diff --git a/README.md b/README.md
new file mode 100644
index 0000000..528cbc5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,26 @@
+
+
+# Type Definition Prototype
+
+{
+    name: "string",
+    render: function(v){ return v; }
+    editor: function(){
+        // return a sky.editor
+    }
+}
+
+# Object Descriptor
+
+{
+
+    fields: [
+        { name: "abc", type: null, label: "Feld ABC" },
+        { name: "def", type: "int", label: "Feld DEF" }
+    ],
+
+}
+
+
+
+
diff --git a/frame.html b/frame.html
index 8d98648..707640e 100644
--- a/frame.html
+++ b/frame.html
@@ -5,14 +5,15 @@
     <title>Sky.JS</title>
         
     <link href="style.css" rel="stylesheet" />
+    <link href="sky.base.css" rel="stylesheet" />
     <link href="sky.tables.css" rel="stylesheet" />
 
     <script type="text/javascript" src="jquery.min.js"></script>
     <script type="text/javascript" src="sky.base.js"></script>
-    <script type="text/javascript" src="sky.tables.js"></script>
-    <script type="text/javascript" src="sky.controls.js"></script>
+    <script type="text/javascript" src="sky.types.js"></script>
     <script type="text/javascript" src="sky.form.js"></script>
-    <script type="text/javascript" src="sky.dhcp.js"></script>
+
+    <script type="text/javascript" src="sky.tables.js"></script>
 </head>
 <body>
     <script type="text/javascript">
@@ -27,6 +28,9 @@
             </div>
         <div id="page">
             <div id="content">
+                <h1>Types</h1>
+                <div id="Types"></div>
+
                 <h1>Table Demo</h1>
                 <table id="tableDemo" style="width: 95%;"></table>
             </div>
@@ -41,6 +45,15 @@
     </div>
     
 <script type="text/javascript">
+    var demoDescriptor = {
+        fields: [
+            { name: "Name", type: null },
+            { name: "Age", type: "int", label: "Alter" },
+            { name: "Comment", type: null, label: "Anmerkungen" },
+            { name: "IP", type: "ipv4" },
+        ]
+    }
+
     var demoObjects = [
         {
             Name: "First Demo Item",
@@ -62,15 +75,23 @@
         },
     ];
 
+    SKY
+    .form(demoDescriptor, demoObjects[0])
+    .appendTo( $("#Types"));
+
 
     $("#tableDemo").skyTable( {
         rows: demoObjects,
+        select: "multi",
         columns: [
             { key: "Name", label: "Name", type: "string" },
             { key: "Age", label: "Alter", type: "int" },
             { key: "Comment", label: "Bemerkungen", type: "string" },
             { key: "IP", label: "IP", type: "IPv4" },
         ],
+    })
+    .on("dblclick", function(e){
+    	alert("Editor may open for " + JSON.stringify(e.row));
     });
 
 
diff --git a/sky.base.css b/sky.base.css
new file mode 100644
index 0000000..30942fb
--- /dev/null
+++ b/sky.base.css
@@ -0,0 +1,24 @@
+
+
+input.changed {
+    background-color: #9cdaf5;
+}
+
+input:invalid {
+    border-color: red;
+    background-color: #E0C0C0;
+}
+
+fieldset {
+    display: inline-grid;
+    grid-template-columns: auto auto;
+}
+
+fieldset > * {
+    align-self: center;
+    
+    margin-left: 6px;
+    margin-right: 6px;
+    margin-top: 4px;
+    margin-bottom: 2px;
+}
\ No newline at end of file
diff --git a/sky.base.js b/sky.base.js
index e402b09..3143e7d 100644
--- a/sky.base.js
+++ b/sky.base.js
@@ -12,13 +12,36 @@
         var refreshList = [];
         var refreshCounter = 0;
 
-        function SkyAPI(){
-            this.JQuery = {};
+        class SKYBase
+        {
+            on( evName, h ){
+                if (!self[evName])
+                    self[evName] = [];
+                self[evName].push(h);
 
+                return this;
+            }
+            off( evName ){
+                self[evName] = []
+
+                return this;
+            }
+            fire( evName, p ){
+                if (self[evName])
+                    self[evName].forEach( function(h){ h(p); } );
+
+                return this;
+            }
+
+        }
+
+        function SkyAPI(){
             this.options = function(o){
                 options = Object.assign(options, o);
             }
 
