boolean
-  '.' ';' ',' '[' ']' '(' ')' '^^' '@prefix' '@base' 'PREFIX' 'BASE' 'a' .
+  '.' ';' ',' '[' ']' '(' ')' '^^' '@prefix' '@base' 'PREFIX' 'BASE' 'a'
+  '<<' '>>' '{|' '|}' .
 
 Rootsymbol turtleDoc.
 
@@ -37,10 +39,11 @@ predicateObjectList -> verb objectList semicolonSequence : [{'$1', '$2'}] .
 predicateObjectList -> verb objectList semicolonSequence predicateObjectList : [{'$1', '$2'} | '$4'] .
 semicolonSequence -> ';' .
 semicolonSequence -> ';' semicolonSequence .
-%%: '$1' .
 
 objectList -> object                : ['$1'] .
 objectList -> object ',' objectList : ['$1' | '$3'] .
+objectList -> object annotation : ['$1', {annotation, '$2'}] .
+objectList -> object annotation ',' objectList : ['$1', {annotation, '$2'} | '$4'] .
 
 blankNodePropertyList -> '[' predicateObjectList ']' : {blankNodePropertyList, '$2'} .
 
@@ -49,12 +52,24 @@ verb      -> predicate              : '$1' .
 subject   -> iri                    : '$1' .
 subject   -> blankNode              : '$1' .
 subject   -> collection             : '$1' .
+subject   -> quotedTriple           : '$1' .
 predicate -> iri                    : '$1' .
 object    -> iri                    : '$1' .
 object    -> blankNode              : '$1' .
 object    -> collection             : '$1' .
 object    -> blankNodePropertyList  : '$1' .
 object    -> literal                : '$1' .
+object    -> quotedTriple           : '$1' .
+
+quotedTriple -> '<<' qtSubject verb qtObject '>>' : {quoted_triple, '$2',  '$3',  '$4' } .
+qtSubject -> iri : '$1' .
+qtSubject -> blankNode : '$1' .
+qtSubject -> quotedTriple : '$1' .
+qtObject  -> iri : '$1' .
+qtObject  -> blankNode : '$1' .
+qtObject  -> literal : '$1' .
+qtObject  -> quotedTriple : '$1' .
+annotation -> '{|' predicateObjectList '|}' : '$2' .
 
 collection -> '(' ')'                     : {collection, []} .
 collection -> '(' collection_elements ')' : {collection, '$2'} .
diff --git a/test/acceptance/turtle_star_w3c_eval_test.exs b/test/acceptance/turtle_star_w3c_eval_test.exs
new file mode 100644
index 0000000..4ebc216
--- /dev/null
+++ b/test/acceptance/turtle_star_w3c_eval_test.exs
@@ -0,0 +1,40 @@
+defmodule RDF.Star.Turtle.W3C.EvalTest do
+  @moduledoc """
+  The official RDF-star Turtle eval test suite.
+
+  from <https://w3c.github.io/rdf-star/tests/turtle/eval/>
+  """
+
+  use ExUnit.Case, async: false
+
+  @turtle_star_eval_test_suite Path.join(RDF.TestData.dir(), "rdf-star/turtle/eval")
+
+  ExUnit.Case.register_attribute(__ENV__, :turtle_test)
+
+  @turtle_star_eval_test_suite
+  |> File.ls!()
+  |> Enum.filter(fn file -> Path.extname(file) == ".ttl" and file != "manifest.ttl" end)
+  |> Enum.each(fn file ->
+    base = Path.basename(file, ".ttl")
+
+    if base in [
+         "turtle-star-eval-bnode-1",
+         "turtle-star-eval-bnode-2",
+         # TODO: this one just fails, because our blank node counter starts at 0 instead of 1
+         "turtle-star-eval-annotation-2"
+       ] do
+      @tag skip: """
+           The produced graphs are correct, but have different blank node labels than the result graph.
+           TODO: Implement a graph isomorphism algorithm.
+           """
+    end
+
+    @turtle_test ttl_file: Path.join(@turtle_star_eval_test_suite, file),
+                 nt_file: Path.join(@turtle_star_eval_test_suite, base <> ".nt")
+    test "eval test: #{file}", context do
+      assert RDF.Turtle.read_file!(context.registered.turtle_test[:ttl_file])
+             |> RDF.Graph.clear_metadata() ==
+               RDF.NTriples.read_file!(context.registered.turtle_test[:nt_file])
+    end
+  end)
+end
diff --git a/test/acceptance/turtle_star_w3c_syntax_test.exs b/test/acceptance/turtle_star_w3c_syntax_test.exs
new file mode 100644
index 0000000..2266500
--- /dev/null
+++ b/test/acceptance/turtle_star_w3c_syntax_test.exs
@@ -0,0 +1,29 @@
+defmodule RDF.Star.Turtle.W3C.SyntaxTest do
+  @moduledoc """
+  The official RDF-star Turtle syntax test suite.
