diff --git a/doc/db transition.dia b/doc/db transition.dia
new file mode 100644
index 0000000..fcebae9
--- /dev/null
+++ b/doc/db transition.dia	
@@ -0,0 +1,1661 @@
+<?xml version="1.0" encoding="UTF-8"?>
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+      <dia:attribute name="text">
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+          <dia:attribute name="font">
+            <dia:font family="sans" style="80" name="Helvetica-Bold"/>
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+      <dia:attribute name="text">
+        <dia:composite type="text">
+          <dia:attribute name="string">
+            <dia:string>#comment#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="font">
+            <dia:font family="sans" style="0" name="Helvetica"/>
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+      <dia:attribute name="padding">
+        <dia:real val="0.5"/>
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+      <dia:attribute name="text">
+        <dia:composite type="text">
+          <dia:attribute name="string">
+            <dia:string>#timestamp#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="font">
+            <dia:font family="sans" style="0" name="Helvetica"/>
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+          <dia:attribute name="color">
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+          <dia:attribute name="alignment">
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+      <dia:attribute name="autorouting">
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+      <dia:attribute name="line_style">
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+      <dia:attribute name="obj_bb">
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+      <dia:attribute name="end_arrow_width">
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+        <dia:connection handle="3" to="O18" connection="16"/>
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+</dia:diagram>