diff --git a/include/shell.hpp b/include/shell.hpp
index 37ce167..042bb8b 100644
--- a/include/shell.hpp
+++ b/include/shell.hpp
@@ -52,27 +52,41 @@ namespace ztd
   */
   int pclose2(FILE* fp, pid_t pid);
 
+
+  //! @brief Shell call class
   class shc
   {
   public:
+    //! @brief constructor
     shc(std::string const& cmd="", bool const cout=false);
     virtual ~shc();
 
+    //! @brief Start the command
     void run();
+    //! @brief Kill the command (SIGINT)
     int kill_int();
 
+    //! @brief Wait until the command gives output
     void wait_output();
+    //! @brief Retrieve a line from the command's output
     std::string get_output();
 
+    //! @brief Wait for the command to finish
     void wait_finish();
 
+    //! @brief Command to execute
     std::string command;
+    //! @brief Output the command result to console
     bool to_console;
 
+    //! @brief Run status of the command
     bool running;
+    //! @brief PID of the command (only during execution)
     pid_t pid;
 
+    //! @brief Output lines of the command
     std::queue<std::string> output;
+    //! @brief Return value on the command (only after execution)
     int return_value;
 
     ztd::wait_pool wp_output;
diff --git a/md/filedat.md b/md/filedat.md
index 60681a9..d777537 100644
--- a/md/filedat.md
+++ b/md/filedat.md
@@ -14,7 +14,7 @@ Everything is a string, there are no number or boolean types
 ### Map Chunk
 
 A map chunk consists of pairs of keys and values.  
-Key separators are \n and ;  
+Key separators are \\n and ;  
 
 Format is as follows:  
 ```
@@ -161,5 +161,5 @@ catch (ztd::format_error& fe)
   printFormatException(fe);
 }
 ```
-If origin is known, printFormatException will print only the relevant line with location <br>
+If origin is known, printFormatException will print only the relevant line with location \n
 If origin is unknown, printFormatException will print the whole data until the discriminating line