Change const int to enum
diff --git a/ndn-cpp/encoding/BinaryXML.h b/ndn-cpp/encoding/BinaryXML.h
index 65b3c96..932d2c3 100644
--- a/ndn-cpp/encoding/BinaryXML.h
+++ b/ndn-cpp/encoding/BinaryXML.h
@@ -11,130 +11,132 @@
 extern "C" {
 #endif
 
-const int ndn_BinaryXML_EXT = 0x00; 	
-const int ndn_BinaryXML_TAG = 0x01; 
-const int ndn_BinaryXML_DTAG = 0x02; 
-const int ndn_BinaryXML_ATTR = 0x03; 
-const int ndn_BinaryXML_DATTR = 0x04; 
-const int ndn_BinaryXML_BLOB = 0x05; 
-const int ndn_BinaryXML_UDATA = 0x06; 
-const int ndn_BinaryXML_CLOSE = 0x0;
+enum {
+  ndn_BinaryXML_EXT = 0x00, 	
+  ndn_BinaryXML_TAG = 0x01, 
+  ndn_BinaryXML_DTAG = 0x02, 
+  ndn_BinaryXML_ATTR = 0x03, 
+  ndn_BinaryXML_DATTR = 0x04, 
+  ndn_BinaryXML_BLOB = 0x05, 
+  ndn_BinaryXML_UDATA = 0x06, 
+  ndn_BinaryXML_CLOSE = 0x0,
 
-const int ndn_BinaryXML_TT_BITS = 3;
-const int ndn_BinaryXML_TT_MASK = 0x07;
-const int ndn_BinaryXML_TT_VALUE_BITS = 4;
-const int ndn_BinaryXML_TT_VALUE_MASK = 0x0f;
-const int ndn_BinaryXML_REGULAR_VALUE_BITS = 7;
-const int ndn_BinaryXML_REGULAR_VALUE_MASK = 0x7f;
-const int ndn_BinaryXML_TT_FINAL = 0x80;
+  ndn_BinaryXML_TT_BITS = 3,
+  ndn_BinaryXML_TT_MASK = 0x07,
+  ndn_BinaryXML_TT_VALUE_BITS = 4,
+  ndn_BinaryXML_TT_VALUE_MASK = 0x0f,
+  ndn_BinaryXML_REGULAR_VALUE_BITS = 7,
+  ndn_BinaryXML_REGULAR_VALUE_MASK = 0x7f,
+  ndn_BinaryXML_TT_FINAL = 0x80,
 
-const int ndn_BinaryXML_DTag_Any = 13;
-const int ndn_BinaryXML_DTag_Name = 14;
-const int ndn_BinaryXML_DTag_Component = 15;
-const int ndn_BinaryXML_DTag_Certificate = 16;
-const int ndn_BinaryXML_DTag_Collection = 17;
-const int ndn_BinaryXML_DTag_CompleteName = 18;
-const int ndn_BinaryXML_DTag_Content = 19;
-const int ndn_BinaryXML_DTag_SignedInfo = 20;
-const int ndn_BinaryXML_DTag_ContentDigest = 21;
-const int ndn_BinaryXML_DTag_ContentHash = 22;
-const int ndn_BinaryXML_DTag_Count = 24;
-const int ndn_BinaryXML_DTag_Header = 25;
-const int ndn_BinaryXML_DTag_Interest = 26;	/* 20090915 */
-const int ndn_BinaryXML_DTag_Key = 27;
-const int ndn_BinaryXML_DTag_KeyLocator = 28;
-const int ndn_BinaryXML_DTag_KeyName = 29;
-const int ndn_BinaryXML_DTag_Length = 30;
-const int ndn_BinaryXML_DTag_Link = 31;
-const int ndn_BinaryXML_DTag_LinkAuthenticator = 32;
-const int ndn_BinaryXML_DTag_NameComponentCount = 33;	/* DeprecatedInInterest */
-const int ndn_BinaryXML_DTag_RootDigest = 36;
-const int ndn_BinaryXML_DTag_Signature = 37;
-const int ndn_BinaryXML_DTag_Start = 38;
-const int ndn_BinaryXML_DTag_Timestamp = 39;
-const int ndn_BinaryXML_DTag_Type = 40;
-const int ndn_BinaryXML_DTag_Nonce = 41;
-const int ndn_BinaryXML_DTag_Scope = 42;
-const int ndn_BinaryXML_DTag_Exclude = 43;
-const int ndn_BinaryXML_DTag_Bloom = 44;
-const int ndn_BinaryXML_DTag_BloomSeed = 45;
