diff --git a/doc/devel/UML/builder.violet b/doc/devel/UML/builder.violet
index 7144907..535aca1 100644
--- a/doc/devel/UML/builder.violet
+++ b/doc/devel/UML/builder.violet
@@ -18,8 +18,8 @@ Filesystem</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>239.65022612023944</double> 
-     <double>428.68019298068566</double> 
+     <double>238.23601255786633</double> 
+     <double>493.73401684984844</double> 
     </void> 
    </object> 
   </void> 
@@ -33,8 +33,8 @@ Filesystem</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>115.78546881025578</double> 
-     <double>581.4909858656838</double> 
+     <double>115.78546881025575</double> 
+     <double>635.2311012358618</double> 
     </void> 
    </object> 
   </void> 
@@ -48,8 +48,8 @@ Filesystem</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>377.65022612023944</double> 
-     <double>579.6801929806866</double> 
+     <double>376.23601255786633</double> 
+     <double>644.7340168498495</double> 
     </void> 
    </object> 
   </void> 
@@ -60,7 +60,8 @@ Filesystem</string>
       <string>lstat()
 read()
 close()
-open()</string> 
+open()
+readdir()</string> 
      </void> 
     </void> 
     <void property="name"> 
@@ -72,8 +73,8 @@ SourceFile</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>482.9740126701578</double> 
-     <double>408.11257163567745</double> 
+     <double>481.55979910778467</double> 
+     <double>464.84194569982117</double> 
     </void> 
    </object> 
   </void> 
@@ -87,8 +88,8 @@ SourceFile</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>269.92071150027203</double> 
-     <double>579.4370214406978</double> 
+     <double>268.5064979378989</double> 
+     <double>644.4908453098606</double> 
     </void> 
    </object> 
   </void> 
@@ -111,8 +112,8 @@ Stream</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>781.3090745567881</double> 
-     <double>275.3064215363851</double> 
+     <double>779.894860994415</double> 
+     <double>340.36024540554786</double> 
     </void> 
    </object> 
   </void> 
@@ -126,8 +127,8 @@ Stream</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>919.2570998971042</double> 
-     <double>440.60621052176435</double> 
+     <double>907.9433913981195</double> 
+     <double>505.6600343909271</double> 
     </void> 
    </object> 
   </void> 
@@ -141,8 +142,8 @@ Stream</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>650.496291906489</double> 
-     <double>438.22779629175875</double> 
+     <double>646.2536512193697</double> 
+     <double>514.5953286599063</double> 
     </void> 
    </object> 
   </void> 
@@ -156,8 +157,8 @@ Stream</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>771.7954176367664</double> 
-     <double>441.79541763676707</double> 
+     <double>774.6238447615127</double> 
+     <double>513.9203093177954</double> 
     </void> 
    </object> 
   </void> 
@@ -179,8 +180,8 @@ TreeNodeBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>470.92601754107767</double> 
-     <double>54.86674707528562</double> 
+     <double>469.51180397870456</double> 
+     <double>119.92057094444797</double> 
     </void> 
    </object> 
   </void> 
@@ -194,8 +195,8 @@ TreeNodeBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>778.9306603267822</double> 
-     <double>72.70485380032646</double> 
+     <double>777.5164467644091</double> 
+     <double>137.7586776694888</double> 
     </void> 
    </object> 
   </void> 
@@ -209,8 +210,8 @@ TreeNodeBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>777.7414532117795</double> 
-     <double>170.0566174453891</double> 
+     <double>776.3272396494064</double> 
+     <double>235.11044131455145</double> 
     </void> 
    </object> 
   </void> 
@@ -224,8 +225,8 @@ TreeNodeBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>902.6082002870654</double> 
-     <double>168.86741033038638</double> 
+     <double>899.7797731623193</double> 
+     <double>242.40651557378732</double> 
     </void> 
    </object> 
   </void> 
@@ -239,8 +240,8 @@ TreeNodeBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>660.0099488265103</double> 
-     <double>172.43503167539455</double> 
+     <double>658.5957352641371</double> 
+     <double>237.4888555445569</double> 
     </void> 
    </object> 
   </void> 
@@ -255,8 +256,8 @@ FileBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>70.16321978516044</double> 
-     <double>171.2458245603918</double> 
+     <double>68.74900622278733</double> 
+     <double>236.29964842955417</double> 
     </void> 
    </object> 
   </void> 
@@ -271,8 +272,8 @@ DirBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>191.46234551543796</double> 
-     <double>171.24582456039184</double> 
+     <double>190.04813195306485</double> 
+     <double>236.2996484295542</double> 
     </void> 
    </object> 
   </void> 
@@ -287,8 +288,159 @@ SymlinkBuilder</string>
    </object> 
    <object class="java.awt.geom.Point2D$Double"> 
     <void method="setLocation"> 
-     <double>305.62622855569924</double> 
-     <double>171.2458245603918</double> 
+     <double>304.21201499332614</double> 
+     <double>236.29964842955417</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="NoteNode0" class="com.horstmann.violet.NoteNode"> 
+    <void property="text"> 
+     <void property="text"> 
+      <string>POSIX inspired interface to files on different filesystems.
