diff --git a/cib/Makefile.am b/cib/Makefile.am
index 79e45ae90..9b33ce5c2 100644
--- a/cib/Makefile.am
+++ b/cib/Makefile.am
@@ -32,6 +32,7 @@ libcib_la_CPPFLAGS = \
 	-DI2_CIB_BUILD \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga \
 	-I${top_srcdir}/third-party/popen-noshell
@@ -46,6 +47,7 @@ libcib_la_LIBADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/jsonrpc/libjsonrpc.la \
 	${top_builddir}/icinga/libicinga.la \
 	${top_builddir}/third-party/popen-noshell/libpopen_noshell.la
diff --git a/cib/cib.cpp b/cib/cib.cpp
index fa2ac41b6..e09c73f8b 100644
--- a/cib/cib.cpp
+++ b/cib/cib.cpp
@@ -14,9 +14,12 @@ void CIB::RequireInformation(InformationType types)
 	Component::Ptr component = app->GetComponent("cibsync");
 
 	if (!component) {
-		ConfigObject::Ptr cibsyncComponentConfig = boost::make_shared<ConfigObject>("component", "cibsync");
-		cibsyncComponentConfig->SetLocal(true);
-		cibsyncComponentConfig->Commit();
+		ConfigItemBuilder::Ptr cb = boost::make_shared<ConfigItemBuilder>();
+		cb->SetType("component");
+		cb->SetName("cibsync");
+		cb->SetLocal(true);
+		ConfigItem::Ptr ci = cb->Compile();
+		ci->Commit();
 	}
 }
 
diff --git a/cib/i2-cib.h b/cib/i2-cib.h
index 5811b441a..83a2b79fb 100644
--- a/cib/i2-cib.h
+++ b/cib/i2-cib.h
@@ -8,6 +8,7 @@
  * updates from all the other Icinga components.
  */
 
+#include <i2-dyn.h>
 #include <i2-icinga.h>
 
 #ifdef I2_CIB_BUILD
diff --git a/components/checker/Makefile.am b/components/checker/Makefile.am
index fddd0dce5..798047c7f 100644
--- a/components/checker/Makefile.am
+++ b/components/checker/Makefile.am
@@ -11,6 +11,7 @@ checker_la_SOURCES = \
 checker_la_CPPFLAGS = \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga \
 	-I${top_srcdir}/cib
@@ -26,6 +27,7 @@ checker_la_LIBADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/jsonrpc/libjsonrpc.la \
 	${top_builddir}/icinga/libicinga.la \
 	${top_builddir}/cib/libcib.la
diff --git a/components/cibsync/Makefile.am b/components/cibsync/Makefile.am
index df926a9b7..c2fab7fa2 100644
--- a/components/cibsync/Makefile.am
+++ b/components/cibsync/Makefile.am
@@ -11,6 +11,7 @@ cibsync_la_SOURCES = \
 cibsync_la_CPPFLAGS = \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga \
 	-I${top_srcdir}/cib
@@ -26,6 +27,7 @@ cibsync_la_LIBADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/jsonrpc/libjsonrpc.la \
 	${top_builddir}/icinga/libicinga.la \
 	${top_builddir}/cib/libcib.la
diff --git a/components/compat/Makefile.am b/components/compat/Makefile.am
index 8d868d1fd..7d758ebd3 100644
--- a/components/compat/Makefile.am
+++ b/components/compat/Makefile.am
@@ -11,6 +11,7 @@ compat_la_SOURCES = \
 compat_la_CPPFLAGS = \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga \
 	-I${top_srcdir}/cib
@@ -26,6 +27,7 @@ compat_la_LIBADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/jsonrpc/libjsonrpc.la \
 	${top_builddir}/icinga/libicinga.la \
 	${top_builddir}/cib/libcib.la
diff --git a/components/convenience/conveniencecomponent.cpp b/components/convenience/conveniencecomponent.cpp
index 644427c50..02cb6306b 100644
--- a/components/convenience/conveniencecomponent.cpp
+++ b/components/convenience/conveniencecomponent.cpp
@@ -73,7 +73,8 @@ void ConvenienceComponent::HostCommittedHandler(const ConfigItem::Ptr& item)
 		Dictionary::Iterator it;
 		for (it = serviceDescs->Begin(); it != serviceDescs->End(); it++) {
 			Variant desc = it->second;
-			ConfigItem::Ptr serviceItem;
+
+			ConfigItemBuilder::Ptr builder = boost::make_shared<ConfigItemBuilder>(item->GetDebugInfo());
 
 			string name;
 
