diff --git a/sources/ActionView.cpp b/sources/ActionView.cpp
index 4a38c82..1699550 100644
--- a/sources/ActionView.cpp
+++ b/sources/ActionView.cpp
@@ -129,10 +129,10 @@ ActionView::MessageReceived(BMessage* msg)
 				const char* fileType;
 				switch (fType) {
 					case ACTION_ARCHIVE:
-						fileType = archiveMime;
+						fileType = kArchiveMime;
 						break;
 					case ACTION_COMMAND:
-						fileType = scriptMime;
+						fileType = kScriptMime;
 						break;
 					default:
 						fileType = "";
diff --git a/sources/RuleRunner.cpp b/sources/RuleRunner.cpp
index 81cf0f0..67904aa 100644
--- a/sources/RuleRunner.cpp
+++ b/sources/RuleRunner.cpp
@@ -8,24 +8,23 @@
 		Owen Pan <owen.pan@yahoo.com>, 2017
 */
 
+#include "RuleRunner.h"
+
+#include <fs_attr.h>
+
 #include <Catalog.h>
 #include <Directory.h>
-#include <Entry.h>
 #include <FindDirectory.h>
-#include <Mime.h>
+#include <MimeType.h>
 #include <Path.h>
 #include <Roster.h>
 
+#include "ConflictWindow.h"
 #include "CppSQLite3.h"
 #include "Database.h"
-#include "ConflictWindow.h"
 #include "FSUtils.h"
 #include "main.h"
 #include "PatternProcessor.h"
-#include "RuleRunner.h"
-
-#include <fs_attr.h>
-#include <stdlib.h>
 
 /*
 	FilerAction message fields:
@@ -247,9 +246,8 @@ const NamePair sActions[] = {
 };
 const unsigned nActions = sizeof(sActions) / sizeof(sActions[0]);
 
-const char* const genericMime = "application/octet-stream";
-const char* const archiveMime = "application/zip";
-const char* const scriptMime = "text/plain application/x-vnd.Be-elfexecutable";
+const char* const kArchiveMime = "application/zip";
+const char* const kScriptMime = "text/plain";
 
 
 RuleRunner::RuleRunner()
@@ -1432,31 +1430,25 @@ GetDirectoryPath(BString& str, const entry_ref& ref)
 static bool
 GetPathForRef(BString& str, const entry_ref& ref, const char* mime)
 {
-	BPath path(&ref);
-	if (path.InitCheck() != B_OK)
-		return false;
-
 	BEntry entry(&ref, true);
 	if (entry.InitCheck() != B_OK)
 		return false;
 
 	if (!entry.IsDirectory()) {
-		BNode node(&entry);
-		if (node.InitCheck() != B_OK)
+		entry_ref target;
+		if (entry.GetRef(&target) != B_OK)
 			return false;
 
-		attr_info info;
-		if (node.GetAttrInfo("BEOS:TYPE", &info) == B_OK
-			|| update_mime_info(path.Path(), NULL, 1,
-				B_UPDATE_MIME_INFO_NO_FORCE) == B_OK) {
-			BString mimeType;
-			if (node.ReadAttrString("BEOS:TYPE", &mimeType) == B_OK
-				&& strstr(mime, mimeType) == NULL
-				&& strcmp(mimeType, genericMime))
-				return false;
-		}
+		BMimeType mimeType;
+		if (BMimeType::GuessMimeType(&target, &mimeType) != B_OK
+			|| strcmp(mimeType.Type(), mime))
+			return false;
 	}
 
+	BPath path(&ref);
+	if (path.InitCheck() != B_OK)
+		return false;
+
 	str = path.Path();
 	return true;
 }
@@ -1494,9 +1486,9 @@ SetTextForType(BString& text, int8 type, const entry_ref& ref, bool isTest)
 			return true;
 		case ACTION_COMMAND:
 			return !entry.IsFile() ? false
-					: GetPathForRef(text, ref, scriptMime);
+					: GetPathForRef(text, ref, kScriptMime);
 		case ACTION_ARCHIVE:
-			return GetPathForRef(text, target, archiveMime);
+			return GetPathForRef(text, target, kArchiveMime);
 		default:
 			return false;
 	}
@@ -1506,24 +1498,11 @@ SetTextForType(BString& text, int8 type, const entry_ref& ref, bool isTest)
 bool
 SetTextForMime(BString& text, const entry_ref& ref)
 {
-	BNode node(&ref);
-	if (node.InitCheck() != B_OK)
-		return false;
-
-	attr_info info;
-	if (node.GetAttrInfo("BEOS:TYPE", &info) != B_OK) {
-		BPath path(&ref);
-		if (path.InitCheck() != B_OK
-			|| update_mime_info(path.Path(), NULL, 1,
-				B_UPDATE_MIME_INFO_NO_FORCE) != B_OK)
-			return false;
-	}
-
-	BString mimeType;
-	if (node.ReadAttrString("BEOS:TYPE", &mimeType) != B_OK)
+	BMimeType mimeType;
+	if (BMimeType::GuessMimeType(&ref, &mimeType) != B_OK)
 		return false;
 
