diff --git a/MdePkg/Include/Ppi/CpuIo.h b/MdePkg/Include/Ppi/CpuIo.h
index 1cc6e989ba..cdb83a92d4 100644
--- a/MdePkg/Include/Ppi/CpuIo.h
+++ b/MdePkg/Include/Ppi/CpuIo.h
@@ -28,11 +28,11 @@
 
 typedef struct _EFI_PEI_CPU_IO_PPI  EFI_PEI_CPU_IO_PPI;
 
-//
-// *******************************************************
-// EFI_PEI_CPU_IO_PPI_WIDTH
-// *******************************************************
-//
+///
+/// *******************************************************
+/// EFI_PEI_CPU_IO_PPI_WIDTH
+/// *******************************************************
+///
 typedef enum {
   EfiPeiCpuIoWidthUint8,
   EfiPeiCpuIoWidthUint16,
@@ -74,11 +74,11 @@ EFI_STATUS
   IN  OUT VOID                          *Buffer
   );
 
-//
-// *******************************************************
-// EFI_PEI_CPU_IO_PPI_ACCESS
-// *******************************************************
-//
+///
+/// *******************************************************
+/// EFI_PEI_CPU_IO_PPI_ACCESS
+/// *******************************************************
+///
 typedef struct {
   EFI_PEI_CPU_IO_PPI_IO_MEM Read;
   EFI_PEI_CPU_IO_PPI_IO_MEM Write;
diff --git a/MdePkg/Include/Ppi/FirmwareVolume.h b/MdePkg/Include/Ppi/FirmwareVolume.h
index 5a8f87c49b..1bc96796ab 100644
--- a/MdePkg/Include/Ppi/FirmwareVolume.h
+++ b/MdePkg/Include/Ppi/FirmwareVolume.h
@@ -19,11 +19,11 @@
 #ifndef __FIRMWARE_VOLUME_PPI_H__
 #define __FIRMWARE_VOLUME_PPI_H__
 
-//
-// The GUID for this PPI is the same as the firmware volume format GUID.
-// can be EFI_FIRMWARE_FILE_SYSTEM2_GUID or the GUID for a user-defined format. The
-// EFI_FIRMWARE_FILE_SYSTEM2_GUID is the PI Firmware Volume format.
-// 
+///
+/// The GUID for this PPI is the same as the firmware volume format GUID.
+/// can be EFI_FIRMWARE_FILE_SYSTEM2_GUID or the GUID for a user-defined format. The
+/// EFI_FIRMWARE_FILE_SYSTEM2_GUID is the PI Firmware Volume format.
+/// 
 
 typedef struct _EFI_PEI_FIRMWARE_VOLUME_PPI   EFI_PEI_FIRMWARE_VOLUME_PPI;
 
diff --git a/MdePkg/Include/Ppi/LoadImage.h b/MdePkg/Include/Ppi/LoadImage.h
index 1c180a70aa..5d07fd96b8 100644
--- a/MdePkg/Include/Ppi/LoadImage.h
+++ b/MdePkg/Include/Ppi/LoadImage.h
@@ -26,7 +26,7 @@
 
 typedef struct _EFI_PEI_LOADED_IMAGE_PPI  EFI_PEI_LOADED_IMAGE_PPI;
 
-/*
+/**
   @par Ppi Description:
   This interface is installed by the PEI Dispatcher after the image has been
   loaded and after all security checks have been performed, 
diff --git a/MdePkg/Include/Ppi/PciCfg2.h b/MdePkg/Include/Ppi/PciCfg2.h
index d44ee09ef0..b741cb7279 100644
--- a/MdePkg/Include/Ppi/PciCfg2.h
+++ b/MdePkg/Include/Ppi/PciCfg2.h
@@ -37,9 +37,9 @@ typedef struct _EFI_PEI_PCI_CFG2_PPI   EFI_PEI_PCI_CFG2_PPI;
   ((func) << 8) | \
   ((reg) < 256 ? (reg) : ((UINT64)(reg) << 32)));
 
-//
-// EFI_PEI_PCI_CFG_PPI_WIDTH
-//
+///
+/// EFI_PEI_PCI_CFG_PPI_WIDTH
+///
 typedef enum {
   EfiPeiPciCfgWidthUint8  = 0,
   EfiPeiPciCfgWidthUint16 = 1,
@@ -48,9 +48,9 @@ typedef enum {
   EfiPeiPciCfgWidthMaximum
 } EFI_PEI_PCI_CFG_PPI_WIDTH;
 
-//
-// EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS
-//
+///
+/// EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS
+///
 typedef struct {
   UINT8   Register;
   UINT8   Function;
diff --git a/MdePkg/Include/Ppi/SecPlatformInformation.h b/MdePkg/Include/Ppi/SecPlatformInformation.h
index b1651129b7..fc5c366869 100644
--- a/MdePkg/Include/Ppi/SecPlatformInformation.h
+++ b/MdePkg/Include/Ppi/SecPlatformInformation.h
@@ -32,11 +32,11 @@
 typedef struct _EFI_SEC_PLATFORM_INFORMATION_PPI EFI_SEC_PLATFORM_INFORMATION_PPI;
 
 
-//
-// EFI_HEALTH_FLAGS
-// Contains information generated by microcode, hardware, and/or the Itanium
-// processor PAL code about the state of the processor upon reset.
-//
+///
+/// EFI_HEALTH_FLAGS
+/// Contains information generated by microcode, hardware, and/or the Itanium
+/// processor PAL code about the state of the processor upon reset.
+///
 typedef union {
   struct {
     UINT32   Status                   : 2;
diff --git a/MdePkg/Include/Ppi/TemporaryRamSupport.h b/MdePkg/Include/Ppi/TemporaryRamSupport.h
index 26afa7f62b..76e7c923ee 100644
--- a/MdePkg/Include/Ppi/TemporaryRamSupport.h
+++ b/MdePkg/Include/Ppi/TemporaryRamSupport.h
@@ -24,7 +24,7 @@
   { 0xdbe23aa9, 0xa345, 0x4b97, {0x85, 0xb6, 0xb2, 0x26, 0xf1, 0x61, 0x73, 0x89} }
 
 
-/*
+/**
   This service of the TEMPORARY_RAM_SUPPORT_PPI that migrates temporary RAM into
   permanent memory.