Support both matrix and da in the command
diff --git a/datok.go b/datok.go
index 7812981..fa6e44d 100644
--- a/datok.go
+++ b/datok.go
@@ -239,6 +239,11 @@
 	return 0
 }
 
+// Type of tokenizer
+func (DaTokenizer) Type() string {
+	return DAMAGIC
+}
+
 // Resize double array when necessary
 func (dat *DaTokenizer) resize(l int) {
 	// TODO: