Correct mispelt 'd' and 'e' words.

Data/include/Poco/Data/SQLChannel.h

@@ -104,7 +104,7 @@ public:
 		///                  Table must exist in the target database. To disable archiving,
 		///                  set this property to empty string.
 		///
-		///     * async:     Indicates asynchronous execution. When excuting asynchronously,
+		///     * async:     Indicates asynchronous execution. When executing asynchronously,
 		///                  messages are sent to the target using asynchronous execution.
 		///                  However, prior to the next message being processed and sent to
 		///                  the target, the previous operation must have been either completed 

Data/include/Poco/Data/SessionImpl.h

@@ -170,7 +170,7 @@ public:
 protected:
 	void setConnectionString(const std::string& connectionString);
 		/// Sets the connection string. Should only be called on
-		/// disconnetced sessions. Throws InvalidAccessException when called on
+		/// disconnected sessions. Throws InvalidAccessException when called on
 		/// a connected session.
 
 private:

Data/include/Poco/Data/Statement.h

@@ -50,7 +50,7 @@ class Data_API Statement
 	/// It does not contain code of its own.
 	/// Its main purpose is to forward calls to the concrete StatementImpl stored inside.
 	/// Statement execution can be synchronous or asynchronous.
-	/// Synchronous ececution is achieved through execute() call, while asynchronous is
+	/// Synchronous execution is achieved through execute() call, while asynchronous is
 	/// achieved through executeAsync() method call.
 	/// An asynchronously executing statement should not be copied during the execution. 
 	///
@@ -68,7 +68,7 @@ class Data_API Statement
 	///
 	/// See individual functions documentation for more details.
 	///
-	/// Statement owns the RowFormatter, which can be provided externaly through setFormatter()
+	/// Statement owns the RowFormatter, which can be provided externally through setFormatter()
 	/// member function.
 	/// If no formatter is externally supplied to the statement, the SimpleRowFormatter is lazy
 	/// created and used.

Data/include/Poco/Data/Transaction.h

@@ -36,7 +36,7 @@ class Data_API Transaction
 	/// transaction is in progress. If not, a new transaction is created.
 	/// When the Transaction is destroyed, and commit() has been called,
 	/// nothing is done. Otherwise, the current transaction is rolled back.
-	/// See Transaction for more detaisl nad purpose of this template.
+	/// See Transaction for more details and purpose of this template.
 {
 public:
 	Transaction(Poco::Data::Session& session, Poco::Logger* pLogger = 0);

Data/include/Poco/Data/TypeHandler.h

@@ -97,7 +97,7 @@ class TypeHandler: public AbstractTypeHandler
 	///	
 	///		static void extract(std::size_t pos, Person& obj, const Person& defVal, AbstractExtractor::Ptr pExt)
 	///		{
-	///			// defVal is the default person we should use if we encunter NULL entries, so we take the individual fields
+	///			// defVal is the default person we should use if we encounter NULL entries, so we take the individual fields
 	///			// as defaults. You can do more complex checking, ie return defVal if only one single entry of the fields is null etc...
 	///			poco_assert_dbg (!pExt.isNull());
 	///			std::string lastName;