+
+            /* Refresh API */
             this.refresh = function( name, interval, f){
                 if (!interval)
                 {
@@ -84,6 +107,37 @@
                 return this;
             }
 
+            /* Types API */
+            var types = {}
+            var defaultType = null;
+
+            this.type = function(name,type){
+                switch (arguments.length){
+                    case 0:
+                        return types;
+                    case 1:
+                        if ((name == null) || (!types[name]))
+                            return defaultType;
+                        return types[name];
+                    case 2:
+                        if (type)
+                            if (name != null)
+                                types[name] = type;
+                            else
+                                defaultType = type;
+                        else
+                            if (name != null)
+                                delete types[name];
+                }
+            }
+            
+
+
+            /* Final construction */
+            this.fn = {};
+            this.prototypes = {}
+            this.prototypes.SKYBase = SKYBase;
+
             this.interval( 100 );
 
             return this;
diff --git a/sky.controls.js b/sky.controls.js
index 23b96ba..485fdda 100644
--- a/sky.controls.js
+++ b/sky.controls.js
@@ -1,6 +1,74 @@
-﻿
-(function($){
+﻿(function(SKY){
 
+	class SKYControl extends SKY.prototypes.SKYBase {
+		constructor(typeName){
+			super();
+			this.typeName = typeName;
+			
+		}
+
+		getIdentity(o){
+			return null;
+		}
+		render(o){
+			return o.toString();
+		}
+		editor(){
+			return null;
+		}
+		createSelector(){
+			return this.createEditor();
+		}
+	}
+
+	SKY.prototypes.SKYControl = SKYControl;
+
+}(SKY));
+
+(function(SKY){
+
+	class StringEditor extends SKY.prototypes.SKYEditor{
+		constructor(){
+			this.html(
+				$("<input>")
+					.attr("type","text")
+					.data("sky-editor", this)
+					.addClass("skyeditor skyeditor-string")
+					.on("change", function(e){
+						$(this).data("sky-editor").changed(true);
+					})
+				);
+		}
+		value(val){
+			if (arguments.length)
+			{
+				this.html().val( val );
+				this.changed(false);
+				return this;
+			}
+			return this.html().val();
+		}
+
+
+	}
+
+	class StringType extends SKY.prototypes.SKYControl {
+		constructor(){
+			super("string")
+		}
+
+		createEditor(){
+			return new StringEditor();
+		}
+
+	}
+
+	new StringType();
+
+}(SKY));
+
+
+(function($){
 	$.extend($, { sky: {} } );
 	$.extend($.sky, { controls: {} });
 
