diff --git a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
index 69beb84c..541ffa2a 100644
--- a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
+++ b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
@@ -908,6 +908,12 @@ namespace IEC61850
 
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
             static extern int DataAttribute_getFC(IntPtr self);
+			
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern int DataAttribute_getSize(IntPtr self);
+
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern int DataAttribute_getIndex(IntPtr self);
 
             internal DataAttribute(IntPtr self, ModelNode parent) : base(self)
             {
@@ -991,6 +997,28 @@ namespace IEC61850
             public void SetValue(MmsValue value)
             {
                 DataAttribute_setValue(self, value.valueReference);
+            }
+			
+			/// <summary>
+            /// The size of the data attribute
+            /// </summary>
+            public int Size
+            {
+                get
+                {
+                    return DataAttribute_getSize(self);
+                }
+            }
+
+            /// <summary>
+            /// The index of the data attribute
+            /// </summary>
+            public int Index
+            {
+                get
+                {
+                    return DataAttribute_getIndex(self);
+                }
             }
         }
 
diff --git a/src/iec61850/inc/iec61850_dynamic_model.h b/src/iec61850/inc/iec61850_dynamic_model.h
index 59829e64..19cb4215 100644
--- a/src/iec61850/inc/iec61850_dynamic_model.h
+++ b/src/iec61850/inc/iec61850_dynamic_model.h
@@ -157,6 +157,26 @@ DataAttribute_getType(DataAttribute* self);
 LIB61850_API FunctionalConstraint
 DataAttribute_getFC(DataAttribute* self);
 
+/**
+ * \brief Get the size of the data attribute
+ *
+ * \param self the data attribute instance
+ *
+ * \return the size of the data attribute
+ */
+LIB61850_API int
+DataAttribute_getSize(DataAttribute* self);
+
+/**
+ * \brief Get the index of the data attribute
+ *
+ * \param self the data attribute instance
+ *
+ * \return the index of the data attribute
+ */
+LIB61850_API int
+DataAttribute_getIndex(DataAttribute* self);
+
 /**
  * \brief Get the trigger options of the data attribute
  *
diff --git a/src/iec61850/inc/iec61850_model.h b/src/iec61850/inc/iec61850_model.h
index 6681f5d5..a53c8c29 100644
--- a/src/iec61850/inc/iec61850_model.h
+++ b/src/iec61850/inc/iec61850_model.h
@@ -223,6 +223,7 @@ struct sDataAttribute {
     ModelNode* firstChild;
 
     int elementCount; /* > 0 if this is an array */
+    int index;
 
     FunctionalConstraint fc;
     DataAttributeType type;
diff --git a/src/iec61850/server/model/dynamic_model.c b/src/iec61850/server/model/dynamic_model.c
index 0e4e13d3..f3ee253e 100644
--- a/src/iec61850/server/model/dynamic_model.c
+++ b/src/iec61850/server/model/dynamic_model.c
@@ -543,12 +543,17 @@ DataObject_getLastChild(DataObject* self)
 static void
 DataObject_addChild(DataObject* self, ModelNode* child)
 {
-    if (self->firstChild == NULL)
+    if (self->firstChild == NULL) {
         self->firstChild = child;
+
+        ((DataAttribute*)child)->index = 0;
+    }
     else {
         ModelNode* lastChild = DataObject_getLastChild(self);
 
         lastChild->sibling = child;
+
+        ((DataAttribute*)child)->index = ((DataAttribute*)lastChild)->index + 1;
     }
 }
 
@@ -590,12 +595,17 @@ DataAttribute_getLastChild(DataAttribute* self)
 static void
 DataAttribute_addChild(DataAttribute* self, ModelNode* child)
 {
-    if (self->firstChild == NULL)
+    if (self->firstChild == NULL) {
         self->firstChild = child;
+
+        ((DataAttribute*)child)->index = 0;
+    }
     else {
         ModelNode* lastChild = DataAttribute_getLastChild(self);
 
         lastChild->sibling = child;
+
+        ((DataAttribute*)child)->index = ((DataAttribute*)lastChild)->index + 1;
     }
 }
 
