diff --git a/slides/020-snodec-ueberblick/01300_snode.c-application-server-socketcontext.tex b/slides/020-snodec-ueberblick/01300_snode.c-application-server-socketcontext.tex
index 68862e4..1cc0bd8 100644
--- a/slides/020-snodec-ueberblick/01300_snode.c-application-server-socketcontext.tex
+++ b/slides/020-snodec-ueberblick/01300_snode.c-application-server-socketcontext.tex
@@ -2,17 +2,19 @@
 
 \begin{frame}[fragile]{\texttt{SocketContext} of the Server}
   \begin{cppcode}[autogobble=true, caption={\alert{SocketContext} of the server.},captionpos=b]
+    #include <SemanticLog.h>
+
     class EchoServerContext : public core::socket::stream::SocketContext {
     public:
         using core::socket::stream::SocketContext::SocketContext; // constructor inheritance (since C++11)
 
     private:
         void onConnected() override {
-            VLOG(0) << "Echo connected to " << getSocketConnection()->getRemoteAddress().toString();
+            snode::semantic::appLog().trace() << "Echo connected to " << getSocketConnection()->getRemoteAddress().toString();
         }
 
         void onDisconnected() override {
-            VLOG(0) << "Echo disconnected from " << getSocketConnection()->getRemoteAddress().toString();
+            snode::semantic::appLog().trace() << "Echo disconnected from " << getSocketConnection()->getRemoteAddress().toString();
         }
 
         std::size_t onReceivedFromPeer() override {
@@ -20,7 +22,7 @@
 
             std::size_t junkLen = readFromPeer(junk, 4096);
             if (junkLen > 0) {
-                VLOG(0) << "Data to reflect: " << std::string(junk, junkLen);
+                snode::semantic::appLog().trace() << "Data to reflect: " << std::string(junk, junkLen);
                 sendToPeer(junk, junkLen);
             }
             return junkLen;
diff --git a/slides/020-snodec-ueberblick/01400_snode.c-application-client-socketcontext.tex b/slides/020-snodec-ueberblick/01400_snode.c-application-client-socketcontext.tex
index e34d496..a7f528e 100644
--- a/slides/020-snodec-ueberblick/01400_snode.c-application-client-socketcontext.tex
+++ b/slides/020-snodec-ueberblick/01400_snode.c-application-client-socketcontext.tex
@@ -2,19 +2,21 @@
 
 \begin{frame}[fragile]{\texttt{SocketContext} of the Client}
   \begin{cppcode}[autogobble=true, caption={\alert{SocketContext} of the client.},captionpos=b]
+    #include <SemanticLog.h>
+
     class EchoClientContext : public core::socket::stream::SocketContext {
     public:
         using core::socket::stream::SocketContext::SocketContext; // constructor inheritance (since C++11)
 
     private:
         void onConnected() override {.
-            VLOG(0) << "Echo connected to " << socketConnection->getRemoteAddress().toString();
-            VLOG(0) << "Initiating data exchange";
+            snode::semantic::appLog().trace() << "Echo connected to " << socketConnection->getRemoteAddress().toString();
+            snode::semantic::appLog().trace() << "Initiating data exchange";
             sendToPeer("Hello peer! It's nice talking to you!!!");
         }
 
         void onDisconnected() override {
-            VLOG(0) << "Echo disconnected from " << socketConnection->getRemoteAddress().toString();
+            snode::semantic::appLog().trace() << "Echo disconnected from " << socketConnection->getRemoteAddress().toString();
         }
 
         std::size_t onReceivedFromPeer() override {
@@ -22,7 +24,7 @@
 
             std::size_t junkLen = readFromPeer(junk, 4096);
             if (junkLen > 0) {
-                VLOG(0) << "Data to reflect: " << std::string(junk, junkLen);
+                snode::semantic::appLog().trace() << "Data to reflect: " << std::string(junk, junkLen);
                 sendToPeer(junk, junkLen);
             }
             return junkLen;
diff --git a/slides/020-snodec-ueberblick/01500_snode.c-application-server-main.tex b/slides/020-snodec-ueberblick/01500_snode.c-application-server-main.tex
index c2e2a76..1e119b6 100644
--- a/slides/020-snodec-ueberblick/01500_snode.c-application-server-main.tex
+++ b/slides/020-snodec-ueberblick/01500_snode.c-application-server-main.tex
@@ -3,6 +3,7 @@
 \begin{frame}[fragile]{The IPv4 Server Application}
   \begin{cppcode}[autogobble=true, caption={IPv4 server application.},captionpos=b, morekeywords={[2]{SocketServer,EchoServerContextFactory,listen}}]
     #include "EchoServerContextFactory.h"
+    #include <SemanticLog.h>
     #include <net/in/stream/legacy/SocketServer.h>
 
     int main(int argc, char* argv[]) {
@@ -15,16 +16,16 @@
                                       const core::socket::State& state) -> void {
         switch (state) {
             case core::socket::State::OK:
-                VLOG(1) << "EchoServer: connected to '" << socketAddress.toString() << "'";
+                snode::semantic::appLog().trace() << "EchoServer: connected to '" << socketAddress.toString() << "'";
                 break;
             case core::socket::State::DISABLED:
-                VLOG(1) << "EchoServer: disabled";
+                snode::semantic::appLog().trace() << "EchoServer: disabled";
                 break;
             case core::socket::State::ERROR:
-                LOG(ERROR) << "EchoServer: " << socketAddress.toString() << ": " << state.what();
+                snode::semantic::appLog().error() << "EchoServer: " << socketAddress.toString() << ": " << state.what();
                 break;
             case core::socket::State::FATAL:
-                LOG(FATAL) << "EchoServer: " << socketAddress.toString() << ": " << state.what();
+                snode::semantic::appLog().critical() << "EchoServer: " << socketAddress.toString() << ": " << state.what();
                 break;
         }
         return core::SNodeC::start();
diff --git a/slides/020-snodec-ueberblick/01600_snode.c-application-client-main.tex b/slides/020-snodec-ueberblick/01600_snode.c-application-client-main.tex
index 4860852..433eee5 100644
--- a/slides/020-snodec-ueberblick/01600_snode.c-application-client-main.tex
+++ b/slides/020-snodec-ueberblick/01600_snode.c-application-client-main.tex
@@ -3,6 +3,7 @@
 \begin{frame}[fragile]{The IPv4 Client Application}
   \begin{cppcode}[autogobble=true, caption={IPv4 client application.},captionpos=b,, morekeywords={[2]{SocketClient,EchoClientContextFactory,connect}}]
     #include "EchoClientContextFactory.h"
+    #include <SemanticLog.h>
     #include <net/in/stream/legacy/SocketClient.h>
 
     int main(int argc, char* argv[]) {
@@ -15,16 +16,16 @@
                                                   const core::socket::State& state) -> void {
         switch (state) {
             case core::socket::State::OK:
-                VLOG(1) << "EchoClient: connected to '" << socketAddress.toString() << "'";
+                snode::semantic::appLog().trace() << "EchoClient: connected to '" << socketAddress.toString() << "'";
                 break;
             case core::socket::State::DISABLED:
-                VLOG(1) << "EchoClient: disabled";
+                snode::semantic::appLog().trace() << "EchoClient: disabled";
                 break;
             case core::socket::State::ERROR:
-                LOG(ERROR) << "EchoClient: " << socketAddress.toString() << ": " << state.what();
+                snode::semantic::appLog().error() << "EchoClient: " << socketAddress.toString() << ": " << state.what();
                 break;
             case core::socket::State::FATAL:
-                LOG(FATAL) << "EchoClient: " << socketAddress.toString() << ": " << state.what();
+                snode::semantic::appLog().critical() << "EchoClient: " << socketAddress.toString() << ": " << state.what();
                 break;
         }
         return core::SNodeC::start();
diff --git a/slides/020-snodec-ueberblick/02710_websocket-application-client.tex b/slides/020-snodec-ueberblick/02710_websocket-application-client.tex
index 1e6a471..2193899 100644
--- a/slides/020-snodec-ueberblick/02710_websocket-application-client.tex
+++ b/slides/020-snodec-ueberblick/02710_websocket-application-client.tex
@@ -1,6 +1,7 @@
 \begin{frame}[fragile]{WebSocket Client-Application}
   \begin{cppcode}[autogobble=true, caption={WebSocket Client-Application.},captionpos=b,morekeywords={[2]{upgrade,connect,Request,Response}}]
         #include "web/http/legacy/in/Client.h"
+        #include <SemanticLog.h>
 
         using LegacyClient = web::http::legacy::in::Client;
         using Request = LegacyClient::Request;
@@ -8,19 +9,19 @@
 
         const LegacyClient legacyClient(
             [](const std::shared_ptr<Request>& req) -> void { // Connection start and therefore also Request start
-                LOG(INFO) << "OnRequestBegin";
+                snode::semantic::appLog().info() << "OnRequestBegin";
                 req->set("Sec-WebSocket-Protocol", "echo");
                 req->upgrade("/ws/", "websocket",
                              [](const std::shared_ptr<Request>& req,
                                 const std::shared_ptr<Response>& res) -> void {
-                        VLOG(1) << "OnResponse";
+                        snode::semantic::appLog().trace() << "OnResponse";
                         req->upgrade(res, [](bool success) -> void {
                                 // Failure processing (logging)
                         });
                     });
             },
             [](const std::shared_ptr<Request>& req) -> void {// Connection and therefore also Request end
-                LOG(INFO) << "OnRequestEnd";
+                snode::semantic::appLog().info() << "OnRequestEnd";
             }
         );
 
diff --git a/slides/020-snodec-ueberblick/09000_test.tex b/slides/020-snodec-ueberblick/09000_test.tex
index e9ec853..33daa88 100644
--- a/slides/020-snodec-ueberblick/09000_test.tex
+++ b/slides/020-snodec-ueberblick/09000_test.tex
@@ -33,6 +33,8 @@
 %  \begin{cppcode}[autogobble=true,alsoletter={?_},
 %    columns=fullflexible,
 %    morekeywords={using},morekeywords={[2]{SocketContext,Test}}]
+%    #include <SemanticLog.h>
+%
 %    class EchoServerContext : public core::socket::stream::SocketContext {
 %    public:
 %        using core::socket::stream::SocketContext::SocketContext<Test>; // constructor inheritance (since C++11)
@@ -43,7 +45,7 @@
 %
 %            std::size_t<int> junkLen = readFromPeer(junk, 4096);
 %            if (junkLen > 0) {
-%                VLOG(0) << "Data to reflect: " << std::string(junk, junkLen);
+%                snode::semantic::appLog().trace() << "Data to reflect: " << std::string(junk, junkLen);
 %                sendToPeer(junk, junkLen);
 %            }
 %            return junkLen;