diff --git a/sky.dhcp.js b/sky.dhcp.js
old mode 100755
new mode 100644
diff --git a/sky.form.js b/sky.form.js
index 0d25cee..5ae94e7 100644
--- a/sky.form.js
+++ b/sky.form.js
@@ -1,4 +1,52 @@
-﻿
+﻿(function(SKY){
+
+	SKY.form = function(descriptor, o){
+
+		return new function(){
+			this.appendTo = function(parent){ this.fieldset.appendTo(parent); return this; }
+
+			this.assign = function(o){
+				for (var n in this.descriptor.fields)
+				{
+					var fieldDesc = this.descriptor.fields[n];
+					var editor = this.editors[fieldDesc.name];
+					if (editor)
+					{
+						editor.value( o[fieldDesc.name] );
+					}
+				}
+				return this;
+			}
+
+			this.descriptor = descriptor;
+			this.editors = {}
+			this.fieldset = $("<fieldset></fieldset>");
+
+			for (var n in descriptor.fields){
+				var fieldDesc = descriptor.fields[n];
+				var skyType = SKY.type(fieldDesc.type);
+				var label = $("<label></label>");
+				var editor = skyType.editor();
+
+				label
+				.text( fieldDesc.label ? fieldDesc.label : fieldDesc.name )
+				.appendTo(this.fieldset);
+				
+				editor
+				.id( fieldDesc.name )
+				.html().appendTo(this.fieldset);
+
+				this.editors[fieldDesc.name] = editor;
+			}
+
+			if (o)
+				this.assign(o);
+		};
+
+	}
+
+}(SKY));
+
 (function($){
 	function log(o){
 		console.log(o);
diff --git a/sky.tables.js b/sky.tables.js
index 7991278..827f08b 100644
--- a/sky.tables.js
+++ b/sky.tables.js
@@ -6,8 +6,147 @@
 			columns: [],
 			pagification: {
 				rows: 25,
-			}
+			},
+			select: null,
 		};
+	var defaultColumn = {
+			type: "string",
+
+		};
+
+	class HTML {
+		constructor(skyTable, table){
+			this.skyTable = skyTable;
+			this.table = table;
+			this.head = $("<thead></thead>").appendTo(table);
+			this.body = $("<tbody></tbody>").appendTo(table);
+			this.footer = $("<tfooter></tfooter>").appendTo(table);
+
+			this.rowCache = [];
+			this.usedRows = {};
+		}
+		createRow(){
+			var self = this;
+			var row = $("<tr></tr>")
+				.addClass("skytable skytable-row")
+				.on("click", function(){
+					self.skyTable.fireRowClick($(this));
+				})
+				.on("dblclick", function(){
+					self.skyTable.fireRowDblClick($(this));
+				});
+
+			for (var n=0;n<this.skyTable.columns.length;n++){
+				$("<td></td>")
+					.addClass("skytable skytable-cell")
+					.appendTo(row);
+			}
+			return row.get(0);
+		}
+		attachDataRow(iRow){
+			if (this.rowCache.length == 0)
+				this.rowCache.push(this.createRow());
+
+			var row = this.skyTable.data.rows[iRow];
+			var htmlRow = $(this.rowCache.pop());
+
+			htmlRow.data( "data-row", row );
+			htmlRow.data( "data-row-index", iRow );
+
+			var cells = $("td", htmlRow);
+
+			for (var n=0;n<this.skyTable.columns.length;n++){
+				$(cells[n])
+					.text( this.skyTable.columns[n].type.render( row[this.skyTable.columns[n].key] ) );
+			}
+			htmlRow.appendTo(this.body);
+			this.usedRows[iRow] = htmlRow;
+		}
+		detachDataRow(iRow){
+			if (this.usedRows[iRow])
+			{
+				$(this.usedRows[iRow]).detach();
+				this.rowCache.push(this.usedRows[iRow]);
+			}
+		}
+		get(iRow){
+			return this.usedRows[iRow];
+		}
+
+		empty(){
+			for (var iRow in this.usedRows){
+				var htmlRow = me.html.usedRows[iRow];
+				$(htmlRow).detach();
+				this.rowCache.push(htmlRow);
+			}
+			this.usedRows = {};
+		}
+
+		initializeHeader(){
+			this.columnHeader = $("<tr></tr>")
+				.addClass("skytable skytable-head")
+				.appendTo(this.head);
+
+			for (var n=0;n<this.skyTable.columns.length;n++){
+				$("<td></td>")
+					.text(this.skyTable.columns[n].label)
+					.addClass("skytable skytable-head")
+					.appendTo(this.columnHeader);
+			}
+		}
+	}
+	class DATA {
+		constructor(skyTable){
+			this.skyTable = skyTable;
+			this.rows= skyTable.options.rows;
+			this.firstrow = 0;
+			this.selectedRows = [];
+		}
+		getLastRow(){
+			var lastRow = this.firstrow + this.skyTable.options.pagification.rows;
+			if (lastRow > this.rows.length)
+				lastRow = this.rows.length;
+			return lastRow;
+		}
+		deselect(iRow){
+			var si = this.selectedRows.indexOf(iRow);
+			if (si != -1)
+			{
+				this.selectedRows.splice(si,1);
+				var htmlRow = this.skyTable.html.get(iRow);
+				if (htmlRow)
+					$(htmlRow).removeClass("selected");
+				this.skyTable.fire("deselect", { index: iRow, row: this.rows[iRow] } );
+			}
+		}
+		select(iRow){
+			if (!this.selectedRows.includes(iRow)){
+				this.selectedRows.push(iRow);
+				var htmlRow = this.skyTable.html.get(iRow);
+				if (htmlRow)
+					$(htmlRow).addClass("selected");
+
+				this.skyTable.fire("select", { index: iRow, row: this.rows[iRow] } );
+			}
+		}
+		toggleSelect(iRow){
+			if (this.skyTable.options.select == "single")
+			{
+				var doSelection = (!this.selectedRows.includes(iRow));
+				while (this.selectedRows.length)
+					this.deselect(this.selectedRows[0]);
+				if (doSelection)
+					this.select(iRow);
+			} else if (this.skyTable.options.select == "multi")
+			{
+				if (!this.selectedRows.includes(iRow))
+					this.select(iRow);
+				else
+					this.deselect(iRow);
+			}
+		}
+	}
+
 