+
+  from <https://w3c.github.io/rdf-star/tests/turtle/syntax/>
+  """
+
+  use ExUnit.Case, async: false
+
+  @turtle_star_syntax_test_suite Path.join(RDF.TestData.dir(), "rdf-star/turtle/syntax")
+
+  ExUnit.Case.register_attribute(__ENV__, :turtle_test)
+
+  @turtle_star_syntax_test_suite
+  |> File.ls!()
+  |> Enum.filter(fn file -> Path.extname(file) == ".ttl" and file != "manifest.ttl" end)
+  |> Enum.each(fn file ->
+    @turtle_test file: Path.join(@turtle_star_syntax_test_suite, file)
+    if file |> String.contains?("-bad-") do
+      test "Negative syntax test: #{file}", context do
+        assert {:error, _} = RDF.Turtle.read_file(context.registered.turtle_test[:file])
+      end
+    else
+      test "Positive syntax test: #{file}", context do
+        assert {:ok, %RDF.Graph{}} = RDF.Turtle.read_file(context.registered.turtle_test[:file])
+      end
+    end
+  end)
+end
diff --git a/test/data/rdf-star/turtle/eval/manifest.ttl b/test/data/rdf-star/turtle/eval/manifest.ttl
new file mode 100644
index 0000000..d9ac334
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/manifest.ttl
@@ -0,0 +1,101 @@
+## Distributed under both the "W3C Test Suite License" [1]
+## and the "W3C 3-clause BSD License".
+## [1] https://www.w3.org/Consortium/Legal/2008/04-testsuite-license
+## [2] https://www.w3.org/Consortium/Legal/2008/03-bsd-license
+
+PREFIX rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX rdfs:   <http://www.w3.org/2000/01/rdf-schema#>
+PREFIX mf:     <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#>
+PREFIX test:   <http://www.w3.org/2001/sw/DataAccess/tests/>
+PREFIX rdft:   <http://www.w3.org/ns/rdftest#>
+PREFIX trs:    <https://w3c.github.io/rdf-star/tests/turtle/eval#>
+
+trs:manifest  rdf:type mf:Manifest ;
+    rdfs:label "Turtle-star Evaluation Tests" ;
+    mf:entries
+    (
+        trs:turtle-star-1
+        trs:turtle-star-2
+        trs:turtle-star-bnode-1
+        trs:turtle-star-bnode-2
+        trs:turtle-star-annotation-1
+        trs:turtle-star-annotation-2
+        trs:turtle-star-annotation-3
+        trs:turtle-star-annotation-4
+        trs:turtle-star-annotation-5
+        trs:turtle-star-quoted-annotation-1
+        trs:turtle-star-quoted-annotation-2
+        trs:turtle-star-quoted-annotation-3
+    ) .
+
+trs:turtle-star-1 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - subject quoted triple" ;
+   mf:action    <turtle-star-eval-01.ttl> ;
+   mf:result    <turtle-star-eval-01.nt> ;
+   .
+
+trs:turtle-star-2 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - object quoted triple" ;
+   mf:action    <turtle-star-eval-02.ttl> ;
+   mf:result    <turtle-star-eval-02.nt> ;
+   .
+
+trs:turtle-star-bnode-1 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - blank node label" ;
+   mf:action    <turtle-star-eval-bnode-1.ttl> ;
+   mf:result    <turtle-star-eval-bnode-1.nt> ;
+   .
+   
+trs:turtle-star-bnode-2 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - blank node labels" ;
+   mf:action    <turtle-star-eval-bnode-2.ttl> ;
+   mf:result    <turtle-star-eval-bnode-2.nt> ;
+   .
+
+trs:turtle-star-annotation-1 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation form" ;
+   mf:action    <turtle-star-eval-annotation-1.ttl> ;
+   mf:result    <turtle-star-eval-annotation-1.nt> ;
+   .
+   
+trs:turtle-star-annotation-2 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation example" ;
+   mf:action    <turtle-star-eval-annotation-2.ttl> ;
+   mf:result    <turtle-star-eval-annotation-2.nt> ;
+   .
+   
+trs:turtle-star-annotation-3 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation - predicate and object lists" ;
+   mf:action    <turtle-star-eval-annotation-3.ttl> ;
+   mf:result    <turtle-star-eval-annotation-3.nt> ;
+   .
