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--- a/src/rcldb/rcldoc.h
+++ b/src/rcldb/rcldoc.h
@@ -232,6 +232,18 @@
 	}
 	return true;
     }
+
+    /* Is this document stored as a regular filesystem file ?
+     * (as opposed to e.g. a webcache file), not a subdoc, 
+     */
+    bool isFsFile() {
+        string backend;
+        getmeta(keybcknd, &backend);
+        if (!backend.empty() && backend.compare("FS"))
+            return false;
+        return true;
+    }
+
 
     void dump(bool dotext=false) const;