diff --git a/src/client/pv/monitor.h b/src/client/pv/monitor.h
index fa5c483..4e10bc8 100644
--- a/src/client/pv/monitor.h
+++ b/src/client/pv/monitor.h
@@ -18,13 +18,13 @@
 #include <pv/pvData.h>
 #include <pv/sharedPtr.h>
 #include <pv/bitSet.h>
-#include <pv/requester.h>
 
 #ifdef monitorEpicsExportSharedSymbols
 #   define epicsExportSharedSymbols
 #	undef monitorEpicsExportSharedSymbols
 #endif
 
+#include <pv/requester.h>
 #include <pv/destroyable.h>
 
 #include <shareLib.h>
diff --git a/src/server/pv/baseChannelRequester.h b/src/server/pv/baseChannelRequester.h
index 144acfa..5dd00d3 100644
--- a/src/server/pv/baseChannelRequester.h
+++ b/src/server/pv/baseChannelRequester.h
@@ -7,17 +7,7 @@
 #ifndef BASECHANNELREQUESTER_H_
 #define BASECHANNELREQUESTER_H_
 
-#ifdef epicsExportSharedSymbols
-#   define baseChannelRequesterEpicsExportSharedSymbols
-#   undef epicsExportSharedSymbols
-#endif
-
 #include <pv/requester.h>
-#ifdef baseChannelRequesterEpicsExportSharedSymbols
-#   define epicsExportSharedSymbols
-#	undef baseChannelRequesterEpicsExportSharedSymbols
-#endif
-
 #include <pv/destroyable.h>
 #include <pv/serverContextImpl.h>
 #include <pv/serverChannelImpl.h>
diff --git a/src/utils/pv/requester.h b/src/utils/pv/requester.h
index f27d1ba..8b4e114 100644
--- a/src/utils/pv/requester.h
+++ b/src/utils/pv/requester.h
@@ -15,7 +15,7 @@
 
 #include <shareLib.h>
 
-namespace epics { namespace pvData { 
+namespace epics { namespace pvAccess {
 
 class Requester;
 typedef std::tr1::shared_ptr<Requester> RequesterPtr;
@@ -27,45 +27,31 @@ enum MessageType {
 
 epicsShareExtern std::string getMessageTypeName(MessageType messageType);
 
-/**
- *  @brief Callback class for passing messages to a requester.
- *
- *  This is used by many other classes and also extended by other classes.
- *  The request is passed a message and a messageType.
- *  A message is just a string and a messageType is:
-@code
-enum MessageType {
-   infoMessage,warningMessage,errorMessage,fatalErrorMessage
-};
-@endcode
- *
+/** @brief Callback class for passing messages to a requester.
  */
-
 class epicsShareClass Requester {
 public:
     POINTER_DEFINITIONS(Requester);
-    /**
-     * Destructor
-     */
     virtual ~Requester(){}
     /**
      * The requester must have a name.
      * @return The requester's name.
      */
     virtual std::string getRequesterName() = 0;
-    /**
-     * 
-     * A message for the requester.
-     * @param message The message.
-     * @param messageType The type of message:
-     @code
-     enum MessageType {
-        infoMessage,warningMessage,errorMessage,fatalErrorMessage
-     };
-     @endcode
+    /** Push notification
      */
-    virtual void message(std::string const & message,MessageType messageType);
+    virtual void message(std::string const & message,MessageType messageType = errorMessage);
 };
 
+}}
+namespace epics { namespace pvData {
+using ::epics::pvAccess::Requester;
+using ::epics::pvAccess::RequesterPtr;
+using ::epics::pvAccess::MessageType;
+using ::epics::pvAccess::getMessageTypeName;
+using ::epics::pvAccess::infoMessage;
+using ::epics::pvAccess::warningMessage;
+using ::epics::pvAccess::errorMessage;
+using ::epics::pvAccess::fatalErrorMessage;
 }}
 #endif  /* REQUESTER_H */
diff --git a/src/utils/requester.cpp b/src/utils/requester.cpp
index 69599a6..6927e68 100644
--- a/src/utils/requester.cpp
+++ b/src/utils/requester.cpp
@@ -12,28 +12,25 @@
 
 #include <epicsMutex.h>
 
-#define epicsExportSharedSymbols
 #include <pv/lock.h>
+
+#define epicsExportSharedSymbols
 #include <pv/requester.h>
 
 using std::string;
 
-namespace epics { namespace pvData { 
+namespace epics { namespace pvAccess {
 
-static StringArray messageTypeName(MESSAGE_TYPE_COUNT);
 
 string getMessageTypeName(MessageType messageType)
 {
-    // TODO not thread-safe
-    static Mutex mutex;
-    Lock xx(mutex);
-    if(messageTypeName[0].size()==0) {
-        messageTypeName[0] = "info";
-        messageTypeName[1] = "warning";
-        messageTypeName[2] = "error";
-        messageTypeName[3] = "fatalError";
+    switch(messageType) {
+    case infoMessage: return "info";
+    case warningMessage: return "warning";
+    case errorMessage: return "error";
+    case fatalErrorMessage: return "fatalError";
+    default: return "unknown";
     }
-    return messageTypeName[messageType];
 }
 
 void Requester::message(std::string const & message,MessageType messageType)