-const int ndn_BinaryXML_DTag_AnswerOriginKind = 47;
-const int ndn_BinaryXML_DTag_InterestLifetime = 48;
-const int ndn_BinaryXML_DTag_Witness = 53;
-const int ndn_BinaryXML_DTag_SignatureBits = 54;
-const int ndn_BinaryXML_DTag_DigestAlgorithm = 55;
-const int ndn_BinaryXML_DTag_BlockSize = 56;
-const int ndn_BinaryXML_DTag_FreshnessSeconds = 58;
-const int ndn_BinaryXML_DTag_FinalBlockID = 59;
-const int ndn_BinaryXML_DTag_PublisherPublicKeyDigest = 60;
-const int ndn_BinaryXML_DTag_PublisherCertificateDigest = 61;
-const int ndn_BinaryXML_DTag_PublisherIssuerKeyDigest = 62;
-const int ndn_BinaryXML_DTag_PublisherIssuerCertificateDigest = 63;
-const int ndn_BinaryXML_DTag_ContentObject = 64;	/* 20090915 */
-const int ndn_BinaryXML_DTag_WrappedKey = 65;
-const int ndn_BinaryXML_DTag_WrappingKeyIdentifier = 66;
-const int ndn_BinaryXML_DTag_WrapAlgorithm = 67;
-const int ndn_BinaryXML_DTag_KeyAlgorithm = 68;
-const int ndn_BinaryXML_DTag_Label = 69;
-const int ndn_BinaryXML_DTag_EncryptedKey = 70;
-const int ndn_BinaryXML_DTag_EncryptedNonceKey = 71;
-const int ndn_BinaryXML_DTag_WrappingKeyName = 72;
-const int ndn_BinaryXML_DTag_Action = 73;
-const int ndn_BinaryXML_DTag_FaceID = 74;
-const int ndn_BinaryXML_DTag_IPProto = 75;
-const int ndn_BinaryXML_DTag_Host = 76;
-const int ndn_BinaryXML_DTag_Port = 77;
-const int ndn_BinaryXML_DTag_MulticastInterface = 78;
-const int ndn_BinaryXML_DTag_ForwardingFlags = 79;
-const int ndn_BinaryXML_DTag_FaceInstance = 80;
-const int ndn_BinaryXML_DTag_ForwardingEntry = 81;
-const int ndn_BinaryXML_DTag_MulticastTTL = 82;
-const int ndn_BinaryXML_DTag_MinSuffixComponents = 83;
-const int ndn_BinaryXML_DTag_MaxSuffixComponents = 84;
-const int ndn_BinaryXML_DTag_ChildSelector = 85;
-const int ndn_BinaryXML_DTag_RepositoryInfo = 86;
-const int ndn_BinaryXML_DTag_Version = 87;
-const int ndn_BinaryXML_DTag_RepositoryVersion = 88;
-const int ndn_BinaryXML_DTag_GlobalPrefix = 89;
-const int ndn_BinaryXML_DTag_LocalName = 90;
-const int ndn_BinaryXML_DTag_Policy = 91;
-const int ndn_BinaryXML_DTag_Namespace = 92;
-const int ndn_BinaryXML_DTag_GlobalPrefixName = 93;
-const int ndn_BinaryXML_DTag_PolicyVersion = 94;
-const int ndn_BinaryXML_DTag_KeyValueSet = 95;
-const int ndn_BinaryXML_DTag_KeyValuePair = 96;
-const int ndn_BinaryXML_DTag_IntegerValue = 97;
-const int ndn_BinaryXML_DTag_DecimalValue = 98;
-const int ndn_BinaryXML_DTag_StringValue = 99;
-const int ndn_BinaryXML_DTag_BinaryValue = 100;
-const int ndn_BinaryXML_DTag_NameValue = 101;
-const int ndn_BinaryXML_DTag_Entry = 102;
-const int ndn_BinaryXML_DTag_ACL = 103;
-const int ndn_BinaryXML_DTag_ParameterizedName = 104;
-const int ndn_BinaryXML_DTag_Prefix = 105;
-const int ndn_BinaryXML_DTag_Suffix = 106;