@@ -82,60 +83,34 @@ void ConvenienceComponent::HostCommittedHandler(const ConfigItem::Ptr& item)
 				namebuf << item->GetName() << "-" << string(desc);
 				name = namebuf.str();
 
-				serviceItem = boost::make_shared<ConfigItem>("service", name, item->GetDebugInfo());
-				serviceItem->AddParent(desc);
+				builder->SetType("service");
+				builder->SetName(name);
 
-				ExpressionList::Ptr exprl = boost::make_shared<ExpressionList>();
-
-				Expression localExpr("__local", OperatorSet, 1, item->GetDebugInfo());
-				exprl->AddExpression(localExpr);
-
-				Expression abstractExpr("__abstract", OperatorSet, 0, item->GetDebugInfo());
-				exprl->AddExpression(abstractExpr);
-
-				Expression typeExpr("__type", OperatorSet, "service", item->GetDebugInfo());
-				exprl->AddExpression(typeExpr);
-
-				Expression nameExpr("__name", OperatorSet, name, item->GetDebugInfo());
-				exprl->AddExpression(nameExpr);
-
-				Expression hostExpr("host_name", OperatorSet, item->GetName(), item->GetDebugInfo());
-				exprl->AddExpression(hostExpr);
-
-				Expression aliasExpr("alias", OperatorSet, string(desc), item->GetDebugInfo());
-				exprl->AddExpression(aliasExpr);
+				builder->AddParent(desc);
+				builder->AddExpression("host_name", OperatorSet, item->GetName());
+				builder->AddExpression("alias", OperatorSet, string(desc));
 
 				Dictionary::Ptr macros;
-				if (host->GetProperty("macros", &macros)) {
-					Expression macrosExpr("macros", OperatorPlus, macros, item->GetDebugInfo());
-					exprl->AddExpression(macrosExpr);
-				}
+				if (host->GetProperty("macros", &macros))
+					builder->AddExpression("macros", OperatorPlus, macros);
 
 				long checkInterval;
-				if (host->GetProperty("check_interval", &checkInterval)) {
-					Expression checkExpr("check_interval", OperatorSet, checkInterval, item->GetDebugInfo());
-					exprl->AddExpression(checkExpr);
-				}
+				if (host->GetProperty("check_interval", &checkInterval))
+					builder->AddExpression("check_interval", OperatorSet, checkInterval);
 
 				long retryInterval;
-				if (host->GetProperty("retry_interval", &retryInterval)) {
-					Expression retryExpr("retry_interval", OperatorSet, retryInterval, item->GetDebugInfo());
-					exprl->AddExpression(retryExpr);
-				}
+				if (host->GetProperty("retry_interval", &retryInterval))
+					builder->AddExpression("retry_interval", OperatorSet, retryInterval);
 
 				Dictionary::Ptr sgroups;
-				if (host->GetProperty("servicegroups", &sgroups)) {
-					Expression sgroupsExpr("servicegroups", OperatorPlus, sgroups, item->GetDebugInfo());
-					exprl->AddExpression(sgroupsExpr);
-				}
+				if (host->GetProperty("servicegroups", &sgroups))
+					builder->AddExpression("servicegroups", OperatorPlus, sgroups);
 
 				Dictionary::Ptr checkers;
-				if (host->GetProperty("checkers", &checkers)) {
-					Expression checkersExpr("checkers", OperatorSet, checkers, item->GetDebugInfo());
-					exprl->AddExpression(checkersExpr);
-				}
+				if (host->GetProperty("checkers", &checkers))
+					builder->AddExpression("checkers", OperatorSet, checkers);
 
-				serviceItem->SetExpressionList(exprl);
+				ConfigItem::Ptr serviceItem = builder->Compile();
 				ConfigObject::Ptr service = serviceItem->Commit();
 
 				newServices->SetProperty(name, serviceItem);
diff --git a/components/delegation/Makefile.am b/components/delegation/Makefile.am
index 5e9f41f8c..47c87284c 100644
--- a/components/delegation/Makefile.am
+++ b/components/delegation/Makefile.am
@@ -11,6 +11,7 @@ delegation_la_SOURCES = \
 delegation_la_CPPFLAGS = \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga \
 	-I${top_srcdir}/cib
@@ -26,6 +27,7 @@ delegation_la_LIBADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/jsonrpc/libjsonrpc.la \
 	${top_builddir}/icinga/libicinga.la \
 	${top_builddir}/cib/libcib.la
diff --git a/components/demo/Makefile.am b/components/demo/Makefile.am
index 3fd22751f..14e40db9b 100644
--- a/components/demo/Makefile.am
+++ b/components/demo/Makefile.am
@@ -11,6 +11,7 @@ demo_la_SOURCES = \
 demo_la_CPPFLAGS = \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga
 