+open/close act as a opendir/closedir if the file is a dir,
+I think we don&apos;t need different function to open a dir.</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>154.8805850420814</double> 
+     <double>333.9382491299707</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="NoteNode1" class="com.horstmann.violet.NoteNode"> 
+    <void property="text"> 
+     <void property="text"> 
+      <string>&quot;Sources&quot; for file contents</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>587.0127806828101</double> 
+     <double>358.755499461917</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="ClassNode10" class="com.horstmann.violet.ClassNode"> 
+    <void property="name"> 
+     <void property="text"> 
+      <string>CutOutStream</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>845.6997102991108</double> 
+     <double>605.2834046956852</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="ClassNode11" class="com.horstmann.violet.ClassNode"> 
+    <void property="name"> 
+     <void property="text"> 
+      <string>FilterStream</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>721.2489168102784</double> 
+     <double>605.2834046956852</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="InterfaceNode7" class="com.horstmann.violet.InterfaceNode"> 
+    <void property="name"> 
+     <void property="text"> 
+      <string>«interface»
+Filter</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>715.5920625607861</double> 
+     <double>705.6925676241749</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="NoteNode2" class="com.horstmann.violet.NoteNode"> 
+    <void property="text"> 
+     <void property="text"> 
+      <string>Used for arbitray streams, not related to
+filesystem high-level idea. Also used for 
+files like fifos, that can&apos;t be added directly as
+regulat files via de Builder, because its size is
+unknown. The need to be added as new_files
+on image</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>906.5108934811542</double> 
+     <double>328.0975464705584</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="NoteNode3" class="com.horstmann.violet.NoteNode"> 
+    <void property="text"> 
+     <void property="text"> 
+      <string>Create the user-specified TreeNode from the
+user-specified source. If the source type differs the
+TreeNode type the use wants to create, it makes
+the needed conversion, if possible. Each builder 
+implementation can do different conversions.</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>654.7808793787427</double> 
+     <double>20.610173055266337</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="NoteNode4" class="com.horstmann.violet.NoteNode"> 
+    <void property="text"> 
+     <void property="text"> 
+      <string>Together with the SourceFile encapsulates the
+access to a given filesystem and abstracts it to
+a POSIX interface.</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>20.610173055266422</double> 
+     <double>403.050865276332</double> 
+    </void> 
+   </object> 
+  </void> 
+  <void method="addNode"> 
+   <object id="NoteNode5" class="com.horstmann.violet.NoteNode"> 
+    <void property="text"> 
+     <void property="text"> 
+      <string>The TreeNodeBuilder can be created with
+the combination of different interfaces for 
+each factory method</string> 
+     </void> 
+    </void> 
+   </object> 
+   <object class="java.awt.geom.Point2D$Double"> 
+    <void method="setLocation"> 
+     <double>149.90663761154804</double> 
+     <double>57.982756057296896</double> 
     </void> 
    </object> 
   </void> 
@@ -304,21 +456,6 @@ SymlinkBuilder</string>
    <object idref="InterfaceNode0"/> 