+   
+trs:turtle-star-annotation-4 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation - nested" ;
+   mf:action    <turtle-star-eval-annotation-4.ttl> ;
+   mf:result    <turtle-star-eval-annotation-4.nt> ;
+   .
+   
+trs:turtle-star-annotation-5 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation object list" ;
+   mf:action    <turtle-star-eval-annotation-5.ttl> ;
+   mf:result    <turtle-star-eval-annotation-5.nt> ;
+   .
+
+trs:turtle-star-quoted-annotation-1 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation with quoting" ;
+   mf:action    <turtle-star-eval-quoted-annotation-1.ttl> ;
+   mf:result    <turtle-star-eval-quoted-annotation-1.nt> ;
+   .
+   
+trs:turtle-star-quoted-annotation-2 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation on triple with quoted subject" ;
+   mf:action    <turtle-star-eval-quoted-annotation-2.ttl> ;
+   mf:result    <turtle-star-eval-quoted-annotation-2.nt> ;
+   .
+   
+trs:turtle-star-quoted-annotation-3 rdf:type rdft:TestTurtleEval ;
+   mf:name      "Turtle-star - Annotation on triple with quoted object" ;
+   mf:action    <turtle-star-eval-quoted-annotation-3.ttl> ;
+   mf:result    <turtle-star-eval-quoted-annotation-3.nt> ;
+   .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-01.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-01.nt
new file mode 100644
index 0000000..7f2be99
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-01.nt
@@ -0,0 +1 @@
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/q> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-01.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-01.ttl
new file mode 100644
index 0000000..ad4940b
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-01.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+<<:s :p :o>> :q :z .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-02.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-02.nt
new file mode 100644
index 0000000..28f1501
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-02.nt
@@ -0,0 +1 @@
+<http://example/a> <http://example/q> << <http://example/s> <http://example/p> <http://example/o> >> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-02.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-02.ttl
new file mode 100644
index 0000000..6e76ac6
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-02.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:a :q <<:s :p :o>> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-1.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-1.nt
new file mode 100644
index 0000000..8165c58
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-1.nt
@@ -0,0 +1,2 @@
+<http://example/s> <http://example/p> <http://example/o> .
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/r> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-1.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-1.ttl
new file mode 100644
index 0000000..fdba9df
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-1.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:s :p :o {| :r :z |} .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-2.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-2.nt
new file mode 100644
index 0000000..87450c5
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-2.nt
@@ -0,0 +1,7 @@
+<http://example/s> <http://example/p> <http://example/o> .
+_:b1 <http://example/graph> <http://host1/> .
+_:b1 <http://example/date> "2020-01-20"^^<http://www.w3.org/2001/XMLSchema#date> .
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/source> _:b1 .
+_:b2 <http://example/graph> <http://host2/> .
+_:b2 <http://example/date> "2020-12-31"^^<http://www.w3.org/2001/XMLSchema#date> .
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/source> _:b2 .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-2.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-2.ttl
new file mode 100644
index 0000000..06ef8ea
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-2.ttl
@@ -0,0 +1,10 @@
+PREFIX :       <http://example/>
+PREFIX xsd:     <http://www.w3.org/2001/XMLSchema#>
+
+:s :p :o {| :source [ :graph <http://host1/> ;
+                      :date "2020-01-20"^^xsd:date
+                    ] ;
+            :source [ :graph <http://host2/> ;
+                      :date "2020-12-31"^^xsd:date
+                    ]
+          |} .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-3.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-3.nt
new file mode 100644
index 0000000..af17aa5
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-3.nt
@@ -0,0 +1,6 @@
+<http://example/s> <http://example/p> <http://example/o> .
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/a> <http://example/b> .
+<http://example/s> <http://example/p2> <http://example/o2> .
+<< <http://example/s> <http://example/p2> <http://example/o2> >> <http://example/a2> <http://example/b2> .
+<http://example/s> <http://example/p2> <http://example/o3> .
+<< <http://example/s> <http://example/p2> <http://example/o3> >> <http://example/a3> <http://example/b3> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-3.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-3.ttl
new file mode 100644
index 0000000..8b2bbd6
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-3.ttl
@@ -0,0 +1,5 @@
+PREFIX : <http://example/>
+
+:s :p :o {| :a :b |};
+    :p2 :o2 {| :a2 :b2 |},
+        :o3 {| :a3 :b3 |}.
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-4.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-4.nt
new file mode 100644
index 0000000..4bf32e2
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-4.nt
@@ -0,0 +1,3 @@
+<http://example/s> <http://example/p> <http://example/o> .
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/a> <http://example/b> .