@@ -25,5 +26,6 @@ demo_la_LIBADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/jsonrpc/libjsonrpc.la \
 	${top_builddir}/icinga/libicinga.la
diff --git a/components/discovery/Makefile.am b/components/discovery/Makefile.am
index 9dd6ebd1e..7a41350a9 100644
--- a/components/discovery/Makefile.am
+++ b/components/discovery/Makefile.am
@@ -13,6 +13,7 @@ discovery_la_SOURCES =  \
 discovery_la_CPPFLAGS = \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga \
 	-I${top_srcdir}/cib
@@ -28,6 +29,7 @@ discovery_la_LIBADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/jsonrpc/libjsonrpc.la \
 	${top_builddir}/icinga/libicinga.la \
 	${top_builddir}/cib/libcib.la
diff --git a/dyn/Makefile.am b/dyn/Makefile.am
index 31ee61811..4a6377b79 100644
--- a/dyn/Makefile.am
+++ b/dyn/Makefile.am
@@ -16,6 +16,8 @@ libdyn_la_SOURCES = \
 	i2-dyn.h \
 	configitem.cpp \
 	configitem.h \
+	configitembuilder.cpp \
+	configitembuilder.h \
 	debuginfo.h \
 	expression.cpp \
 	expression.h \
diff --git a/dyn/config_parser.cc b/dyn/config_parser.cc
index 55640951f..48a966fc2 100644
--- a/dyn/config_parser.cc
+++ b/dyn/config_parser.cc
@@ -223,7 +223,7 @@ void yyerror(YYLTYPE *locp, ConfigCompiler *context, const char *err)
 int yyparse(ConfigCompiler *context);
 
 static stack<ExpressionList::Ptr> m_ExpressionLists;
-static ConfigItem::Ptr m_Object;
+static ConfigItemBuilder::Ptr m_Item;
 static bool m_Abstract;
 static bool m_Local;
 static Dictionary::Ptr m_Array;
@@ -543,10 +543,10 @@ static const yytype_int8 yyrhs[] =
 static const yytype_uint16 yyrline[] =
 {
        0,   100,   100,   101,   104,   104,   107,   113,   118,   113,
-     148,   149,   152,   156,   162,   163,   166,   173,   174,   178,
-     177,   189,   190,   192,   193,   194,   197,   205,   219,   228,
-     229,   230,   231,   232,   238,   243,   247,   253,   254,   255,
-     262,   261,   273,   279,   280,   282,   284,   285
+     138,   139,   142,   146,   152,   153,   156,   163,   164,   168,
+     167,   179,   180,   182,   183,   184,   187,   195,   209,   218,
+     219,   220,   221,   222,   228,   233,   237,   243,   244,   245,
+     252,   251,   263,   269,   270,   272,   274,   275
 };
 #endif
 
@@ -1588,9 +1588,9 @@ yyreduce:
 /* Line 1806 of yacc.c  */
 #line 118 "config_parser.yy"
     {
-		m_Object = boost::make_shared<ConfigItem>((yyvsp[(4) - (5)].text), (yyvsp[(5) - (5)].text), yylloc);
-		free((yyvsp[(4) - (5)].text));
-		free((yyvsp[(5) - (5)].text));
+		m_Item = boost::make_shared<ConfigItemBuilder>(yylloc);
+		m_Item->SetType((yyvsp[(4) - (5)].text));
+		m_Item->SetName((yyvsp[(5) - (5)].text));
 	}
     break;
 
@@ -1603,29 +1603,19 @@ yyreduce:
 		delete (yyvsp[(8) - (8)].variant);
 		ExpressionList::Ptr exprl = dynamic_pointer_cast<ExpressionList>(exprl_object);
 
-		Expression typeexpr("__type", OperatorSet, m_Object->GetType(), yylloc);
-		exprl->AddExpression(typeexpr);
+		m_Item->AddExpressionList(exprl);
+		m_Item->SetLocal(m_Local);
+		m_Item->SetAbstract(m_Abstract);
 