-const int ndn_BinaryXML_DTag_Root = 107;
-const int ndn_BinaryXML_DTag_ProfileName = 108;
-const int ndn_BinaryXML_DTag_Parameters = 109;
-const int ndn_BinaryXML_DTag_InfoString = 110;
-const int ndn_BinaryXML_DTag_StatusResponse = 112;
-const int ndn_BinaryXML_DTag_StatusCode = 113;
-const int ndn_BinaryXML_DTag_StatusText = 114;
-const int ndn_BinaryXML_DTag_SyncNode = 115;
-const int ndn_BinaryXML_DTag_SyncNodeKind = 116;
-const int ndn_BinaryXML_DTag_SyncNodeElement = 117;
-const int ndn_BinaryXML_DTag_SyncVersion = 118;
-const int ndn_BinaryXML_DTag_SyncNodeElements = 119;
-const int ndn_BinaryXML_DTag_SyncContentHash = 120;
-const int ndn_BinaryXML_DTag_SyncLeafCount = 121;
-const int ndn_BinaryXML_DTag_SyncTreeDepth = 122;
-const int ndn_BinaryXML_DTag_SyncByteCount = 123;
-const int ndn_BinaryXML_DTag_SyncConfigSlice = 124;
-const int ndn_BinaryXML_DTag_SyncConfigSliceList = 125;
-const int ndn_BinaryXML_DTag_SyncConfigSliceOp = 126;
-const int ndn_BinaryXML_DTag_SyncNodeDeltas = 127;
-const int ndn_BinaryXML_DTag_SequenceNumber = 256;
-const int ndn_BinaryXML_DTag_CCNProtocolDataUnit = 17702112;
+  ndn_BinaryXML_DTag_Any = 13,
+  ndn_BinaryXML_DTag_Name = 14,
+  ndn_BinaryXML_DTag_Component = 15,
+  ndn_BinaryXML_DTag_Certificate = 16,
+  ndn_BinaryXML_DTag_Collection = 17,
+  ndn_BinaryXML_DTag_CompleteName = 18,
+  ndn_BinaryXML_DTag_Content = 19,
+  ndn_BinaryXML_DTag_SignedInfo = 20,
+  ndn_BinaryXML_DTag_ContentDigest = 21,
+  ndn_BinaryXML_DTag_ContentHash = 22,
+  ndn_BinaryXML_DTag_Count = 24,
+  ndn_BinaryXML_DTag_Header = 25,
+  ndn_BinaryXML_DTag_Interest = 26,	/* 20090915 */
+  ndn_BinaryXML_DTag_Key = 27,
+  ndn_BinaryXML_DTag_KeyLocator = 28,
+  ndn_BinaryXML_DTag_KeyName = 29,
+  ndn_BinaryXML_DTag_Length = 30,
+  ndn_BinaryXML_DTag_Link = 31,
+  ndn_BinaryXML_DTag_LinkAuthenticator = 32,
+  ndn_BinaryXML_DTag_NameComponentCount = 33,	/* DeprecatedInInterest */
+  ndn_BinaryXML_DTag_RootDigest = 36,
+  ndn_BinaryXML_DTag_Signature = 37,
+  ndn_BinaryXML_DTag_Start = 38,
+  ndn_BinaryXML_DTag_Timestamp = 39,
+  ndn_BinaryXML_DTag_Type = 40,
+  ndn_BinaryXML_DTag_Nonce = 41,
+  ndn_BinaryXML_DTag_Scope = 42,
+  ndn_BinaryXML_DTag_Exclude = 43,
+  ndn_BinaryXML_DTag_Bloom = 44,
+  ndn_BinaryXML_DTag_BloomSeed = 45,
+  ndn_BinaryXML_DTag_AnswerOriginKind = 47,
+  ndn_BinaryXML_DTag_InterestLifetime = 48,
+  ndn_BinaryXML_DTag_Witness = 53,
+  ndn_BinaryXML_DTag_SignatureBits = 54,
+  ndn_BinaryXML_DTag_DigestAlgorithm = 55,
+  ndn_BinaryXML_DTag_BlockSize = 56,
+  ndn_BinaryXML_DTag_FreshnessSeconds = 58,
+  ndn_BinaryXML_DTag_FinalBlockID = 59,
+  ndn_BinaryXML_DTag_PublisherPublicKeyDigest = 60,
+  ndn_BinaryXML_DTag_PublisherCertificateDigest = 61,
+  ndn_BinaryXML_DTag_PublisherIssuerKeyDigest = 62,
