diff --git a/index.js b/index.js
index 521962b..f21bed5 100644
--- a/index.js
+++ b/index.js
@@ -1,8 +1,9 @@
 
 var jsonld = require("jsonld")
   , uuid   = require("uuid")
-  , IRI = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/i
+  , IRI = /^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/i
   , RDFTYPE = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"
+  , XSDTYPE = "http://www.w3.org/2001/XMLSchema#"
   , async = require("async")
   , blanksRegexp = /^_:b\d+$/
   , genActionStream;
@@ -43,6 +44,12 @@ function levelgraphJSONLD(db, jsonldOpts) {
             }
             value = blanks[value];
           }
+          // preserve object data type if other then string
+          if(key === "object" && triple.object.datatype &&  triple.object.datatype.match(XSDTYPE)){
+            if(triple.object.datatype !== "http://www.w3.org/2001/XMLSchema#string"){
+              value = '"' + triple.object.value + '"^^<' + triple.object.datatype + '>';
+            }
+          }
           acc[key] = value;
           return acc;
         }, {});
@@ -141,6 +148,29 @@ function levelgraphJSONLD(db, jsonldOpts) {
         } else if (triple.object.indexOf("_:") !== 0) {
           acc[triple.subject][triple.predicate] = {};
           key = (triple.object.match(IRI)) ? "@id" : "@value";
+          // coerce
+          var coercionCheck = triple.object.match(/"(.*)"\^\^<http:\/\/www.w3.org\/2001\/XMLSchema#(.*)>/);
+          if (coercionCheck) {
+            switch (coercionCheck[2]) {
+              case "boolean":
+                if (coercionCheck[1] === "true") {
+                  triple.object = true;
+                }
+                if (coercionCheck[1] === "false") {
+                  triple.object = false;
+                }
+                break;
+              case "integer":
+                triple.object = parseInt(coercionCheck[1], 10);
+                break;
+              case "double":
+                triple.object = parseFloat(coercionCheck[1]);
+                break;
+              case "string":
+                triple.object = coercionCheck[1];
+                break;
+            }
+          }
           acc[triple.subject][triple.predicate][key] = triple.object;
           cb(null, acc);
         } else {
diff --git a/test/datatype_spec.js b/test/datatype_spec.js
new file mode 100644
index 0000000..614878c
--- /dev/null
+++ b/test/datatype_spec.js
@@ -0,0 +1,244 @@
+// http://json-ld.org/spec/latest/json-ld-api/#data-round-tripping
+
+var level  = require("level-test")()
+  , graph  = require("levelgraph")
+  , jsonld = require("../");
+
+describe("jsonld.put data type", function() {
+
+  var db, bbb;
+
+  beforeEach(function() {
+    db = jsonld(graph(level()));
+    bbb = fixture("bigbuckbunny.json");
+  });
+
+  describe("coerce", function() {
+
+    it("preserves boolean true", function(done) {
+      bbb.isFamilyFriendly = true;
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/isFamilyFriendly"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal('"true"^^<http://www.w3.org/2001/XMLSchema#boolean>');
+          done();
+        });
+      });
+    });
+
+    it("preserves boolean false", function(done) {
+      bbb.isFamilyFriendly = false;
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/isFamilyFriendly"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal('"false"^^<http://www.w3.org/2001/XMLSchema#boolean>');
+          done();
+        });
+      });
+    });
+
+    it("preserves integer positive", function(done) {
+      bbb.version = 2;
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/version"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal('"2"^^<http://www.w3.org/2001/XMLSchema#integer>');
+          done();
+        });
+      });
+    });
+
+    it("preserves integer negative", function(done) {
+      bbb.version = -2;
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/version"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal('"-2"^^<http://www.w3.org/2001/XMLSchema#integer>');
+          done();
+        });
+      });
+    });
+
+    it("preserves integer zero", function(done) {
+      bbb.version = 0;
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/version"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal('"0"^^<http://www.w3.org/2001/XMLSchema#integer>');
+          done();
+        });
+      });
+    });
+
+    it("preserves double positive", function(done) {
+      bbb.version = 12.345;
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/version"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal('"1.2345E1"^^<http://www.w3.org/2001/XMLSchema#double>');
+          done();
+        });
+      });
+    });
+
