diff --git a/src/main/antlr/Turtle.g4 b/src/main/antlr/Turtle.g4
index ec73f7ca3..0741d90f0 100644
--- a/src/main/antlr/Turtle.g4
+++ b/src/main/antlr/Turtle.g4
@@ -180,23 +180,50 @@ EXPONENT
     : ('e' | 'E') ('+' | '-' )? ('0' .. '9')+
     ;
 
-// "'''" (("'" | "''")? ([^'\] | ECHAR | UCHAR))* "'''"
 STRING_LITERAL_LONG_SINGLE_QUOTE
     : '\'\'\'' (
+            ( '\'' | '\'\'' )?
+             SINGLE_QUOTE_LONG_LITERAL_CONTENT
+        )+ '\'\'\''
+    | '\'\'\'' (
+            SINGLE_QUOTE_LONG_LITERAL_CONTENT
+            ( '\'' | '\'\'' )?
+         )+ '\'\'\''
+    | '\'\'\'' (
             ( '\'' | '\'\'' )
-            | ( ~['\\] | ECHAR | UCHAR | '"')
-        )+  '\'\'\''
+            SINGLE_QUOTE_LONG_LITERAL_CONTENT+
+            ( '\'' | '\'\'' )
+         )+ '\'\'\''
     | '\'\'\'\'\'\''
+    | '\'\'\'\'\'\'\''
+    | '\'\'\'\'\'\'\'\''
     ;
 
 STRING_LITERAL_LONG_QUOTE
     : '"""' (
+            ( '"' | '""' )?
+             QUOTE_LONG_LITERAL_CONTENT
+        )+ '"""'
+    | '"""' (
+            QUOTE_LONG_LITERAL_CONTENT
+            ( '"' | '""' )?
+         )+ '"""'
+    | '"""' (
+            ( '"' | '""' )
+            QUOTE_LONG_LITERAL_CONTENT+
             ( '"' | '""' )
-            | ( ~["\\] | ECHAR | UCHAR | '\'')
-        )+  '"""'
+         )+ '"""'
     | '""""""'
+    | '"""""""'
+    | '""""""""'
     ;
 
+QUOTE_LONG_LITERAL_CONTENT
+    : ( ~["\\] | ECHAR | UCHAR ) ;
+
+SINGLE_QUOTE_LONG_LITERAL_CONTENT
+    : ( ~['\\] | ECHAR | UCHAR ) ;
+
 STRING_LITERAL_QUOTE
     : '"'  (~["\\\r\n] | ECHAR | UCHAR)* '"'
     ;
diff --git a/src/test/java/fr/inria/corese/core/next/impl/io/parser/turtle/TurtleParserTest.java b/src/test/java/fr/inria/corese/core/next/impl/io/parser/turtle/TurtleParserTest.java
index 1931c8570..bac9a85c4 100644
--- a/src/test/java/fr/inria/corese/core/next/impl/io/parser/turtle/TurtleParserTest.java
+++ b/src/test/java/fr/inria/corese/core/next/impl/io/parser/turtle/TurtleParserTest.java
@@ -1,6 +1,7 @@
 package fr.inria.corese.core.next.impl.io.parser.turtle;
 
 import fr.inria.corese.core.next.api.Model;
+import fr.inria.corese.core.next.api.Statement;
 import fr.inria.corese.core.next.api.ValueFactory;
 import fr.inria.corese.core.next.api.io.parser.RDFParser;
 import fr.inria.corese.core.next.impl.common.vocabulary.RDFS;
@@ -8,9 +9,15 @@
 import fr.inria.corese.core.next.impl.temp.CoreseModel;
 import org.junit.jupiter.api.Test;
 
+
+
 import java.io.StringReader;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**
  * Unit tests for the ANTLRTurtle class.
@@ -20,6 +27,8 @@
  */
 public class TurtleParserTest {
 
+    private static final Logger logger = LoggerFactory.getLogger(TurtleParserTest.class);
+
     private ValueFactory factory = new CoreseAdaptedValueFactory();
 
     @Test
@@ -75,9 +84,10 @@ public void testTripleQuoteLiteralWithDoubleQuoteIncludedTextBeforeAndAfter() {
 
     @Test
     public void testTripleQuoteLiteralWithDoubleQuoteIncludedNoText() {
-        String turtle = "@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .\n" +
-                "<#0214> \n" +
-                "    rdfs:comment \"\"\"\"abc\"\"\"\" .";
+        String turtle = """
+                @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+                <#0214>\s
+                    rdfs:comment ""\""abc""\"" .""";
 
         Model model = new CoreseModel();
         RDFParser parser = new TurtleParser(model, factory, new TurtleParserOptions.Builder().baseIRI("http://inria.fr/").build());
@@ -86,4 +96,34 @@ public void testTripleQuoteLiteralWithDoubleQuoteIncludedNoText() {
         model.contains(factory.createIRI("http://inria.fr/#0214"), RDFS.comment.getIRI(), factory.createLiteral("\"abc\""));
     }
 
+    @Test
+    public void testRdfaManifest() {
+        String turtle = """
+                @base <http://rdfa.info/test-suite/test-cases/rdfa1.1/xml/manifest> .
+                @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+                @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+                
+                <#0006> rdfs:label \"""Test 0006: @rel and @rev\""";
+                  rdfs:comment \"""Tests @rev and @rel together, with the object being specified by @href, ignoring content\""";
+                  .
+                  """;
+
+        Model model = new CoreseModel();
+        RDFParser parser = new TurtleParser(model, factory, new TurtleParserOptions.Builder().baseIRI("http://inria.fr/").build());
+        parser.parse(new StringReader(turtle));
+
+        Model refModel = new CoreseModel();
+        refModel.add(factory.createIRI("http://rdfa.info/test-suite/test-cases/rdfa1.1/xml/manifest#0006"), RDFS.label.getIRI(), factory.createLiteral("Test 0006: @rel and @rev"));
+        refModel.add(factory.createIRI("http://rdfa.info/test-suite/test-cases/rdfa1.1/xml/manifest#0006"), RDFS.comment.getIRI(), factory.createLiteral("Tests @rev and @rel together, with the object being specified by @href, ignoring content"));
+
+        for(Statement stat : model) {
+            assertTrue(refModel.contains(stat));
+        }
+        for(Statement stat : refModel) {
+            assertTrue(model.contains(stat));
+        }
+
+        assertEquals(refModel.size(), model.size());
+    }
+
 }