+<< << <http://example/s> <http://example/p> <http://example/o> >> <http://example/a> <http://example/b> >> <http://example/a2> <http://example/b2> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-4.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-4.ttl
new file mode 100644
index 0000000..c07c701
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-4.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:s :p :o {| :a :b {| :a2 :b2 |} |}.
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-5.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-5.nt
new file mode 100644
index 0000000..1238d92
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-5.nt
@@ -0,0 +1,3 @@
+<http://example/s> <http://example/p> <http://example/o1> .
+<http://example/s> <http://example/p> <http://example/o2> .
+<< <http://example/s> <http://example/p> <http://example/o2> >> <http://example/a> <http://example/b> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-5.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-5.ttl
new file mode 100644
index 0000000..751dc67
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-annotation-5.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p :o1, :o2 {| :a :b |} .
+
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-1.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-1.nt
new file mode 100644
index 0000000..dcd268d
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-1.nt
@@ -0,0 +1,2 @@
+_:b9 <http://example/p> <http://example/o> .
+<< _:b9 <http://example/p> <http://example/o> >> <http://example/q> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-1.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-1.ttl
new file mode 100644
index 0000000..a2c01ff
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-1.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+_:b :p :o .
+<<_:b :p :o>> :q :z .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-2.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-2.nt
new file mode 100644
index 0000000..42dcac5
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-2.nt
@@ -0,0 +1,2 @@
+_:label1 <http://example/p1> _:label1 .
+<< _:label1 <http://example/p1> _:label1 >> <http://example/q> << _:label1 <http://example/p2> <http://example/o> >> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-2.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-2.ttl
new file mode 100644
index 0000000..8b2e542
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-bnode-2.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+_:a :p1 _:a .
+<<_:a :p1 _:a >> :q <<_:a :p2 :o>> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-1.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-1.nt
new file mode 100644
index 0000000..31eba74
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-1.nt
@@ -0,0 +1,2 @@
+<http://example/s> <http://example/p> <http://example/o> .
+<<<http://example/s> <http://example/p> <http://example/o>>> <http://example/r> <<<http://example/s1> <http://example/p1> <http://example/o1>>> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-1.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-1.ttl
new file mode 100644
index 0000000..5245264
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-1.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:s :p :o {| :r <<:s1 :p1 :o1>> |} .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-2.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-2.nt
new file mode 100644
index 0000000..d7efbdf
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-2.nt
@@ -0,0 +1,2 @@
+<<<http://example/s1> <http://example/p1> <http://example/o1>>> <http://example/p> <http://example/o> .
+<<<<<http://example/s1> <http://example/p1> <http://example/o1>>> <http://example/p> <http://example/o>>> <http://example/r> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-2.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-2.ttl
new file mode 100644
index 0000000..e4f7021
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-2.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+<<:s1 :p1 :o1>> :p :o {| :r :z |} .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-3.nt b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-3.nt
new file mode 100644
index 0000000..a655abb
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-3.nt
@@ -0,0 +1,2 @@
+<http://example/s> <http://example/p> <<<http://example/s2> <http://example/p2> <http://example/o2>>> .
+<<<http://example/s> <http://example/p> <<<http://example/s2> <http://example/p2> <http://example/o2>>>>> <http://example/r> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-3.ttl b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-3.ttl
new file mode 100644
index 0000000..f19ee11
--- /dev/null
+++ b/test/data/rdf-star/turtle/eval/turtle-star-eval-quoted-annotation-3.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:s :p <<:s2 :p2 :o2>> {| :r :z |} .
diff --git a/test/data/rdf-star/turtle/syntax/manifest.ttl b/test/data/rdf-star/turtle/syntax/manifest.ttl
new file mode 100644
index 0000000..eff4fd1
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/manifest.ttl
@@ -0,0 +1,259 @@
+## Distributed under both the "W3C Test Suite License" [1]
+## and the "W3C 3-clause BSD License".