+    it("preserves double positive", function(done) {
+      bbb.version = -12.345;
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/version"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal('"-1.2345E1"^^<http://www.w3.org/2001/XMLSchema#double>');
+          done();
+        });
+      });
+    });
+
+    it("doesn't preserve string", function(done) {
+      bbb.contentRating = "MPAA PG-13";
+      db.jsonld.put(bbb, function() {
+        db.get({
+          predicate: "http://schema.org/contentRating"
+        }, function(err, triples) {
+          expect(triples[0].object).to.equal("MPAA PG-13");
+          done();
+        });
+      });
+    });
+  });
+});
+describe("jsonld.get data type", function() {
+
+  var db, bbb, triple;
+
+  beforeEach(function() {
+    db = jsonld(graph(level()));
+    bbb = fixture("bigbuckbunny.json");
+    triple = {
+          subject: bbb["@id"],
+          predicate: null,
+          object: null
+    };
+  });
+
+  describe("coerce", function() {
+
+    it("preserves boolean true", function(done) {
+      triple.predicate = "http://schema.org/isFamilyFriendly";
+      triple.object = '"true"^^<http://www.w3.org/2001/XMLSchema#boolean>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["isFamilyFriendly"]).to.be.true;
+            done();
+          });
+        });
+      });
+    });
+
+    it("preserves boolean false", function(done) {
+      triple.predicate = "http://schema.org/isFamilyFriendly";
+      triple.object = '"false"^^<http://www.w3.org/2001/XMLSchema#boolean>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["isFamilyFriendly"]).to.be.false;
+            done();
+          });
+        });
+      });
+    });
+
+    it("preserves integer positive", function(done) {
+      triple.predicate = "http://schema.org/version";
+      triple.object = '"2"^^<http://www.w3.org/2001/XMLSchema#integer>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["version"]).to.equal(2);
+            done();
+          });
+        });
+      });
+    });
+
+    it("preserves integer positive", function(done) {
+      triple.predicate = "http://schema.org/version";
+      triple.object = '"-2"^^<http://www.w3.org/2001/XMLSchema#integer>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["version"]).to.equal(-2);
+            done();
+          });
+        });
+      });
+    });
+
+    it("preserves integer zero", function(done) {
+      triple.predicate = "http://schema.org/version";
+      triple.object = '"0"^^<http://www.w3.org/2001/XMLSchema#integer>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["version"]).to.equal(0);
+            done();
+          });
+        });
+      });
+    });
+
+    it("preserves double positive", function(done) {
+      triple.predicate = "http://schema.org/version";
+      triple.object = '"1.2345E1"^^<http://www.w3.org/2001/XMLSchema#double>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["version"]).to.equal(12.345);
+            done();
+          });
+        });
+      });
+    });
+
+    it("preserves double negative", function(done) {
+      triple.predicate = "http://schema.org/version";
+      triple.object = '"-1.2345E1"^^<http://www.w3.org/2001/XMLSchema#double>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["version"]).to.equal(-12.345);
+            done();
+          });
+        });
+      });
+    });
+
+    it("does not preserve string", function(done) {
+      triple.predicate = "http://schema.org/contentRating";
+      triple.object = '"MPAA PG-13"^^<http://www.w3.org/2001/XMLSchema#string>';
+
+      db.jsonld.put(bbb, function() {
+        db.put(triple, function() {
+          db.jsonld.get(bbb["@id"], bbb["@context"], function(err, doc) {
+            expect(doc["contentRating"]).to.equal("MPAA PG-13");
+            done();
+          });
+        });
+      });
+    });
+
+  });
+});
diff --git a/test/fixture/bigbuckbunny.json b/test/fixture/bigbuckbunny.json
new file mode 100644
index 0000000..cb6c321
--- /dev/null
+++ b/test/fixture/bigbuckbunny.json
@@ -0,0 +1,7 @@
+{
+  "@context": {
+    "@vocab": "http://schema.org/"
+  },
+  "@id": "http://www.bigbuckbunny.org/",
+  "name": "Big Buck Bunny"
+}
diff --git a/test/put_spec.js b/test/put_spec.js
index 1560677..434bdaa 100644
--- a/test/put_spec.js
+++ b/test/put_spec.js
@@ -135,7 +135,7 @@ describe("jsonld.put", function() {
         db.get({
             subject: "http://manu.sporny.org#person"
           , predicate: "http://xmlns.com/foaf/0.1/age"
-          , object: 42
+          , object: '"42"^^<http://www.w3.org/2001/XMLSchema#integer>'
         }, function(err, triples) {
           expect(triples).to.have.length(1);
           done();