diagrama de entregas

* uno mas, con las tablas relacionadas con las entregas.

diff --git a/doc/schema/curso2.dia b/doc/schema/sercom_curso.dia
similarity index 100%
rename from doc/schema/curso2.dia
rename to doc/schema/sercom_curso.dia

diff --git a/doc/schema/sercom_entrega.dia b/doc/schema/sercom_entrega.dia
new file mode 100644 (file)
index 0000000..1e5e6da
--- /dev/null
+++ b/doc/schema/sercom_entrega.dia
@@ -0,0 +1,4118 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<dia:diagram xmlns:dia="http://www.lysator.liu.se/~alla/dia/">
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+    <dia:attribute name="pagebreak">
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+    <dia:attribute name="paper">
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+        <dia:attribute name="tmargin">
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+        <dia:attribute name="lmargin">
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+        <dia:attribute name="rmargin">
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+        <dia:attribute name="is_portrait">
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+        <dia:attribute name="scaling">
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+        <dia:attribute name="fitto">
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+    <dia:attribute name="grid">
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+        <dia:attribute name="visible_y">
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+        <dia:composite type="color"/>
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+    <dia:attribute name="color">
+      <dia:color val="#d8e5e5"/>
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+    <dia:attribute name="guides">
+      <dia:composite type="guides">
+        <dia:attribute name="hguides"/>
+        <dia:attribute name="vguides"/>
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+    </dia:attribute>
+  </dia:diagramdata>
+  <dia:layer name="Background" visible="true">
+    <dia:object type="UML - Class" version="0" id="O0">
+      <dia:attribute name="obj_pos">
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+      <dia:attribute name="elem_height">
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+      <dia:attribute name="name">
+        <dia:string>#alumno_inscripto#</dia:string>
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+      <dia:attribute name="stereotype">
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+      </dia:attribute>
+      <dia:attribute name="comment">
+        <dia:string>##</dia:string>
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+      <dia:attribute name="visible_comments">
+        <dia:boolean val="false"/>
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+      <dia:attribute name="wrap_operations">
+        <dia:boolean val="false"/>
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+      <dia:attribute name="wrap_after_char">
+        <dia:int val="40"/>
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+      <dia:attribute name="comment_line_length">
+        <dia:int val="40"/>
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+      <dia:attribute name="comment_tagging">
+        <dia:boolean val="false"/>
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+      <dia:attribute name="line_color">
+        <dia:color val="#000000"/>
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+      <dia:attribute name="fill_color">
+        <dia:color val="#ffffff"/>
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+      <dia:attribute name="text_color">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font">
+        <dia:font family="monospace" style="0" name="Courier"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_font">
+        <dia:font family="monospace" style="88" name="Courier-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
+      </dia:attribute>
+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font">
+        <dia:font family="sans" style="8" name="Helvetica-Oblique"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font_height">
+        <dia:real val="0.80000000000000004"/>
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+      <dia:attribute name="polymorphic_font_height">
+        <dia:real val="0.80000000000000004"/>
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+        <dia:real val="0.80000000000000004"/>
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+      <dia:attribute name="classname_font_height">
+        <dia:real val="1"/>
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+      <dia:attribute name="abstract_classname_font_height">
+        <dia:real val="1"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font_height">
+        <dia:real val="0.69999999999999996"/>
+      </dia:attribute>
+      <dia:attribute name="attributes">
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#id#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INTEGER#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#curso_id#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#alumno_id#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#condicional#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#TINYINT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#tutor_id#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+      </dia:attribute>
+      <dia:attribute name="operations">
+        <dia:composite type="umloperation">
+          <dia:attribute name="name">
+            <dia:string>#Primary Key#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="stereotype">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#pk#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="inheritance_type">
+            <dia:enum val="2"/>
+          </dia:attribute>
+          <dia:attribute name="query">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="parameters">
+            <dia:composite type="umlparameter">
+              <dia:attribute name="name">
+                <dia:string>#id#</dia:string>
+              </dia:attribute>
+              <dia:attribute name="type">
+                <dia:string>##</dia:string>
+              </dia:attribute>
+              <dia:attribute name="value">
+                <dia:string>##</dia:string>
+              </dia:attribute>
+              <dia:attribute name="comment">
+                <dia:string>##</dia:string>
+              </dia:attribute>
+              <dia:attribute name="kind">
+                <dia:enum val="0"/>
+              </dia:attribute>
+            </dia:composite>
+          </dia:attribute>
+        </dia:composite>
+      </dia:attribute>
+      <dia:attribute name="template">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="templates"/>
+    </dia:object>
+    <dia:object type="UML - Class" version="0" id="O1">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-31.95,-8.3"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-32,-8.35;-24.45,-1.65"/>
+      </dia:attribute>
+      <dia:attribute name="elem_corner">
+        <dia:point val="-31.95,-8.3"/>