-		Expression nameexpr("__name", OperatorSet, m_Object->GetName(), yylloc);
-		exprl->AddExpression(nameexpr);
-
-		Expression abstractexpr("__abstract", OperatorSet, m_Abstract ? 1 : 0, yylloc);
-		exprl->AddExpression(abstractexpr);
-
-		Expression localexpr("__local", OperatorSet, m_Local ? 1 : 0, yylloc);
-		exprl->AddExpression(localexpr);
-
-		m_Object->SetExpressionList(exprl);
-
-		context->AddObject(m_Object);
-		m_Object.reset();
+		context->AddObject(m_Item->Compile());
+		m_Item.reset();
 	}
     break;
 
   case 12:
 
 /* Line 1806 of yacc.c  */
-#line 153 "config_parser.yy"
+#line 143 "config_parser.yy"
     {
 		m_Abstract = true;
 	}
@@ -1634,7 +1624,7 @@ yyreduce:
   case 13:
 
 /* Line 1806 of yacc.c  */
-#line 157 "config_parser.yy"
+#line 147 "config_parser.yy"
     {
 		m_Local = true;
 	}
@@ -1643,9 +1633,9 @@ yyreduce:
   case 16:
 
 /* Line 1806 of yacc.c  */
-#line 167 "config_parser.yy"
+#line 157 "config_parser.yy"
     {
-		m_Object->AddParent((yyvsp[(1) - (1)].text));
+		m_Item->AddParent((yyvsp[(1) - (1)].text));
 		free((yyvsp[(1) - (1)].text));
 	}
     break;
@@ -1653,7 +1643,7 @@ yyreduce:
   case 19:
 
 /* Line 1806 of yacc.c  */
-#line 178 "config_parser.yy"
+#line 168 "config_parser.yy"
     {
 		m_ExpressionLists.push(boost::make_shared<ExpressionList>());
 	}
@@ -1662,7 +1652,7 @@ yyreduce:
   case 20:
 
 /* Line 1806 of yacc.c  */
-#line 183 "config_parser.yy"
+#line 173 "config_parser.yy"
     {
 		(yyval.variant) = new Variant(m_ExpressionLists.top());
 		m_ExpressionLists.pop();
@@ -1672,7 +1662,7 @@ yyreduce:
   case 26:
 
 /* Line 1806 of yacc.c  */
-#line 198 "config_parser.yy"
+#line 188 "config_parser.yy"
     {
 		Expression expr((yyvsp[(1) - (3)].text), (yyvsp[(2) - (3)].op), *(yyvsp[(3) - (3)].variant), yylloc);
 		free((yyvsp[(1) - (3)].text));
@@ -1685,7 +1675,7 @@ yyreduce:
   case 27:
 
 /* Line 1806 of yacc.c  */
-#line 206 "config_parser.yy"
+#line 196 "config_parser.yy"
     {
 		Expression subexpr((yyvsp[(3) - (6)].text), (yyvsp[(5) - (6)].op), *(yyvsp[(6) - (6)].variant), yylloc);
 		free((yyvsp[(3) - (6)].text));
@@ -1704,7 +1694,7 @@ yyreduce:
   case 28:
 
 /* Line 1806 of yacc.c  */
-#line 220 "config_parser.yy"
+#line 210 "config_parser.yy"
     {
 		Expression expr((yyvsp[(1) - (1)].text), OperatorSet, (yyvsp[(1) - (1)].text), yylloc);
 		free((yyvsp[(1) - (1)].text));
@@ -1716,7 +1706,7 @@ yyreduce:
   case 33:
 
 /* Line 1806 of yacc.c  */
-#line 233 "config_parser.yy"
+#line 223 "config_parser.yy"
     {
 		(yyval.op) = (yyvsp[(1) - (1)].op);
 	}
@@ -1725,7 +1715,7 @@ yyreduce:
   case 34:
 
 /* Line 1806 of yacc.c  */
-#line 239 "config_parser.yy"
+#line 229 "config_parser.yy"
     {
 		(yyval.variant) = new Variant((yyvsp[(1) - (1)].text));
 		free((yyvsp[(1) - (1)].text));
@@ -1735,7 +1725,7 @@ yyreduce:
   case 35:
 
 /* Line 1806 of yacc.c  */
-#line 244 "config_parser.yy"
+#line 234 "config_parser.yy"
     {
 		(yyval.variant) = new Variant((yyvsp[(1) - (1)].num));
 	}
@@ -1744,7 +1734,7 @@ yyreduce:
   case 36:
 
 /* Line 1806 of yacc.c  */
-#line 248 "config_parser.yy"
+#line 238 "config_parser.yy"
     {
 		(yyval.variant) = new Variant();
 	}
@@ -1753,7 +1743,7 @@ yyreduce:
   case 39:
 