-	text = mimeType;
+	text = mimeType.Type();
 	return true;
 }
 
diff --git a/sources/RuleRunner.h b/sources/RuleRunner.h
index 44612f0..f37f5d7 100644
--- a/sources/RuleRunner.h
+++ b/sources/RuleRunner.h
@@ -9,10 +9,6 @@
 #define RULERUNNER_H
 
 #include "FilerRule.h"
-#include "ObjectList.h"
-
-#include <Entry.h>
-#include <Message.h>
 
 struct NamePair
 {
@@ -31,9 +27,8 @@ extern const unsigned nActions;
 extern const char* const sSizeUnits[];
 extern const unsigned nSizeUnits;
 
-extern const char* const genericMime;
-extern const char* const archiveMime;
-extern const char* const scriptMime;
+extern const char* const kArchiveMime;
+extern const char* const kScriptMime;
 
 enum {
 	TEST_TYPE_NULL = 0,
diff --git a/sources/TypedRefFilter.cpp b/sources/TypedRefFilter.cpp
index b5ad4dc..cdfd6d4 100644
--- a/sources/TypedRefFilter.cpp
+++ b/sources/TypedRefFilter.cpp
@@ -1,11 +1,9 @@
 #include "TypedRefFilter.h"
 
-#include <fs_attr.h>
+#include <MimeType.h>
 
-#include <Mime.h>
-#include <Path.h>
+#include <compat/sys/stat.h>
 
-#include "RuleRunner.h"
 
 TypedRefFilter::TypedRefFilter()
 	:
@@ -61,27 +59,17 @@ TypedRefFilter::Filter(const entry_ref* ref, BNode* node, struct stat_beos* st,
 	const char* filetype)
 {
 	struct stat targetStat;
-	BString targetType;
-
+	entry_ref target(*ref);
 	bool isLink = S_ISLNK(st->st_mode);
+
 	if (isLink) {
 		BEntry entry(ref, true);
 		if (entry.InitCheck() == B_OK) {
 			if (entry.GetStat(&targetStat) == B_OK)
 				st = (struct stat_beos*) (&targetStat);
 
-			BNode target(&entry);
-			if (target.InitCheck() == B_OK) {
-				attr_info info;
-				BPath path(ref);
-
-				if ((target.GetAttrInfo("BEOS:TYPE", &info) == B_OK
-						|| path.InitCheck() == B_OK
-							&& update_mime_info(path.Path(), NULL, 1,
-								B_UPDATE_MIME_INFO_NO_FORCE) == B_OK)
-					&& target.ReadAttrString("BEOS:TYPE", &targetType) == B_OK)
-					filetype = targetType;
-			}
+			if (entry.GetRef(&target) != B_OK)
+				target = *ref;
 		}
 	}
 
@@ -97,6 +85,8 @@ TypedRefFilter::Filter(const entry_ref* ref, BNode* node, struct stat_beos* st,
 	if (fFileType.IsEmpty())
 		return true;
 
-	return isDir || fFileType.FindFirst(filetype) != B_ERROR
-			|| strcmp(filetype, genericMime) == 0;
+	BMimeType mimeType;
+
+	return isDir || fFileType == (BMimeType::GuessMimeType(&target, &mimeType)
+									== B_OK ? mimeType.Type() : filetype);
 }
diff --git a/sources/TypedRefFilter.h b/sources/TypedRefFilter.h
index 4722b47..f8cad99 100644
--- a/sources/TypedRefFilter.h
+++ b/sources/TypedRefFilter.h
@@ -4,8 +4,6 @@
 #include <FilePanel.h>
 #include <String.h>
 
-#include <compat/sys/stat.h>
-
 /*
 	This utility class is for filtering 
 */