1 files changed, 8 insertions, 1 deletions
diff --git a/src/include/novel_types.h b/src/include/novel_types.h
index 82a9947..9f1a9fa 100644
--- a/src/include/novel_types.h
+++ b/src/include/novel_types.h
@@ -82,7 +82,7 @@ enum RemoveIndexResult{
 };
 
 /* For Phrase Index */
-enum PhraseIndexError{
+enum PhraseIndexResult{
     ERROR_OK = 0,                /* operate ok */
     ERROR_NO_SUB_PHRASE_INDEX,   /* sub phrase index is not loaded */
     ERROR_NO_ITEM,               /* item has a null slot */
@@ -91,6 +91,13 @@ enum PhraseIndexError{
     ERROR_INTEGER_OVERFLOW       /* integer is overflowed */
 };
 
+/* For N-gram */
+enum ATTACH_FLAG{
+    ATTACH_READONLY = 1,
+    ATTACH_READWRITE = 0x1 << 1,
+    ATTACH_CREATE = 0x1 << 2,
+};
+
 /*
  *  n-gram Definition
  *  no B parameter(there are duplicated items in uni-gram and bi-gram)