 	$.fn.skyTable = function(opt){
 		if (this.length != 1)
@@ -27,116 +166,63 @@
 			return skyTable;
 		}
 
-		var options = Object.assign( {}, defaultOptions, opt );
+		class SkyTable extends SKY.prototypes.SKYBase{
 
-		function SkyTable(t){
-			var me = this;
+			constructor(t){
+				super();
+				var me = this;
 
-			t = $(t);
-			t	.data( "sky.skyTable", me)
-				.addClass("skytable");
+				this.options = Object.assign( {}, defaultOptions, opt );
+				this.columns = []
 
-			me.html = {
-				table: t,
-				head: $("<thead></thead>").appendTo(t),
-				body: $("<tbody></tbody>").appendTo(t),
-				footer: $("<tfooter></tfooter>").appendTo(t),
+				t = $(t);
+				t	.data( "sky.skyTable", this)
+					.addClass("skytable");
 
-				rowCache: [],
-				usedRows: [],
+				this.html = new HTML(this, t);
+				this.data = new DATA(this);
 
-				createRow: function(){
-					var row = $("<tr></tr>")
-						.addClass("skytable skytable-row")
-						.on("click", function(){
-							$(this).toggleClass("selected");
-						});
+				for (var key in this.options.columns){
+					var column = this.options.columns[key];
+					var skyColumn = Object.assign( {}, defaultColumn, column );
+					skyColumn.type = SKY.controls.getControl(skyColumn.type);
+					this.columns.push( skyColumn );
+				}
 
-					for (var n=0;n<options.columns.length;n++){
-						$("<td></td>")
-							.addClass("skytable skytable-cell")
-							.appendTo(row);
-					}
-					return row;
-				},
+				this.html.initializeHeader();
+				this.refresh();
+			}
 
-				attachDataRow: function(dri){
-					if (me.html.rowCache.length == 0)
-						me.html.rowCache.push(me.html.createRow());
-
-					var drow = me.data.rows[dri];
-					var htmlRow = $(me.html.rowCache.pop());
-					htmlRow.data( "data-row", drow );
-					htmlRow.data( "data-row-index", dri );
-
-					var cells = $("td", htmlRow);
-
-					for (var n=0;n<options.columns.length;n++){
-						$(cells[n])
-							.text(drow[options.columns[n].key]);
-					}
-					htmlRow.appendTo(me.html.body);
-				},
-
-				initializeHeader: function(){
-					me.html.columnHeader = $("<tr></tr>")
-						.addClass("skytable skytable-head")
-						.appendTo(me.html.head);
-
-					for (var n=0;n<options.columns.length;n++){
-						$("<td></td>")
-						.text(options.columns[n].label)
-						.addClass("skytable skytable-head")
-						.appendTo(me.html.columnHeader);
-					}
-				},
-
-				empty: function(){
-					me.html.usedRows.forEach( function(htmlRow){
-						$(htmlRow).detach();
-						rowCache.push(htmlRow);
-					});
-				},
-
-			};
-
-			me.data = {
-				rows: options.rows,
-				firstrow: 0,
-
-
-				getLastRow: function(){
-					var lastRow = me.data.firstrow + options.pagification.rows;
-					if (lastRow > me.data.rows.length)
-						lastRow = me.data.rows.length;
-					return lastRow;
-				},
-
-			};
-
-			me.reset = function(){
+			reset(){
 				me.html.empty();
 			}
 
-			me.rows = function(rows){
+			rows(rows){
 				if (arguments.length == 0)
 					return me.currentRows;
 
-				me.empty();
+				me.reset();
 			}
 
-			me.refresh = function(){
-				me.html.empty();
+			refresh(){
+				this.html.empty();
 