 /* Line 1806 of yacc.c  */
-#line 256 "config_parser.yy"
+#line 246 "config_parser.yy"
     {
 		(yyval.variant) = (yyvsp[(1) - (1)].variant);
 	}
@@ -1762,7 +1752,7 @@ yyreduce:
   case 40:
 
 /* Line 1806 of yacc.c  */
-#line 262 "config_parser.yy"
+#line 252 "config_parser.yy"
     {
 		m_Array = boost::make_shared<Dictionary>();
 	}
@@ -1771,7 +1761,7 @@ yyreduce:
   case 41:
 
 /* Line 1806 of yacc.c  */
-#line 267 "config_parser.yy"
+#line 257 "config_parser.yy"
     {
 		(yyval.variant) = new Variant(m_Array);
 		m_Array.reset();
@@ -1781,7 +1771,7 @@ yyreduce:
   case 42:
 
 /* Line 1806 of yacc.c  */
-#line 274 "config_parser.yy"
+#line 264 "config_parser.yy"
     {
 		m_Array->AddUnnamedProperty(*(yyvsp[(1) - (1)].variant));
 		delete (yyvsp[(1) - (1)].variant);
@@ -1791,7 +1781,7 @@ yyreduce:
 
 
 /* Line 1806 of yacc.c  */
-#line 1795 "config_parser.cc"
+#line 1785 "config_parser.cc"
       default: break;
     }
   /* User semantic actions sometimes alter yychar, and that requires
@@ -2029,6 +2019,6 @@ yyreturn:
 
 
 /* Line 2067 of yacc.c  */
-#line 287 "config_parser.yy"
+#line 277 "config_parser.yy"
 
 
diff --git a/dyn/config_parser.yy b/dyn/config_parser.yy
index 4b1934169..12a50847d 100644
--- a/dyn/config_parser.yy
+++ b/dyn/config_parser.yy
@@ -82,7 +82,7 @@ void yyerror(YYLTYPE *locp, ConfigCompiler *context, const char *err)
 int yyparse(ConfigCompiler *context);
 
 static stack<ExpressionList::Ptr> m_ExpressionLists;
-static ConfigItem::Ptr m_Object;
+static ConfigItemBuilder::Ptr m_Item;
 static bool m_Abstract;
 static bool m_Local;
 static Dictionary::Ptr m_Array;
@@ -116,9 +116,9 @@ object:
 	}
 attributes T_OBJECT T_IDENTIFIER T_STRING
 	{
-		m_Object = boost::make_shared<ConfigItem>($4, $5, yylloc);
-		free($4);
-		free($5);
+		m_Item = boost::make_shared<ConfigItemBuilder>(yylloc);
+		m_Item->SetType($4);
+		m_Item->SetName($5);
 	}
 inherits_specifier expressionlist
 	{
@@ -126,22 +126,12 @@ inherits_specifier expressionlist
 		delete $8;
 		ExpressionList::Ptr exprl = dynamic_pointer_cast<ExpressionList>(exprl_object);
 
-		Expression typeexpr("__type", OperatorSet, m_Object->GetType(), yylloc);
-		exprl->AddExpression(typeexpr);
+		m_Item->AddExpressionList(exprl);
+		m_Item->SetLocal(m_Local);
+		m_Item->SetAbstract(m_Abstract);
 
-		Expression nameexpr("__name", OperatorSet, m_Object->GetName(), yylloc);
-		exprl->AddExpression(nameexpr);
-
-		Expression abstractexpr("__abstract", OperatorSet, m_Abstract ? 1 : 0, yylloc);
-		exprl->AddExpression(abstractexpr);
-
-		Expression localexpr("__local", OperatorSet, m_Local ? 1 : 0, yylloc);
-		exprl->AddExpression(localexpr);
-
-		m_Object->SetExpressionList(exprl);
-
-		context->AddObject(m_Object);
-		m_Object.reset();
+		context->AddObject(m_Item->Compile());
+		m_Item.reset();
 	}
 	;
 
@@ -165,7 +155,7 @@ inherits_list: inherits_item
 
 inherits_item: T_STRING
 	{
-		m_Object->AddParent($1);
+		m_Item->AddParent($1);
 		free($1);
 	}
 	;
diff --git a/dyn/configitem.cpp b/dyn/configitem.cpp
index 37e693ea0..faea417ed 100644
--- a/dyn/configitem.cpp
+++ b/dyn/configitem.cpp
@@ -21,8 +21,11 @@
 
 using namespace icinga;
 