+## [1] https://www.w3.org/Consortium/Legal/2008/04-testsuite-license
+## [2] https://www.w3.org/Consortium/Legal/2008/03-bsd-license
+
+PREFIX rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX rdfs:   <http://www.w3.org/2000/01/rdf-schema#>
+PREFIX mf:     <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#>
+PREFIX test:   <http://www.w3.org/2001/sw/DataAccess/tests/>
+PREFIX rdft:   <http://www.w3.org/ns/rdftest#>
+PREFIX trs:    <https://w3c.github.io/rdf-star/tests/turtle/syntax#>
+
+trs:manifest  rdf:type mf:Manifest ;
+    rdfs:label "Turtle-star Syntax Tests" ;
+    mf:entries
+    (
+        trs:turtle-star-1
+        trs:turtle-star-2
+
+        trs:turtle-star-inside-1
+        trs:turtle-star-inside-2
+
+        trs:turtle-star-nested-1
+        trs:turtle-star-nested-2
+
+        trs:turtle-star-compound-1
+
+        trs:turtle-star-bnode-1
+        trs:turtle-star-bnode-2
+        trs:turtle-star-bnode-3
+
+        trs:turtle-star-bad-1
+        trs:turtle-star-bad-2
+        trs:turtle-star-bad-3
+        trs:turtle-star-bad-4
+        trs:turtle-star-bad-5
+        trs:turtle-star-bad-6
+        trs:turtle-star-bad-7
+        trs:turtle-star-bad-8
+
+        trs:turtle-star-ann-1
+        trs:turtle-star-ann-2
+        
+        trs:turtle-star-bad-ann-1
+        trs:turtle-star-bad-ann-2
+
+## The same data as the N-Triples-star syntax tests,
+## except in file *.ttl and "TestTurtle"
+
+        trs:nt-ttl-star-1
+        trs:nt-ttl-star-2
+        trs:nt-ttl-star-3
+        trs:nt-ttl-star-4
+        trs:nt-ttl-star-5
+
+        trs:nt-ttl-star-bnode-1
+        trs:nt-ttl-star-bnode-2
+
+        trs:nt-ttl-star-nested-1
+        trs:nt-ttl-star-nested-2
+
+        trs:nt-ttl-star-bad-1
+        trs:nt-ttl-star-bad-2
+        trs:nt-ttl-star-bad-3
+        trs:nt-ttl-star-bad-4
+    ) .
+
+## Good Syntax
+
+trs:turtle-star-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - subject quoted triple" ;
+   mf:action    <turtle-star-syntax-basic-01.ttl> ;
+   .
+
+trs:turtle-star-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - object quoted triple" ;
+   mf:action    <turtle-star-syntax-basic-02.ttl> ;
+   .
+
+trs:turtle-star-inside-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - quoted triple inside blankNodePropertyList" ;
+   mf:action    <turtle-star-syntax-inside-01.ttl> ;
+   .
+
+trs:turtle-star-inside-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - quoted triple inside collection" ;
+   mf:action    <turtle-star-syntax-inside-02.ttl> ;
+   .
+
+trs:turtle-star-nested-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - nested quoted triple, subject position" ;
+   mf:action    <turtle-star-syntax-nested-01.ttl> ;
+   .
+
+trs:turtle-star-nested-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - nested quoted triple, object position" ;
+   mf:action     <turtle-star-syntax-nested-02.ttl> ;
+   .
+
+trs:turtle-star-compound-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - compound forms" ;
+   mf:action    <turtle-star-syntax-compound.ttl> ;
+   .
+
+trs:turtle-star-bnode-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - blank node subject" ;
+   mf:action    <turtle-star-syntax-bnode-01.ttl> ;
+   .
+
+trs:turtle-star-bnode-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - blank node object" ;
+   mf:action    <turtle-star-syntax-bnode-02.ttl> ;
+   .
+
+trs:turtle-star-bnode-3 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "Turtle-star - blank node" ;
+   mf:action    <turtle-star-syntax-bnode-03.ttl> ;
+   .
+
+## Bad Syntax
+
+trs:turtle-star-bad-1 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - quoted triple as predicate" ;
+    mf:action    <turtle-star-syntax-bad-01.ttl> ;
+    .
+
+trs:turtle-star-bad-2 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - quoted triple outside triple" ;
+    mf:action    <turtle-star-syntax-bad-02.ttl> ;
+    .
+
+trs:turtle-star-bad-3 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - collection list in quoted triple" ;
+    mf:action    <turtle-star-syntax-bad-03.ttl> ;
+    .
+
+trs:turtle-star-bad-4 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - literal in subject position of quoted triple" ;
+    mf:action    <turtle-star-syntax-bad-04.ttl> ;
+    .
+
+trs:turtle-star-bad-5 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - blank node  as predicate in quoted triple";
+    mf:action    <turtle-star-syntax-bad-05.ttl> ;
+    .
+
+trs:turtle-star-bad-6 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - compound blank node expression";
+    mf:action    <turtle-star-syntax-bad-06.ttl> ;
+    .
+
+trs:turtle-star-bad-7 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - incomplete quoted triple";
+    mf:action    <turtle-star-syntax-bad-07.ttl> ;
+    .
+
+trs:turtle-star-bad-8 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - over-long quoted triple";
+    mf:action    <turtle-star-syntax-bad-08.ttl> ;
+    .
+
+## Annotation syntax
+
+trs:turtle-star-ann-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+    mf:name      "Turtle-star - Annotation form" ;
+    mf:action    <turtle-star-annotation-1.ttl> ;
+   .