@@ -616,6 +626,7 @@ DataAttribute_create(const char* name, ModelNode* parent, DataAttributeType type
     self->sibling = NULL;
     self->triggerOptions = triggerOptions;
     self->sAddr = sAddr;
+    self->index = -1;
 
     if (parent->modelType == DataObjectModelType)
         DataObject_addChild((DataObject*) parent, (ModelNode*) self);
@@ -637,6 +648,18 @@ DataAttribute_getFC(DataAttribute* self)
     return self->fc;
 }
 
+int
+DataAttribute_getSize(DataAttribute* self)
+{
+    return self->elementCount;
+}
+
+int
+DataAttribute_getIndex(DataAttribute* self)
+{
+    return self->index;
+}
+
 uint8_t
 DataAttribute_getTrgOps(DataAttribute* self)
 {
diff --git a/src/iec61850/server/model/model.c b/src/iec61850/server/model/model.c
index 3da07561..ea7610b0 100644
--- a/src/iec61850/server/model/model.c
+++ b/src/iec61850/server/model/model.c
@@ -607,6 +607,11 @@ ModelNode_getChild(ModelNode* self, const char* name)
    /* check for separator */
    const char* separator = strchr(name, '.');
 
+   /* skip array node */
+   if (name[0] == '[') {
+       return ModelNode_getChild(self, separator + 1);
+   }
+
    int nameElementLength = 0;
 
    if (separator != NULL)
diff --git a/src/mms/iso_mms/common/mms_type_spec.c b/src/mms/iso_mms/common/mms_type_spec.c
index a59c1e02..8c6df233 100644
--- a/src/mms/iso_mms/common/mms_type_spec.c
+++ b/src/mms/iso_mms/common/mms_type_spec.c
@@ -102,10 +102,21 @@ MmsVariableSpecification_getType(MmsVariableSpecification* self)
     return self->type;
 }
 
+static bool
+equalType(const MmsVariableSpecification* self, const MmsValue* otherValue)
+{
+    if (self->type == otherValue->type ||
+        (self->type == MMS_STRUCTURE && otherValue->type == MMS_ARRAY) ||
+        (self->type == MMS_ARRAY && otherValue->type == MMS_STRUCTURE))
+        return true;
+
+    return false;
+}
+
 bool
 MmsVariableSpecification_isValueOfType(MmsVariableSpecification* self, const MmsValue* value)
 {
-    if ((self->type) == (value->type)) {
+    if (equalType(self, value)) {
 
         if ((self->type == MMS_STRUCTURE) || (self->type == MMS_ARRAY)) {
 
@@ -132,6 +143,7 @@ MmsVariableSpecification_isValueOfType(MmsVariableSpecification* self, const Mms
                     if (MmsVariableSpecification_isValueOfType(self->typeSpec.array.elementTypeSpec, MmsValue_getElement(value, i)) == false)
                         return false;
                 }
+                return true;
             }
         }
         else if (self->type == MMS_BIT_STRING) {
diff --git a/src/mms/iso_mms/common/mms_value.c b/src/mms/iso_mms/common/mms_value.c
index 3fc5eda2..561a933b 100644
--- a/src/mms/iso_mms/common/mms_value.c
+++ b/src/mms/iso_mms/common/mms_value.c
@@ -98,7 +98,7 @@ MmsValue_newUnsignedFromBerInteger(Asn1PrimitiveValue* berInteger)
     return self;
 }
 
-bool
+static bool
 equalType(const MmsValue* self, const MmsValue* otherValue)
 {
     if (self->type == otherValue->type ||
diff --git a/src/mms/iso_mms/server/mms_write_service.c b/src/mms/iso_mms/server/mms_write_service.c
index 31a171e4..beff5926 100644
--- a/src/mms/iso_mms/server/mms_write_service.c
+++ b/src/mms/iso_mms/server/mms_write_service.c
@@ -615,6 +615,7 @@ mmsServer_handleWriteRequest(
                 continue;
             }
 
+#if 0
             if (alternateAccess != NULL) {
 
                if (domain == NULL)
@@ -674,6 +675,7 @@ mmsServer_handleWriteRequest(
                 goto end_of_main_loop;
 
             }
+#endif
 
             /* Check for correct type */
             if (MmsVariableSpecification_isValueOfType(variable, value) == false) {