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+      <dia:attribute name="elem_width">
+        <dia:real val="7.4500000000000002"/>
+      </dia:attribute>
+      <dia:attribute name="elem_height">
+        <dia:real val="6.5999999999999996"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>#ejercicio#</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="comment">
+        <dia:string>##</dia:string>
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+        <dia:boolean val="false"/>
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+        <dia:boolean val="false"/>
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+        <dia:boolean val="false"/>
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+      <dia:attribute name="visible_attributes">
+        <dia:boolean val="true"/>
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+        <dia:boolean val="true"/>
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+      <dia:attribute name="visible_comments">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="wrap_operations">
+        <dia:boolean val="false"/>
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+        <dia:int val="40"/>
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+      <dia:attribute name="comment_line_length">
+        <dia:int val="40"/>
+      </dia:attribute>
+      <dia:attribute name="comment_tagging">
+        <dia:boolean val="false"/>
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+      <dia:attribute name="line_color">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="fill_color">
+        <dia:color val="#ffffff"/>
+      </dia:attribute>
+      <dia:attribute name="text_color">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font">
+        <dia:font family="monospace" style="0" name="Courier"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_font">
+        <dia:font family="monospace" style="88" name="Courier-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
+      </dia:attribute>
+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font">
+        <dia:font family="sans" style="8" name="Helvetica-Oblique"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font_height">
+        <dia:real val="0.80000000000000004"/>
+      </dia:attribute>
+      <dia:attribute name="polymorphic_font_height">
+        <dia:real val="0.80000000000000004"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_font_height">
+        <dia:real val="0.80000000000000004"/>
+      </dia:attribute>
+      <dia:attribute name="classname_font_height">
+        <dia:real val="1"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font_height">
+        <dia:real val="1"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font_height">
+        <dia:real val="0.69999999999999996"/>
+      </dia:attribute>
+      <dia:attribute name="attributes">
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#id#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INTEGER#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#curso_id#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#numero#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#enunciado_id#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#INT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#grupal#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#TINYINT#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="value">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+        </dia:composite>
+      </dia:attribute>
+      <dia:attribute name="operations">
+        <dia:composite type="umloperation">
+          <dia:attribute name="name">
+            <dia:string>#Primary Key#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="stereotype">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="type">
+            <dia:string>#pk#</dia:string>
+          </dia:attribute>
+          <dia:attribute name="visibility">
+            <dia:enum val="0"/>
+          </dia:attribute>
+          <dia:attribute name="comment">
+            <dia:string>##</dia:string>
+          </dia:attribute>
+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="inheritance_type">
+            <dia:enum val="2"/>
+          </dia:attribute>
+          <dia:attribute name="query">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="class_scope">
+            <dia:boolean val="false"/>
+          </dia:attribute>
+          <dia:attribute name="parameters">
+            <dia:composite type="umlparameter">
+              <dia:attribute name="name">
+                <dia:string>#id#</dia:string>
+              </dia:attribute>
+              <dia:attribute name="type">
+                <dia:string>##</dia:string>
+              </dia:attribute>
+              <dia:attribute name="value">
+                <dia:string>##</dia:string>
+              </dia:attribute>
+              <dia:attribute name="comment">
+                <dia:string>##</dia:string>
+              </dia:attribute>
+              <dia:attribute name="kind">
+                <dia:enum val="0"/>
+              </dia:attribute>
+            </dia:composite>
+          </dia:attribute>
+        </dia:composite>
+      </dia:attribute>
+      <dia:attribute name="template">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="templates"/>
+    </dia:object>
+    <dia:object type="UML - Class" version="0" id="O2">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-33.85,-32.3"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-33.9,-32.35;-26.35,-26.45"/>
+      </dia:attribute>
+      <dia:attribute name="elem_corner">
+        <dia:point val="-33.85,-32.3"/>
+      </dia:attribute>
+      <dia:attribute name="elem_width">
+        <dia:real val="7.4500000000000002"/>
+      </dia:attribute>
+      <dia:attribute name="elem_height">
+        <dia:real val="5.8000000000000007"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>#entrega#</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="comment">
+        <dia:string>##</dia:string>
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+          <dia:attribute name="name">
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+      <dia:attribute name="operations">
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+          <dia:attribute name="stereotype">
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+          <dia:attribute name="type">
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+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
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+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
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+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
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+      <dia:attribute name="comment_font">
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+      </dia:attribute>
+      <dia:attribute name="operations">
+        <dia:composite type="umloperation">
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+          <dia:attribute name="stereotype">
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+          <dia:attribute name="type">