-ConfigItem::ConfigItem(const string& type, const string& name, const DebugInfo& debuginfo)
-	: m_Type(type), m_Name(name), m_DebugInfo(debuginfo)
+ConfigItem::ConfigItem(const string& type, const string& name,
+    const ExpressionList::Ptr& exprl, const vector<string>& parents,
+    const DebugInfo& debuginfo)
+	: m_Type(type), m_Name(name), m_ExpressionList(exprl),
+	  m_Parents(parents), m_DebugInfo(debuginfo)
 {
 }
 
@@ -46,21 +49,11 @@ ExpressionList::Ptr ConfigItem::GetExpressionList(void) const
 	return m_ExpressionList;
 }
 
-void ConfigItem::SetExpressionList(const ExpressionList::Ptr& exprl)
-{
-	m_ExpressionList = exprl;
-}
-
 vector<string> ConfigItem::GetParents(void) const
 {
 	return m_Parents;
 }
 
-void ConfigItem::AddParent(const string& parent)
-{
-	m_Parents.push_back(parent);
-}
-
 void ConfigItem::CalculateProperties(Dictionary::Ptr dictionary) const
 {
 	vector<string>::const_iterator it;
diff --git a/dyn/configitem.h b/dyn/configitem.h
index fd93590b8..429367885 100644
--- a/dyn/configitem.h
+++ b/dyn/configitem.h
@@ -32,16 +32,16 @@ public:
 
 	typedef ObjectMap<pair<string, string>, ConfigItem::Ptr> TNMap;
 
-	ConfigItem(const string& type, const string& name, const DebugInfo& debuginfo);
+	ConfigItem(const string& type, const string& name,
+	    const ExpressionList::Ptr& exprl, const vector<string>& parents,
+	    const DebugInfo& debuginfo);
 
 	string GetType(void) const;
 	string GetName(void) const;
 
 	vector<string> GetParents(void) const;
-	void AddParent(const string& parent);
 
 	ExpressionList::Ptr GetExpressionList(void) const;
-	void SetExpressionList(const ExpressionList::Ptr& exprl);
 
 	void CalculateProperties(Dictionary::Ptr dictionary) const;
 
@@ -59,9 +59,10 @@ public:
 private:
 	string m_Type;
 	string m_Name;
-	DebugInfo m_DebugInfo;
-	vector<string> m_Parents;
+
 	ExpressionList::Ptr m_ExpressionList;
+	vector<string> m_Parents;
+	DebugInfo m_DebugInfo;
 
 	ConfigObject::WeakPtr m_ConfigObject;
 