    <object idref="InterfaceNode1"/> 
   </void> 
-  <void method="connect"> 
-   <object class="com.horstmann.violet.ClassRelationshipEdge"> 
-    <void property="bentStyle"> 
-     <object class="com.horstmann.violet.BentStyle" field="VHV"/> 
-    </void> 
-    <void property="endArrowHead"> 
-     <object class="com.horstmann.violet.ArrowHead" field="TRIANGLE"/> 
-    </void> 
-    <void property="lineStyle"> 
-     <object class="com.horstmann.violet.LineStyle" field="DOTTED"/> 
-    </void> 
-   </object> 
-   <object idref="ClassNode5"/> 
-   <object idref="InterfaceNode2"/> 
-  </void> 
   <void method="connect"> 
    <object class="com.horstmann.violet.ClassRelationshipEdge"> 
     <void property="bentStyle"> 
@@ -526,5 +663,96 @@ SymlinkBuilder</string>
    <object idref="InterfaceNode3"/> 
    <object idref="InterfaceNode1"/> 
   </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="InterfaceNode1"/> 
+   <object idref="NoteNode0"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="InterfaceNode2"/> 
+   <object idref="NoteNode1"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.ClassRelationshipEdge"> 
+    <void property="bentStyle"> 
+     <object class="com.horstmann.violet.BentStyle" field="VHV"/> 
+    </void> 
+    <void property="endArrowHead"> 
+     <object class="com.horstmann.violet.ArrowHead" field="TRIANGLE"/> 
+    </void> 
+   </object> 
+   <object idref="ClassNode11"/> 
+   <object idref="ClassNode5"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.ClassRelationshipEdge"> 
+    <void property="bentStyle"> 
+     <object class="com.horstmann.violet.BentStyle" field="VHV"/> 
+    </void> 
+    <void property="endArrowHead"> 
+     <object class="com.horstmann.violet.ArrowHead" field="TRIANGLE"/> 
+    </void> 
+   </object> 
+   <object idref="ClassNode10"/> 
+   <object idref="ClassNode5"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.ClassRelationshipEdge"> 
+    <void property="bentStyle"> 
+     <object class="com.horstmann.violet.BentStyle" field="HVH"/> 
+    </void> 
+    <void property="endArrowHead"> 
+     <object class="com.horstmann.violet.ArrowHead" field="V"/> 
+    </void> 
+   </object> 
+   <object idref="ClassNode11"/> 
+   <object idref="InterfaceNode7"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="ClassNode3"/> 
+   <object idref="NoteNode2"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="InterfaceNode3"/> 
+   <object idref="NoteNode3"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="InterfaceNode0"/> 
+   <object idref="NoteNode4"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="InterfaceNode4"/> 
+   <object idref="NoteNode5"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="InterfaceNode5"/> 
+   <object idref="NoteNode5"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.NoteEdge"/> 
+   <object idref="InterfaceNode6"/> 
+   <object idref="NoteNode5"/> 
+  </void> 
+  <void method="connect"> 
+   <object class="com.horstmann.violet.ClassRelationshipEdge"> 
+    <void property="bentStyle"> 
+     <object class="com.horstmann.violet.BentStyle" field="VHV"/> 
+    </void> 
+    <void property="endArrowHead"> 
+     <object class="com.horstmann.violet.ArrowHead" field="TRIANGLE"/> 
+    </void> 
+    <void property="lineStyle"> 
+     <object class="com.horstmann.violet.LineStyle" field="DOTTED"/> 
+    </void> 
+   </object> 
+   <object idref="ClassNode5"/> 
+   <object idref="InterfaceNode2"/> 
+  </void> 
  </object> 
 </java> 
diff --git a/doc/devel/UML/builder.violet.png b/doc/devel/UML/builder.violet.png
index 6a6c7a6..d7f688f 100644
Binary files a/doc/devel/UML/builder.violet.png and b/doc/devel/UML/builder.violet.png differ