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+          <dia:attribute name="comment">
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+            <dia:boolean val="false"/>
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+          <dia:attribute name="inheritance_type">
+            <dia:enum val="2"/>
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+              <dia:attribute name="comment">
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+              <dia:attribute name="kind">
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+      <dia:attribute name="elem_height">
+        <dia:real val="9.7999999999999989"/>
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+      <dia:attribute name="name">
+        <dia:string>#instancia_de_entrega#</dia:string>
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+      <dia:attribute name="stereotype">
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+      <dia:attribute name="comment">
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+        <dia:boolean val="false"/>
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+      <dia:attribute name="comment_line_length">
+        <dia:int val="40"/>
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+        <dia:boolean val="false"/>
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+      <dia:attribute name="line_color">
+        <dia:color val="#000000"/>
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+      <dia:attribute name="fill_color">
+        <dia:color val="#ffffff"/>
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+      <dia:attribute name="text_color">
+        <dia:color val="#000000"/>
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+      <dia:attribute name="normal_font">
+        <dia:font family="monospace" style="0" name="Courier"/>
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+      <dia:attribute name="abstract_font">
+        <dia:font family="monospace" style="88" name="Courier-BoldOblique"/>
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+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
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+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font">
+        <dia:font family="sans" style="8" name="Helvetica-Oblique"/>
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+      <dia:attribute name="normal_font_height">
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+        <dia:real val="0.80000000000000004"/>
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+        <dia:real val="1"/>
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+      <dia:attribute name="comment_font_height">
+        <dia:real val="0.69999999999999996"/>
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+      <dia:attribute name="attributes">
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+          <dia:attribute name="name">
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+          <dia:attribute name="type">
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
+            <dia:string>#numero#</dia:string>
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+          <dia:attribute name="visibility">
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+          <dia:attribute name="abstract">
+            <dia:boolean val="false"/>
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+          </dia:attribute>
+        </dia:composite>
+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
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+          <dia:attribute name="type">
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+          <dia:attribute name="visibility">
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+        <dia:composite type="umlattribute">
+          <dia:attribute name="name">
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+          <dia:attribute name="value">
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+          <dia:attribute name="comment">
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+        <dia:composite type="umlattribute">
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+        <dia:composite type="umlattribute">
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+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
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+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
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+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
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+      <dia:attribute name="comment_font">
+        <dia:font family="sans" style="8" name="Helvetica-Oblique"/>
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+              </dia:attribute>
+              <dia:attribute name="kind">
+                <dia:enum val="0"/>
+              </dia:attribute>
+            </dia:composite>
+          </dia:attribute>
+        </dia:composite>
+      </dia:attribute>
+      <dia:attribute name="template">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="templates"/>
+    </dia:object>
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+        <dia:point val="-26.75,-38.35"/>
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+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-26.8,-38.4;-22.55,-36.1"/>
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+      <dia:attribute name="elem_corner">
+        <dia:point val="-26.75,-38.35"/>
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+      <dia:attribute name="elem_width">
+        <dia:real val="4.1500000000000004"/>
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+      <dia:attribute name="elem_height">
+        <dia:real val="2.1999999999999997"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>#instancia#</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="comment">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="abstract">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="suppress_attributes">
+        <dia:boolean val="false"/>
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+        <dia:boolean val="false"/>
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+      <dia:attribute name="visible_attributes">
+        <dia:boolean val="true"/>
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+      <dia:attribute name="visible_operations">
+        <dia:boolean val="true"/>
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+      <dia:attribute name="visible_comments">
+        <dia:boolean val="false"/>
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+      <dia:attribute name="wrap_operations">
+        <dia:boolean val="false"/>
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+        <dia:int val="40"/>
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+      <dia:attribute name="comment_line_length">
+        <dia:int val="40"/>
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+      <dia:attribute name="comment_tagging">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="line_color">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="fill_color">