+
+trs:turtle-star-ann-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+    mf:name      "Turtle-star - Annotation example" ;
+    mf:action    <turtle-star-annotation-2.ttl> ;
+    .
+
+## Bad annotation syntax
+
+trs:turtle-star-bad-ann-1 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - empty annotation" ;
+    mf:action    <turtle-star-syntax-bad-ann-1.ttl> ;
+   .
+
+trs:turtle-star-bad-ann-2 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "Turtle-star - bad - triple as annotation" ;
+    mf:action    <turtle-star-syntax-bad-ann-2.ttl> ;
+   .
+
+## --------------------------------------------------
+## Same data as the N-triples-star tests.
+## N-Triples is a subset of Turtle, and the same is true for the "star" feature.
+
+## Good Syntax
+
+trs:nt-ttl-star-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - subject quoted triple" ;
+   mf:action    <nt-ttl-star-syntax-1.ttl> ;
+   .
+
+trs:nt-ttl-star-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - object quoted triple" ;
+   mf:action    <nt-ttl-star-syntax-2.ttl> ;
+   .
+
+trs:nt-ttl-star-3 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - subject and object quoted triples" ;
+   mf:action    <nt-ttl-star-syntax-3.ttl> ;
+   .
+
+trs:nt-ttl-star-4 rdf:type rdft:TestNTriplesPositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - whitespace and terms" ;
+   mf:action    <nt-ttl-star-syntax-4.ttl> ;
+   .
+
+trs:nt-ttl-star-5 rdf:type rdft:TestNTriplesPositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - Nested, no whitespace" ;
+   mf:action    <nt-ttl-star-syntax-5.ttl> ;
+   .
+
+# Blank nodes
+
+trs:nt-ttl-star-bnode-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - Blank node subject" ;
+   mf:action    <nt-ttl-star-bnode-1.ttl> ;
+   .
+
+trs:nt-ttl-star-bnode-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - Blank node object" ;
+   mf:action    <nt-ttl-star-bnode-2.ttl> ;
+   .
+   
+trs:nt-ttl-star-nested-1 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - Nested subject term" ;
+   mf:action    <nt-ttl-star-nested-1.ttl> ;
+   .
+
+trs:nt-ttl-star-nested-2 rdf:type rdft:TestTurtlePositiveSyntax ;
+   mf:name      "N-Triples-star as Turtle-star - Nested object term" ;
+   mf:action    <nt-ttl-star-nested-2.ttl> ;
+   .
+
+## Bad syntax
+ 
+trs:nt-ttl-star-bad-1 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "N-Triples-star as Turtle-star - Bad - quoted triple as predicate" ;
+    mf:action    <nt-ttl-star-bad-syntax-1.ttl> ;
+    .
+    
+trs:nt-ttl-star-bad-2 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "N-Triples-star as Turtle-star - Bad - quoted triple, literal subject" ;
+    mf:action    <nt-ttl-star-bad-syntax-2.ttl> ;
+    .
+
+trs:nt-ttl-star-bad-3 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "N-Triples-star as Turtle-star - Bad - quoted triple, literal predicate" ;
+    mf:action    <nt-ttl-star-bad-syntax-3.ttl> ;
+    .
+
+trs:nt-ttl-star-bad-4 rdf:type rdft:TestTurtleNegativeSyntax ;
+    mf:name      "N-Triples-star as Turtle-star - Bad - quoted triple, blank node predicate" ;
+    mf:action    <nt-ttl-star-bad-syntax-4.ttl> ;
+    .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-1.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-1.ttl
new file mode 100644
index 0000000..401f4b8
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-1.ttl
@@ -0,0 +1 @@
+<http://example/a> << <http://example/s> <http://example/p>  <http://example/o> >>  <http://example/z> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-2.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-2.ttl
new file mode 100644
index 0000000..1e47b36
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-2.ttl
@@ -0,0 +1 @@
+<< "XYZ" <http://example/p> <http://example/o> >> <http://example/q> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-3.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-3.ttl
new file mode 100644
index 0000000..eaeb6f2
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-3.ttl
@@ -0,0 +1 @@
+<< <http://example/s> "XYZ" <http://example/o> >> <http://example/q> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-4.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-4.ttl
new file mode 100644
index 0000000..af41d20
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bad-syntax-4.ttl
@@ -0,0 +1 @@
+<< <http://example/s> _:label <http://example/o> >> <http://example/q> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-bnode-1.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bnode-1.ttl
new file mode 100644
index 0000000..2d94448
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bnode-1.ttl
@@ -0,0 +1,2 @@
+_:b0 <http://example/p> <http://example/o> .