diff --git a/dyn/configitembuilder.cpp b/dyn/configitembuilder.cpp
new file mode 100644
index 000000000..2c5d7446f
--- /dev/null
+++ b/dyn/configitembuilder.cpp
@@ -0,0 +1,86 @@
+#include "i2-dyn.h"
+
+using namespace icinga;
+
+ConfigItemBuilder::ConfigItemBuilder(void)
+	: m_Local(false), m_Abstract(false),
+	  m_ExpressionList(boost::make_shared<ExpressionList>())
+{
+	m_DebugInfo.FirstLine = 0;
+	m_DebugInfo.FirstColumn = 0;
+	m_DebugInfo.LastLine = 0;
+	m_DebugInfo.LastColumn = 0;
+}
+
+ConfigItemBuilder::ConfigItemBuilder(const DebugInfo& debugInfo)
+	: m_Local(false), m_Abstract(false),
+	  m_ExpressionList(boost::make_shared<ExpressionList>())
+{
+	m_DebugInfo = debugInfo;
+}
+
+void ConfigItemBuilder::SetType(const string& type)
+{
+	m_Type = type;
+}
+
+void ConfigItemBuilder::SetName(const string& name)
+{
+	m_Name = name;
+}
+
+void ConfigItemBuilder::SetLocal(bool local)
+{
+	m_Local = local;
+}
+
+void ConfigItemBuilder::SetAbstract(bool abstract)
+{
+	m_Abstract = abstract;
+}
+
+void ConfigItemBuilder::AddParent(const string& parent)
+{
+	m_Parents.push_back(parent);
+}
+
+void ConfigItemBuilder::AddExpression(const Expression& expr)
+{
+	m_ExpressionList->AddExpression(expr);
+}
+
+void ConfigItemBuilder::AddExpression(const string& key, ExpressionOperator op, const Variant& value)
+{
+	Expression expr(key, op, value, m_DebugInfo);
+	AddExpression(expr);
+}
+
+void ConfigItemBuilder::AddExpressionList(const ExpressionList::Ptr& exprl)
+{
+	AddExpression("", OperatorExecute, exprl);
+}
+
+ConfigItem::Ptr ConfigItemBuilder::Compile(void)
+{
+	assert(!m_Type.empty());
+	assert(!m_Name.empty());
+
+	ExpressionList::Ptr exprl = boost::make_shared<ExpressionList>();
+
+	Expression execExpr("", OperatorExecute, m_ExpressionList, m_DebugInfo);
+	exprl->AddExpression(execExpr);
+
+	Expression typeExpr("__type", OperatorSet, m_Type, m_DebugInfo);
+	exprl->AddExpression(typeExpr);
+
+	Expression nameExpr("__name", OperatorSet, m_Name, m_DebugInfo);
+	exprl->AddExpression(nameExpr);
+
+	Expression localExpr("__local", OperatorSet, m_Local, m_DebugInfo);
+	exprl->AddExpression(localExpr);
+
+	Expression abstractExpr("__abstract", OperatorSet, m_Abstract, m_DebugInfo);
+	exprl->AddExpression(abstractExpr);
+
+	return boost::make_shared<ConfigItem>(m_Type, m_Name, exprl, m_Parents, m_DebugInfo);
+}
diff --git a/dyn/configitembuilder.h b/dyn/configitembuilder.h
new file mode 100644
index 000000000..1a2b09e75
--- /dev/null
+++ b/dyn/configitembuilder.h
@@ -0,0 +1,41 @@
+#ifndef CONFIGITEMBUILDER_H
+#define CONFIGITEMBUILDER_H
+
+namespace icinga
+{
+
+class ConfigItemBuilder : public Object
+{
+public:
+	typedef shared_ptr<ConfigItemBuilder> Ptr;
+	typedef weak_ptr<ConfigItemBuilder> WeakPtr;
+
+	ConfigItemBuilder(void);
+	ConfigItemBuilder(const DebugInfo& debugInfo);
+
+	void SetType(const string& type);
+	void SetName(const string& name);
+	void SetLocal(bool local);
+	void SetAbstract(bool abstract);
+
+	void AddParent(const string& parent);
+
+	void AddExpression(const Expression& expr);
+	void AddExpression(const string& key, ExpressionOperator op, const Variant& value);
+	void AddExpressionList(const ExpressionList::Ptr& exprl);
+
+	ConfigItem::Ptr Compile(void);
+
+private:
+	string m_Type;
+	string m_Name;
+	bool m_Local;
+	bool m_Abstract;
+	vector<string> m_Parents;
+	ExpressionList::Ptr m_ExpressionList;
+	DebugInfo m_DebugInfo;
+};
+
+}
+
+#endif /* CONFIGITEMBUILDER */
diff --git a/dyn/debuginfo.h b/dyn/debuginfo.h
index 83550761d..a49661184 100644
--- a/dyn/debuginfo.h
+++ b/dyn/debuginfo.h
@@ -39,14 +39,14 @@ struct DebugInfo
 
 	union
 	{
-		int LastColumn;
-		int last_column;
+		int LastLine;
+		int last_line;
 	};
 
 	union
 	{
-		int LastLine;
-		int last_line;
+		int LastColumn;
+		int last_column;
 	};
 };
 
diff --git a/dyn/expression.cpp b/dyn/expression.cpp
index 0096aa4e2..d6740bd77 100644
--- a/dyn/expression.cpp
+++ b/dyn/expression.cpp
@@ -42,6 +42,14 @@ void Expression::Execute(const Dictionary::Ptr& dictionary) const
 	Dictionary::Ptr dict;
 
 	switch (m_Operator) {
+		case OperatorExecute:
+			if (!valueExprl)
+				throw invalid_argument("Operand for OperatorExecute must be an ExpressionList.");
+
+			valueExprl->Execute(dictionary);
+
+			return;
+
 		case OperatorSet:
 			if (valueExprl) {
 				dict = boost::make_shared<Dictionary>();
@@ -85,9 +93,7 @@ void Expression::Execute(const Dictionary::Ptr& dictionary) const
 			break;
 
 		default:
-			assert(!"Not yet implemented.");
-
-			break;
+			throw runtime_error("Not yet implemented.");
 	}
 
 	dictionary->SetProperty(m_Key, newValue);
diff --git a/dyn/expression.h b/dyn/expression.h
index 4b70a65fb..5ef8b5c32 100644
--- a/dyn/expression.h
+++ b/dyn/expression.h
@@ -25,6 +25,7 @@ namespace icinga
 
 enum ExpressionOperator
 {
+	OperatorExecute,
 	OperatorSet,
 	OperatorPlus,
 	OperatorMinus,
diff --git a/dyn/i2-dyn.h b/dyn/i2-dyn.h
index 29a201d36..b504ff841 100644
--- a/dyn/i2-dyn.h
+++ b/dyn/i2-dyn.h
@@ -48,6 +48,7 @@ using std::endl;
 #include "expression.h"
 #include "expressionlist.h"
 #include "configitem.h"
+#include "configitembuilder.h"
 #include "configcompiler.h"
 
