Zy/16 rdflib read remote turtle

example/example_5.dart

@@ -0,0 +1,27 @@
+import 'dart:io';
+
+import 'package:rdflib/rdflib.dart';
+
+main() async {
+  String filePath = 'example/sample_ttl_5.ttl';
+  // Read file content to a local String
+  String fileContents = await File(filePath).readAsStringSync();
+
+  print('-------Original file-------\n$fileContents');
+
+  // create a graph to read turtle file and store info
+  Graph g = Graph();
+
+  // Parse with the new method [Graph.parseTurtle] instead of [Graph.parse] (deprecated)
+  g.parseTurtle(fileContents);
+
+  // Serialize the Graph for output
+  g.serialize(format: 'ttl', abbr: 'short');
+  print('-------Serialized String--------\n${g.serializedString}');
+
+  // Print out full format of triples (will use shorthand in serialization/export)
+  print('--------All triples in the graph-------');
+  for (Triple t in g.triples) {
+    print(t);
+  }
+}

example/example_6.dart

@@ -0,0 +1,21 @@
+import 'package:rdflib/rdflib.dart';
+
+main() async {
+  String webLink = 'https://www.w3.org/TR/turtle/examples/example3.ttl';
+
+  // Create a graph to read Turtle file and store info.
+  Graph g = Graph();
+
+  // Parse the Turtle file from the web.
+  await g.parseTurtleFromWeb(webLink);
+
+  // Serialize the Graph for output.
+  g.serialize(format: 'ttl', abbr: 'short');
+  print('-------Serialized String--------\n${g.serializedString}');
+
+  // Print out full format of triples (will use shorthand in serialization/export).
+  print('--------All triples in the graph-------');
+  for (Triple t in g.triples) {
+    print(t);
+  }
+}

example/main.dart

@@ -43,9 +43,15 @@ main() {
 
   // Print out each person's mailbox value
   print('-------\nMailboxes:');
-  for (var sub in g.subjects(a, FOAF.Person)) {
-    for (var mbox in g.objects(sub, FOAF.mbox)) {
+  for (var sub in g.subjects(pre: a, obj: FOAF.Person)) {
+    for (var mbox in g.objects(sub: sub, pre: FOAF.mbox)) {
       print('${sub}\'s mailbox: ${mbox.value}');
     }
   }
+
+  // Print out predicates of triples having donna
+  print('-------\nDonna predicates values:');
+  for (Triple tri in g.matchTriples(donna.value)) {
+    print(tri.pre.value);
+  }
 }

example/sample_ttl_5.ttl

@@ -0,0 +1,20 @@
+@prefix dc: <http://purl.org/dc/terms/>.
+@prefix ldp: <http://www.w3.org/ns/ldp#>.
+@prefix posix: <http://www.w3.org/ns/posix/stat#>.
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#>.
+
+<> <urn:npm:solid:community-server:meta:contentTypeParameter> _:b22466_b12514_b12510_n3-564;
+    a ldp:Container, ldp:BasicContainer, ldp:Resource;
+    dc:modified "2024-07-10T00:36:05.000Z"^^xsd:dateTime.
+_:b22466_b12514_b12510_n3-564 <http://www.w3.org/2000/01/rdf-schema#label> "charset";
+    <urn:npm:solid:community-server:meta:value> "utf-8".
+<ind-keys.ttl> a ldp:Resource, <http://www.w3.org/ns/iana/media-types/text/turtle#Resource>;
+    dc:modified "2024-07-10T04:54:04.000Z"^^xsd:dateTime.
+<enc-keys.ttl> a ldp:Resource, <http://www.w3.org/ns/iana/media-types/text/turtle#Resource>;
+    dc:modified "2024-06-27T12:01:32.000Z"^^xsd:dateTime.
+<> posix:mtime 1720571765;
+    ldp:contains <ind-keys.ttl>, <enc-keys.ttl>.
+<ind-keys.ttl> posix:mtime 1720587244;
+    posix:size 941.
+<enc-keys.ttl> posix:mtime 1719489692;
+    posix:size 2703.