+<< _:b0 <http://example/p> <http://example/o> >> <http://example/q> "ABC" .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-bnode-2.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bnode-2.ttl
new file mode 100644
index 0000000..2dc337a
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-bnode-2.ttl
@@ -0,0 +1,2 @@
+<http://example/s> <http://example/p> _:b1 .
+<< <http://example/s> <http://example/p> _:b1 >> <http://example/q> "456"^^<http://www.w3.org/2001/XMLSchema#integer> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-nested-1.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-nested-1.ttl
new file mode 100644
index 0000000..d6a50cb
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-nested-1.ttl
@@ -0,0 +1,3 @@
+<http://example/s> <http://example/p> <http://example/o> .
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/r> <http://example/z> .
+<< << <http://example/s> <http://example/p> <http://example/o> >> <http://example/r> <http://example/z> >> <http://example/q> "1"^^<http://www.w3.org/2001/XMLSchema#integer> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-nested-2.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-nested-2.ttl
new file mode 100644
index 0000000..7a8d313
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-nested-2.ttl
@@ -0,0 +1,3 @@
+<http://example/s> <http://example/p> <http://example/o> .
+<http://example/a> <http://example/q> << <http://example/s> <http://example/p> <http://example/o> >> .
+<< <http://example/a> <http://example/q> << <http://example/s> <http://example/p> <http://example/o> >> >> <http://example/r> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-1.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-1.ttl
new file mode 100644
index 0000000..7f2be99
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-1.ttl
@@ -0,0 +1 @@
+<< <http://example/s> <http://example/p> <http://example/o> >> <http://example/q> <http://example/z> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-2.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-2.ttl
new file mode 100644
index 0000000..5aa2cb2
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-2.ttl
@@ -0,0 +1 @@
+<http://example/x> <http://example/p> << <http://example/s> <http://example/p> <http://example/o> >> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-3.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-3.ttl
new file mode 100644
index 0000000..16b9420
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-3.ttl
@@ -0,0 +1 @@
+<< <http://example/s1> <http://example/p1> <http://example/o1> >> <http://example/q> << <http://example/s2> <http://example/p2> <http://example/o2> >> .
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-4.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-4.ttl
new file mode 100644
index 0000000..6dc18c3
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-4.ttl
@@ -0,0 +1 @@
+<<<http://example/s1><http://example/p1><http://example/o1>>><http://example/q><<<http://example/s2><http://example/p2><http://example/o2>>>.
diff --git a/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-5.ttl b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-5.ttl
new file mode 100644
index 0000000..041b857
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/nt-ttl-star-syntax-5.ttl
@@ -0,0 +1 @@
+<<<<<http://example/s1><http://example/p1><http://example/o1>>><http://example/q1><<<http://example/s2><http://example/p2><http://example/o2>>>>><http://example/q2><<<<<http://example/s3><http://example/p3><http://example/o3>>><http://example/q3><<<http://example/s4><http://example/p4><http://example/o4>>>>>.
\ No newline at end of file
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-annotation-1.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-annotation-1.ttl
new file mode 100644
index 0000000..fdba9df
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-annotation-1.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:s :p :o {| :r :z |} .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-annotation-2.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-annotation-2.ttl
new file mode 100644
index 0000000..06ef8ea
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-annotation-2.ttl
@@ -0,0 +1,10 @@
+PREFIX :       <http://example/>
+PREFIX xsd:     <http://www.w3.org/2001/XMLSchema#>
+
+:s :p :o {| :source [ :graph <http://host1/> ;
+                      :date "2020-01-20"^^xsd:date
+                    ] ;
+            :source [ :graph <http://host2/> ;
+                      :date "2020-12-31"^^xsd:date
+                    ]
+          |} .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-01.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-01.ttl
new file mode 100644
index 0000000..4a41e43
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-01.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+:x <<:s :p :o>> 123 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-02.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-02.ttl
new file mode 100644
index 0000000..8a1fbb3
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-02.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+<<:s :p :o>> .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-03.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-03.ttl
new file mode 100644
index 0000000..3952b24
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-03.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p ("abc") .
+<<:s :p ("abc") >> :q 123 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-04.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-04.ttl
new file mode 100644
index 0000000..a69b646
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-04.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+<<3 :p :o >> :q :z .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-05.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-05.ttl
new file mode 100644
index 0000000..b1a4596
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-05.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+<<:s [] :o>> :q 123 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-06.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-06.ttl
new file mode 100644
index 0000000..687ef35
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-06.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+
+<<:s :p [ :p1 :o1 ]  >> :q 123 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-07.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-07.ttl
new file mode 100644
index 0000000..329e6d3
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-07.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:s :p << :p :r >> .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-08.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-08.ttl
new file mode 100644
index 0000000..72ceff2
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-08.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+:s :p << :g :s :p :o >> .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-ann-1.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-ann-1.ttl
new file mode 100644
index 0000000..7f654f4
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-ann-1.ttl
@@ -0,0 +1,6 @@
+PREFIX : <http://example.com/ns#>
+
+SELECT * {
+  :s :p :o {|  |} .