+  ndn_BinaryXML_DTag_PublisherIssuerCertificateDigest = 63,
+  ndn_BinaryXML_DTag_ContentObject = 64,	/* 20090915 */
+  ndn_BinaryXML_DTag_WrappedKey = 65,
+  ndn_BinaryXML_DTag_WrappingKeyIdentifier = 66,
+  ndn_BinaryXML_DTag_WrapAlgorithm = 67,
+  ndn_BinaryXML_DTag_KeyAlgorithm = 68,
+  ndn_BinaryXML_DTag_Label = 69,
+  ndn_BinaryXML_DTag_EncryptedKey = 70,
+  ndn_BinaryXML_DTag_EncryptedNonceKey = 71,
+  ndn_BinaryXML_DTag_WrappingKeyName = 72,
+  ndn_BinaryXML_DTag_Action = 73,
+  ndn_BinaryXML_DTag_FaceID = 74,
+  ndn_BinaryXML_DTag_IPProto = 75,
+  ndn_BinaryXML_DTag_Host = 76,
+  ndn_BinaryXML_DTag_Port = 77,
+  ndn_BinaryXML_DTag_MulticastInterface = 78,
+  ndn_BinaryXML_DTag_ForwardingFlags = 79,
+  ndn_BinaryXML_DTag_FaceInstance = 80,
+  ndn_BinaryXML_DTag_ForwardingEntry = 81,
+  ndn_BinaryXML_DTag_MulticastTTL = 82,
+  ndn_BinaryXML_DTag_MinSuffixComponents = 83,
+  ndn_BinaryXML_DTag_MaxSuffixComponents = 84,
+  ndn_BinaryXML_DTag_ChildSelector = 85,
+  ndn_BinaryXML_DTag_RepositoryInfo = 86,
+  ndn_BinaryXML_DTag_Version = 87,
+  ndn_BinaryXML_DTag_RepositoryVersion = 88,
+  ndn_BinaryXML_DTag_GlobalPrefix = 89,
+  ndn_BinaryXML_DTag_LocalName = 90,
+  ndn_BinaryXML_DTag_Policy = 91,
+  ndn_BinaryXML_DTag_Namespace = 92,
+  ndn_BinaryXML_DTag_GlobalPrefixName = 93,
+  ndn_BinaryXML_DTag_PolicyVersion = 94,
+  ndn_BinaryXML_DTag_KeyValueSet = 95,
+  ndn_BinaryXML_DTag_KeyValuePair = 96,
+  ndn_BinaryXML_DTag_IntegerValue = 97,
+  ndn_BinaryXML_DTag_DecimalValue = 98,
+  ndn_BinaryXML_DTag_StringValue = 99,
+  ndn_BinaryXML_DTag_BinaryValue = 100,
+  ndn_BinaryXML_DTag_NameValue = 101,
+  ndn_BinaryXML_DTag_Entry = 102,
+  ndn_BinaryXML_DTag_ACL = 103,
+  ndn_BinaryXML_DTag_ParameterizedName = 104,
+  ndn_BinaryXML_DTag_Prefix = 105,
+  ndn_BinaryXML_DTag_Suffix = 106,
+  ndn_BinaryXML_DTag_Root = 107,
+  ndn_BinaryXML_DTag_ProfileName = 108,
+  ndn_BinaryXML_DTag_Parameters = 109,
+  ndn_BinaryXML_DTag_InfoString = 110,
+  ndn_BinaryXML_DTag_StatusResponse = 112,
+  ndn_BinaryXML_DTag_StatusCode = 113,
+  ndn_BinaryXML_DTag_StatusText = 114,
+  ndn_BinaryXML_DTag_SyncNode = 115,
+  ndn_BinaryXML_DTag_SyncNodeKind = 116,
+  ndn_BinaryXML_DTag_SyncNodeElement = 117,
+  ndn_BinaryXML_DTag_SyncVersion = 118,
+  ndn_BinaryXML_DTag_SyncNodeElements = 119,
+  ndn_BinaryXML_DTag_SyncContentHash = 120,
+  ndn_BinaryXML_DTag_SyncLeafCount = 121,
+  ndn_BinaryXML_DTag_SyncTreeDepth = 122,
+  ndn_BinaryXML_DTag_SyncByteCount = 123,
+  ndn_BinaryXML_DTag_SyncConfigSlice = 124,
+  ndn_BinaryXML_DTag_SyncConfigSliceList = 125,
+  ndn_BinaryXML_DTag_SyncConfigSliceOp = 126,
+  ndn_BinaryXML_DTag_SyncNodeDeltas = 127,
+  ndn_BinaryXML_DTag_SequenceNumber = 256,
+  ndn_BinaryXML_DTag_CCNProtocolDataUnit = 17702112
+};
 
 #ifdef	__cplusplus
 }