-				var lastRow = me.data.getLastRow();
-				for (var n = me.data.firstrow;n < lastRow; n++){
-					me.html.attachDataRow( n );
+				var lastRow = this.data.getLastRow();
+				for (var n = this.data.firstrow;n < lastRow; n++){
+					this.html.attachDataRow( n );
 				}
-
+				return this;
+			}
+			
+			fireRowClick(row){
+				if (this.options.select)
+					this.data.toggleSelect( row.data("data-row-index") );
+				else
+					this.fire( "click", { index: row.data("data-row-index") , row: row.data("data-row") });
+			}
+			fireRowDblClick(row){
+				this.fire( "dblclick", { index: row.data("data-row-index") , row: row.data("data-row") });	
 			}
-
-			me.html.initializeHeader();
-			me.refresh();
 		}
 
 		return new SkyTable(self);
diff --git a/sky.types.js b/sky.types.js
new file mode 100644
index 0000000..15d2565
--- /dev/null
+++ b/sky.types.js
@@ -0,0 +1,119 @@
+(function(SKY){
+
+	class SKYEditor{
+		constructor(placeholder,pattern){
+            this.html($('<input type="text">'));
+            if (pattern)
+                this._html.attr("pattern", pattern);
+            if (placeholder)
+                this._html.attr("placeholder", placeholder);
+
+            this._html.on("input", ()=>this.changed( this._html.data("value") != this._html.val() ) );
+            this._html.data("value", null);
+		}
+
+		html(html){
+			if (arguments.length == 1)
+			{
+				this._html = $(html);
+				return this;
+			}
+			return this._html;
+		}
+
+        id(id){
+            this.html().attr("id", id);
+            return this;
+        }
+
+		value(value){
+			if (arguments.length)
+			{
+                this._html
+                .val(value)
+                .data("value", value);
+                return this;
+			}
+			return this._html.val();
+		}
+		changed(changed){
+			if (arguments.length)
+			{
+				this._changed = (changed) ? true : false;
+				if (this._changed)
+					this.html().addClass("changed");
+				else
+					this.html().removeClass("changed");
+				return this;
+			}
+			return this._changed;
+        }
+        valid(){
+            return this._html[0].checkValidity();
+        }
+
+    }
+    SKY.prototypes.SKYEditor = SKYEditor;
+
+    class SKYIntEditor extends SKYEditor {
+		constructor(){
+            super();
+            this._html.attr("type","number");    
+		}
+    }
+    
+    class SKYIPv4Editor extends SKYEditor {
+        constructor(){
+            super("ipv4");
+            this.html()
+            .attr("placeholder", "000.000.000.000")
+            .attr("pattern", "^[0-9]([0-9]){0,2}\.[0-9]([0-9]){0,2}\.[0-9]([0-9]){0,2}\.[0-9]([0-9]){0,2}");
+        }
+    }
+
+
+
+
+
+    class SKYType  {
+		constructor(name){
+            SKY.type(name,Object.getPrototypeOf(this));
+		}
+
+		editor(){
+			return new SKYEditor();
+        }
+        
+        render(value){
+            return value;
+        }
+    }
+    
+    class SKYIntType extends SKYType
+    {
+        constructor(){
+            super("int");
+        }
+
+        editor(){
+            return new SKYIntEditor();
+        }
+    }
+
+    class SKYIPv4Type extends SKYType
+    {
+        constructor(){
+            super("ipv4");
+        }
+
+        editor(){
+            return new SKYEditor("000.000.000.000","^[0-9]([0-9]){0,2}\.[0-9]([0-9]){0,2}\.[0-9]([0-9]){0,2}\.[0-9]([0-9]){0,2}");
+        }
+
+    }
+
+
+    new SKYType(null);
+    new SKYIntType();
+    new SKYIPv4Type();
+}(SKY));
\ No newline at end of file
diff --git a/style.css b/style.css
index 03e26d4..b550fd8 100644
--- a/style.css
+++ b/style.css
@@ -21,7 +21,6 @@ div#body {
 }
 
 
-
 /*!
 div {
     margin: 0px;
@@ -254,19 +253,7 @@ button {
 }
 
 
-fieldset {
-    display: inline-grid;
-    grid-template-columns: auto auto;
-}
 
-fieldset > * {
-    align-self: center;
-    
-    margin-left: 6px;
-    margin-right: 6px;
-    margin-top: 4px;
-    margin-bottom: 2px;
-}
 
 
 .popup {