 #endif /* I2DYN_H */
diff --git a/icinga-app/Makefile.am b/icinga-app/Makefile.am
index 39ea3a41b..9ee0e406e 100644
--- a/icinga-app/Makefile.am
+++ b/icinga-app/Makefile.am
@@ -11,6 +11,7 @@ icinga_CPPFLAGS = \
 	-DI2_ICINGALAUNCHER_BUILD \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/icinga \
 	-I${top_srcdir}
@@ -22,6 +23,7 @@ icinga_LDADD = \
 	$(BOOST_SIGNALS_LIB) \
 	$(BOOST_THREAD_LIB) \
 	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
 	${top_builddir}/icinga/libicinga.la \
 	-dlopen ${top_builddir}/components/checker/checker.la \
 	-dlopen ${top_builddir}/components/cibsync/cibsync.la \
diff --git a/icinga/Makefile.am b/icinga/Makefile.am
index 52405e656..744f80825 100644
--- a/icinga/Makefile.am
+++ b/icinga/Makefile.am
@@ -21,6 +21,7 @@ libicinga_la_CPPFLAGS = \
 	-DI2_ICINGA_BUILD \
 	$(BOOST_CPPFLAGS) \
 	-I${top_srcdir}/base \
+	-I${top_srcdir}/dyn \
 	-I${top_srcdir}/jsonrpc \
 	-I${top_srcdir}/cJSON \
 	-I${top_srcdir}
@@ -33,5 +34,6 @@ libicinga_la_LDFLAGS = \
 
 libicinga_la_LIBADD = \
 	$(BOOST_THREAD_LIB) \
-	${top_builddir}/jsonrpc/libjsonrpc.la \
-	${top_builddir}/base/libbase.la
+	${top_builddir}/base/libbase.la \
+	${top_builddir}/dyn/libdyn.la \
+	${top_builddir}/jsonrpc/libjsonrpc.la
diff --git a/icinga/i2-icinga.h b/icinga/i2-icinga.h
index a9284165b..70f7aef04 100644
--- a/icinga/i2-icinga.h
+++ b/icinga/i2-icinga.h
@@ -28,6 +28,8 @@
  */
 
 #include <i2-base.h>
+#include <i2-dyn.h>
+#include <i2-dyn.h>
 #include <i2-jsonrpc.h>
 #include <set>
 
diff --git a/icinga/icingaapplication.cpp b/icinga/icingaapplication.cpp
index 562ea9529..52af54afb 100644
--- a/icinga/icingaapplication.cpp
+++ b/icinga/icingaapplication.cpp
@@ -62,15 +62,19 @@ int IcingaApplication::Main(const vector<string>& args)
 	componentObjects->Start();
 
 	/* load convenience config component */
-	ConfigObject::Ptr convenienceComponentConfig = boost::make_shared<ConfigObject>("component", "convenience");
+	ConfigItemBuilder::Ptr convenienceComponentConfig = boost::make_shared<ConfigItemBuilder>();
+	convenienceComponentConfig->SetType("component");
+	convenienceComponentConfig->SetName("convenience");
 	convenienceComponentConfig->SetLocal(true);
-	convenienceComponentConfig->Commit();
+	convenienceComponentConfig->Compile()->Commit();
 
 	/* load config file */
-	ConfigObject::Ptr fileComponentConfig = boost::make_shared<ConfigObject>("component", "configfile");
+	ConfigItemBuilder::Ptr fileComponentConfig = boost::make_shared<ConfigItemBuilder>();
+	fileComponentConfig->SetType("component");
+	fileComponentConfig->SetName("configfile");
 	fileComponentConfig->SetLocal(true);
-	fileComponentConfig->SetProperty("configFilename", args[1]);
-	fileComponentConfig->Commit();
+	fileComponentConfig->AddExpression("configFilename", OperatorSet, args[1]);
+	fileComponentConfig->Compile()->Commit();
 
 	ConfigObject::Ptr icingaConfig = ConfigObject::GetObject("application", "icinga");