+}
+
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-ann-2.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-ann-2.ttl
new file mode 100644
index 0000000..1abed88
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bad-ann-2.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example.com/ns#>
+
+:a :b :c {| :s :p :o |} .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-basic-01.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-basic-01.ttl
new file mode 100644
index 0000000..3874f92
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-basic-01.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+<<:s :p :o>> :q 123 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-basic-02.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-basic-02.ttl
new file mode 100644
index 0000000..a2b95e7
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-basic-02.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+:x :p <<:s :p :o>> .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-01.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-01.ttl
new file mode 100644
index 0000000..6591a66
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-01.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+_:a :p :o .
+<<_:a :p :o >> :q 456 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-02.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-02.ttl
new file mode 100644
index 0000000..ac99ad7
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-02.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p _:a .
+<<:s :p _:a >> :q 456 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-03.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-03.ttl
new file mode 100644
index 0000000..95f8cf5
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-bnode-03.ttl
@@ -0,0 +1,3 @@
+PREFIX : <http://example/>
+
+<<[] :p [] >> :q :z .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-compound.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-compound.ttl
new file mode 100644
index 0000000..df83d97
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-compound.ttl
@@ -0,0 +1,11 @@
+PREFIX : <http://example/>
+
+
+:x :r :z .
+:a :b :c .
+<<:a :b :c>> :r :z .
+<<:x :r :z >> :p <<:a :b :c>> .
+
+<< <<:x :r :z >> :p <<:a :b :c>> >>
+   :q
+<< <<:x :r :z >> :p <<:a :b :c>> >> .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-inside-01.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-inside-01.ttl
new file mode 100644
index 0000000..ff87a14
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-inside-01.ttl
@@ -0,0 +1,4 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+[ :q <<:s :p :o>> ] :b :c .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-inside-02.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-inside-02.ttl
new file mode 100644
index 0000000..28e2590
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-inside-02.ttl
@@ -0,0 +1,5 @@
+PREFIX : <http://example/>
+
+:s :p :o1 .
+:s :p :o2 .
+( <<:s :p :o1>> <<:s :p :o2>> )  :q 123 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-nested-01.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-nested-01.ttl
new file mode 100644
index 0000000..93a936c
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-nested-01.ttl
@@ -0,0 +1,7 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+
+<<:s :p :o >> :r :z .
+
+<< <<:s :p :o >> :r :z >> :q 1 .
diff --git a/test/data/rdf-star/turtle/syntax/turtle-star-syntax-nested-02.ttl b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-nested-02.ttl
new file mode 100644
index 0000000..aec49ef
--- /dev/null
+++ b/test/data/rdf-star/turtle/syntax/turtle-star-syntax-nested-02.ttl
@@ -0,0 +1,5 @@
+PREFIX : <http://example/>
+
+:s :p :o .
+:a :q <<:s :p :o >> .
+<< :a :q <<:s :p :o >>>> :r :z .
diff --git a/test/unit/ntriples_star_encoder_test.exs b/test/unit/ntriples_star_encoder_test.exs
index 0599ceb..004a636 100644
--- a/test/unit/ntriples_star_encoder_test.exs
+++ b/test/unit/ntriples_star_encoder_test.exs
@@ -11,15 +11,15 @@ defmodule RDF.Star.NTriples.EncoderTest do
   end
 
   test "annotations of triples on object position" do
-        assert NTriples.Encoder.encode!(
-                 Graph.new([
-                   statement(),
-                   {EX.AS, EX.ap(), statement()},
-                 ])
-               ) ==
-                 """
-                 <http://example.com/AS> <http://example.com/ap> << <http://example.com/S> <http://example.com/P> "Foo" >> .
-                 <http://example.com/S> <http://example.com/P> "Foo" .
-                 """
+    assert NTriples.Encoder.encode!(
+             Graph.new([
+               statement(),
+               {EX.AS, EX.ap(), statement()}
+             ])
+           ) ==
+             """
+             <http://example.com/AS> <http://example.com/ap> << <http://example.com/S> <http://example.com/P> "Foo" >> .
+             <http://example.com/S> <http://example.com/P> "Foo" .
+             """
   end
 end