+#define kIOCommandPoolSizeKey "IOCommandPoolSize" // (OSNumber)
+
+// properties found in services that have transfer constraints
+#define kIOMaximumBlockCountReadKey "IOMaximumBlockCountRead" // (OSNumber)
+#define kIOMaximumBlockCountWriteKey "IOMaximumBlockCountWrite" // (OSNumber)
+#define kIOMaximumByteCountReadKey "IOMaximumByteCountRead" // (OSNumber)
+#define kIOMaximumByteCountWriteKey "IOMaximumByteCountWrite" // (OSNumber)
+#define kIOMaximumSegmentCountReadKey "IOMaximumSegmentCountRead" // (OSNumber)
+#define kIOMaximumSegmentCountWriteKey "IOMaximumSegmentCountWrite" // (OSNumber)
+#define kIOMaximumSegmentByteCountReadKey "IOMaximumSegmentByteCountRead" // (OSNumber)
+#define kIOMaximumSegmentByteCountWriteKey "IOMaximumSegmentByteCountWrite" // (OSNumber)
+
+// properties found in services that wish to describe an icon
+//
+// IOIcon =
+// {
+// CFBundleIdentifier = "com.example.driver.example";
+// IOBundleResourceFile = "example.icns";
+// };
+//
+// where IOBundleResourceFile is the filename of the resource
+
+#define kIOIconKey "IOIcon" // (OSDictionary)
+#define kIOBundleResourceFileKey "IOBundleResourceFile" // (OSString)
+
+#define kIOBusBadgeKey "IOBusBadge" // (OSDictionary)
+#define kIODeviceIconKey "IODeviceIcon" // (OSDictionary)
+
+// property of root that describes the machine's serial number as a string
+#define kIOPlatformSerialNumberKey "IOPlatformSerialNumber" // (OSString)