diff --git a/src/caffe2.js b/src/caffe2.js
index 309460d079..355856388d 100644
--- a/src/caffe2.js
+++ b/src/caffe2.js
@@ -197,6 +197,10 @@ caffe2.Graph = class {
     get operators() {
         return this._operators;
     }
+
+    toString() {
+        return 'graph(' + this.name + ')';
+    }
 };
 
 caffe2.Argument = class {
@@ -327,10 +331,12 @@ caffe2.Attribute = class {
             this._value = arg.ints;
         }
         else if (arg.nets && arg.nets.length > 0) {
-            this._value = () => '{ NefDef[] }';
+            this._value = arg.nets.map((net) => new caffe2.Graph(net, null));
+            this._type = 'graph[]';
         }
         else if (arg.n) {
-            this._value = () => '{ NefDef }';
+            this._value = new caffe2.Graph(arg.n, null);
+            this._type = 'graph';
         }
         else if (arg.i != 0) {
             this._value = arg.i;
diff --git a/src/onnx.js b/src/onnx.js
index 7e95bcfa12..cbc03759eb 100644
--- a/src/onnx.js
+++ b/src/onnx.js
@@ -328,6 +328,10 @@ onnx.Graph = class {
         return this._metadata;
     }
 
+    toString() {
+        return 'graph(' + this.name + ')';
+    }
+
     _connection(connections, id, type, doc_string, initializer) {
         var connection = connections[id];
         if (!connection) {
@@ -518,6 +522,9 @@ onnx.Attribute = class {
 
     constructor(metadata, operator, attribute) {
         this._name = attribute.name;
+        this._type = null;
+        this._value = null;
+
         if (attribute.doc_string) {
             this._description = this._attribute.doc_string;
         }
@@ -525,7 +532,6 @@ onnx.Attribute = class {
             this._tensor = true;
         }
 
-        this._value = null;
         if (attribute.ints && attribute.ints.length > 0) {
             if (attribute.ints.length > 65536) {
                 this._value = () => '...';
@@ -557,6 +563,10 @@ onnx.Attribute = class {
                 });
             }
         }
+        else if (attribute.graphs && attribute.graphs.length > 0) {
+            this._value = arg.graphs.map((graph) => new onnx.Graph(metadata, graph));
+            this._type = 'graph[]';
+        }
         else if (attribute.s && attribute.s.length > 0) {
             if (attribute.s.filter(c => c <= 32 && c >= 128).length == 0) {
                 this._value = String.fromCharCode.apply(null, attribute.s);
@@ -574,33 +584,36 @@ onnx.Attribute = class {
         else if (attribute.hasOwnProperty('t')) {
             this._value = new onnx.Tensor(attribute.t).value;
         }
+        else if (attribute.hasOwnProperty('g')) {
+            this._type = 'graph';
+            this._value = new onnx.Graph(metadata, attribute.g);
+        }
 
         var attributeSchema = metadata.getAttributeSchema(operator, attribute.name);
 
-        if (attribute.hasOwnProperty('type')) {
-            if (!onnx.Attribute._attributeTypeMap) {
-                var map = {};
-                map[onnx.proto.AttributeProto.AttributeType.UNDEFINED] = 'undefined';
-                map[onnx.proto.AttributeProto.AttributeType.FLOAT] = 'float';
-                map[onnx.proto.AttributeProto.AttributeType.INT] = 'int';
-                map[onnx.proto.AttributeProto.AttributeType.STRING] = 'string';
-                map[onnx.proto.AttributeProto.AttributeType.TENSOR] = 'tensor';
-                map[onnx.proto.AttributeProto.AttributeType.GRAPH] = 'graph';
-                map[onnx.proto.AttributeProto.AttributeType.FLOATS] = 'float';
-                map[onnx.proto.AttributeProto.AttributeType.INTS] = 'int[]';
-                map[onnx.proto.AttributeProto.AttributeType.STRINGS] = 'string[]';
-                map[onnx.proto.AttributeProto.AttributeType.TENSORS] = 'tensor[]';
-                map[onnx.proto.AttributeProto.AttributeType.GRAPHS] = 'graph[]';
-                onnx.Attribute._attributeTypeMap = map;
+        if (!this._type) {
+            if (attribute.hasOwnProperty('type')) {
+                if (!onnx.Attribute._attributeTypeMap) {
+                    var map = {};
+                    map[onnx.proto.AttributeProto.AttributeType.UNDEFINED] = 'undefined';
+                    map[onnx.proto.AttributeProto.AttributeType.FLOAT] = 'float';
+                    map[onnx.proto.AttributeProto.AttributeType.INT] = 'int';
+                    map[onnx.proto.AttributeProto.AttributeType.STRING] = 'string';
+                    map[onnx.proto.AttributeProto.AttributeType.TENSOR] = 'tensor';
+                    map[onnx.proto.AttributeProto.AttributeType.GRAPH] = 'graph';
+                    map[onnx.proto.AttributeProto.AttributeType.FLOATS] = 'float';
+                    map[onnx.proto.AttributeProto.AttributeType.INTS] = 'int[]';
+                    map[onnx.proto.AttributeProto.AttributeType.STRINGS] = 'string[]';
+                    map[onnx.proto.AttributeProto.AttributeType.TENSORS] = 'tensor[]';
+                    map[onnx.proto.AttributeProto.AttributeType.GRAPHS] = 'graph[]';
+                    onnx.Attribute._attributeTypeMap = map;
+                }
+                var attributeType = onnx.Attribute._attributeTypeMap[attribute.type];
+                this._type = attributeType || onnx.Attribute._attributeTypeMap[onnx.proto.AttributeProto.AttributeType.UNDEFINED];
+            }
+            else if (attributeSchema && attributeSchema.type) {
+                this._type = attributeSchema.type;
             }
-            var attributeType = onnx.Attribute._attributeTypeMap[attribute.type];
-            this._type = attributeType || onnx.Attribute._attributeTypeMap[onnx.proto.AttributeProto.AttributeType.UNDEFINED];
-        }
-        else if (attributeSchema && attributeSchema.type) {
-            this._type = attributeSchema.type;
-        }
-        else {
-            this._type = null;
         }
 
         if (attributeSchema && attributeSchema.hasOwnProperty('default') && attributeSchema.default) {
diff --git a/src/view-sidebar.js b/src/view-sidebar.js
index 4316a14bcb..ecc193e2f0 100644
--- a/src/view-sidebar.js
+++ b/src/view-sidebar.js
@@ -296,6 +296,7 @@ class NodeAttributeView {
         if (value && value.length > 1000) {
             value = value.substring(0, 1000) + '...';
         }
+        value = value.split('<').join('&lt;').split('>').join('&gt;');
         var valueLine = document.createElement('div');
         valueLine.className = 'sidebar-view-item-value-line';
         valueLine.innerHTML = (value ? value : '&nbsp;');
diff --git a/src/view.js b/src/view.js
index 8a02b3d891..032d4f212c 100644
--- a/src/view.js
+++ b/src/view.js
@@ -857,6 +857,12 @@ view.View = class {
         if (type == 'shape[]') {
             return value.map((item) => item.toString()).join(', ');
         }
+        if (type == 'graph') {
+            return value.toString();
+        }
+        if (type == 'graph[]') {
+            return value.map((item) => item.toString()).join(', ');
+        }
         if (Array.isArray(value)) {
             return value.map((item) => {
                 if (item && item.__isLong__) {