diff --git a/src/register/prdfScomRegister.H b/src/register/prdfScomRegister.H
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+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/diag/prdf/common/framework/register/prdfScomRegister.H $ */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 1996,2017                        */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+
+#ifndef iipScomRegister_h
+#define iipScomRegister_h
+
+/**
+ * @brief Models register.It does not contain target.
+ *
+ * This class stores the hash id and bit length of scom registers It models
+ * registers without maintaining target information. Instances of this class
+ * are shared across rule chip objects of same type.Once prd object model is
+ * built, instances of this register are saved in flyweight.These instances
+ * persist as long as prd object model survives.
+ */
+
+#include <iipscr.h>
+#include <iipbits.h>
+#include <iipMopRegisterAccess.h>
+#include <prdfTrace.H>
+
+namespace PRDF
+{
+
+// Forward References
+class CHIP_CLASS;
+class MopsRegisterAccess;
+class ExtensibleChip;
+
+class ScomRegister : public SCAN_COMM_REGISTER_CLASS
+{
+  public:
+
+    /**
+     * @brief     constructor
+     * @param     i_address        address of the register
+     * @param     i_bitLength      bit length of register
+     * @param     i_targetType     target type associated with register
+     */
+    ScomRegister( uint64_t i_address, uint32_t i_bitLength,
+                  TARGETING::TYPE i_targetType, AccessLevel i_access ) :
+        SCAN_COMM_REGISTER_CLASS(),
+        iv_bitLength( i_bitLength ),
+        iv_chipType( i_targetType ),
+        iv_scomAddress( i_address ),
+        iv_operationType( i_access )
+    {}
+
+    /**
+     * @brief     constructor .Added this because we save object of this type in
+     * @          FlyweightS
+     */
+    ScomRegister():
+        SCAN_COMM_REGISTER_CLASS(),
+        iv_bitLength( 0 ),
+        iv_chipType( TARGETING::TYPE_NA ),
+        iv_scomAddress( 0 ),
+        iv_operationType( ACCESS_NONE )
+    {}
+
+    /**
+     * @brief     Returns the pointer to bit string
+     * @param     i_type               attention type
+     * @return    BitString *   pointer to bit string
+     */
+
+    virtual const BitString * GetBitString(ATTENTION_TYPE i_type =
+                                                  INVALID_ATTENTION_TYPE) const;
+    /**
+     * @brief     Updates bit string contents associated with register
+     * @param     i_bs               poiner to bit string
+     * @return    Nil
+     */
+
+    virtual void SetBitString(const BitString * i_bs) ;
+
+    /**
+     * @brief     Returns length of the bits string associated with register
+     * @return    length of bit string
+     */
+    uint32_t GetBitLength(void) const { return iv_bitLength ;}
+
+    /**
+     * @brief     Directly reads from hardware register
+     * @return    SUCCESS|FAIL
+     */
+    virtual uint32_t ForceRead() const;
+
+    /**
+     * @brief     Returns contents of register.If entry does not exist in cache
+     *            a  fresh entry is created and hardware is read.
+     * @return    SUCCESS|FAIL
+    */
+    virtual uint32_t Read() const;
+
+    /**
+     * @brief     Writes cache contents to register.
+     * @return    SUCCESS|FAIL
+     */
+    virtual uint32_t Write();
+
+    /**
+     * @brief     Returns the hash id of register
+     * @return    returns  hash id of register
+     * @pre       None
+     * @post      None
+     * @note
+     */
+    virtual uint16_t GetId(void) const { return iv_shortId; };
+
+    /**
+     * @brief     Sets the hash id of register
+     * @param     i_id     hash id of register
+     * @return    Nil
+     */
+    virtual void SetId(uint16_t i_id) { iv_shortId = i_id; };
+
+   /**
+    * @brief    Returns type of Target associated with register.
+    * @return   Refer to function description
+    */
+   TARGETING::TYPE getChipType()const{ return iv_chipType ;} ;
+   /**
+    * @brief    Returns scom address of register
+    * @return   Refer to function description
+    */
+   uint64_t GetAddress( ) const {return iv_scomAddress ;};
+   /**
+    * @brief     compares two ScomRegisterAccess register for equality
+    * @param     i_rightRegister   register to be compared against
+    * @return    Returns true if registers are equal false otherwise
+    */
+   bool operator == ( const ScomRegister & i_rightRegister ) const ;
+   /**
+    * @brief     defines < operation for ScomRegisterAccess
+    * @param     i_rightRegister   register to be compared against
+    * @return    Returns false if i_rightRegisters is less and true otherwise
+    */
+   bool operator < ( const ScomRegister & i_rightRegister  ) const ;
+   /**
+    * @brief     defines >= operation for ScomRegisterAccess
+    * @param     i_rightRegister   register to be compared against
+    * @return    Returns true if registers is >= i_rightRegister false
+    *            otherwise
+    */
+   bool operator >= ( const ScomRegister & i_rightRegister  ) const;
+
+    /** @return The register access level (see enum AccessLevel). */
+    virtual AccessLevel getAccessLevel() const { return iv_operationType; }
+
+    /** @brief Sets the register access level (see enum AccessLevel). */
+    virtual void setAccessLevel( AccessLevel i_op ) { iv_operationType = i_op; }
+
+  protected: // Functions
+
+    /**
+     * @brief     copy constructor
+     * @param     i_scomRegister   scomRegister instance to be copied
+     */
+    ScomRegister( const SCAN_COMM_REGISTER_CLASS & i_scomRegister ):
+        SCAN_COMM_REGISTER_CLASS(),
+        iv_bitLength(     i_scomRegister.GetBitLength()   ),
+        iv_shortId(       i_scomRegister.GetId()          ),
+        iv_chipType(      i_scomRegister.getChipType()    ),
+        iv_scomAddress(   i_scomRegister.GetAddress()     ),
+        iv_operationType( i_scomRegister.getAccessLevel() )
+    {}
+
+   /**
+    * @brief    Returns reference to bit string associated with register
+    * @return   Refer to function description
+   */
+    virtual BitString & AccessBitString( );
+    /**
+     * @brief     Gets the register read and write done by calling access
+     *            function of scom  accessor service.
+     * @param     reference to bit string maintained in caller  class
+     * @param     Read or write operation
+     * @return    [SUCCESS|FAIL]
+     */
+    uint32_t Access( BitString & bs,
+                     MopRegisterAccess::Operation op )const;
+
+    /**
+     * @brief  Returns rulechip pointer associated with the register
+     * @return Refer to function description
+     */
+    virtual ExtensibleChip * getChip() const;
+
+private: // functions
+
+  friend class CaptureData;
+
+    /** @return TRUE if entry for this register exist in this cache. */
+    bool queryCache() const;
+
+    /**
+     * @brief  Reads register contents from cache.
+     * @return Reference to bit string buffer maintained in cache.
+     */
+    BitString & readCache() const;
+
+    /**
+     * @brief     Deletes one or all entry in the cache
+     * @param     RuleChip pointer associated with register
+     * @return    Nil
+     */
+    void flushCache( ExtensibleChip *i_pChip = NULL ) const;
+
+  private: // Data
+
+    uint32_t        iv_bitLength;     // bit length of scom
+    uint16_t        iv_shortId;       // unique hash id of register
+    TARGETING::TYPE iv_chipType;      // type of target associated with register
+    uint64_t        iv_scomAddress;   // scom address associated with regiser
+    AccessLevel     iv_operationType; // Operation supported (RO, WO, or RW)
+
+};
+
+}//namespace PRDF ends
+
+#endif