+        <dia:color val="#ffffff"/>
+      </dia:attribute>
+      <dia:attribute name="text_color">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font">
+        <dia:font family="monospace" style="0" name="Courier"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_font">
+        <dia:font family="monospace" style="88" name="Courier-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
+      </dia:attribute>
+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font">
+        <dia:font family="sans" style="8" name="Helvetica-Oblique"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font_height">
+        <dia:real val="0.80000000000000004"/>
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+      <dia:attribute name="polymorphic_font_height">
+        <dia:real val="0.80000000000000004"/>
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+        <dia:real val="0.80000000000000004"/>
+      </dia:attribute>
+      <dia:attribute name="classname_font_height">
+        <dia:real val="1"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font_height">
+        <dia:real val="1"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font_height">
+        <dia:real val="0.69999999999999996"/>
+      </dia:attribute>
+      <dia:attribute name="attributes"/>
+      <dia:attribute name="operations"/>
+      <dia:attribute name="template">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="templates"/>
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+        <dia:point val="-56,-35.7"/>
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+        <dia:rectangle val="-56.05,-35.75;-50.5,-33.45"/>
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+        <dia:real val="5.4500000000000002"/>
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+      <dia:attribute name="elem_height">
+        <dia:real val="2.1999999999999997"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>#responsable#</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="comment">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="abstract">
+        <dia:boolean val="false"/>
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+        <dia:boolean val="false"/>
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+        <dia:boolean val="false"/>
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+        <dia:color val="#000000"/>
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+      <dia:attribute name="fill_color">
+        <dia:color val="#ffffff"/>
+      </dia:attribute>
+      <dia:attribute name="text_color">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font">
+        <dia:font family="monospace" style="0" name="Courier"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_font">
+        <dia:font family="monospace" style="88" name="Courier-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
+      </dia:attribute>
+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font">
+        <dia:font family="sans" style="8" name="Helvetica-Oblique"/>
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+        <dia:real val="0.80000000000000004"/>
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+        <dia:real val="0.80000000000000004"/>
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+      <dia:attribute name="classname_font_height">
+        <dia:real val="1"/>
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+      <dia:attribute name="abstract_classname_font_height">
+        <dia:real val="1"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font_height">
+        <dia:real val="0.69999999999999996"/>
+      </dia:attribute>
+      <dia:attribute name="attributes"/>
+      <dia:attribute name="operations"/>
+      <dia:attribute name="template">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="templates"/>
+    </dia:object>
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+      <dia:attribute name="obj_pos">
+        <dia:point val="-42.5,-27.7"/>
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+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-42.55,-27.75;-39.9,-25.45"/>
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+        <dia:point val="-42.5,-27.7"/>
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+      <dia:attribute name="elem_height">
+        <dia:real val="2.1999999999999997"/>
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+      <dia:attribute name="name">
+        <dia:string>#tutor#</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="comment">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="abstract">
+        <dia:boolean val="false"/>
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+      <dia:attribute name="suppress_attributes">
+        <dia:boolean val="false"/>
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+        <dia:boolean val="false"/>
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+      <dia:attribute name="comment_line_length">
+        <dia:int val="40"/>
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+      <dia:attribute name="comment_tagging">
+        <dia:boolean val="false"/>
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+        <dia:color val="#000000"/>
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+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="normal_font">
+        <dia:font family="monospace" style="0" name="Courier"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_font">
+        <dia:font family="monospace" style="88" name="Courier-BoldOblique"/>
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+      <dia:attribute name="polymorphic_font">
+        <dia:font family="monospace" style="8" name="Courier-Oblique"/>
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+      <dia:attribute name="classname_font">
+        <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+      </dia:attribute>
+      <dia:attribute name="abstract_classname_font">
+        <dia:font family="sans" style="88" name="Helvetica-BoldOblique"/>
+      </dia:attribute>
+      <dia:attribute name="comment_font">
+        <dia:font family="sans" style="8" name="Helvetica-Oblique"/>
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+        <dia:real val="0.80000000000000004"/>
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+        <dia:real val="0.69999999999999996"/>
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+        <dia:boolean val="false"/>
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+      <dia:attribute name="templates"/>
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+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
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+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
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+      <dia:attribute name="name">
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+      <dia:attribute name="stereotype">
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+        <dia:rectangle val="-52.9,-16;-47.275,-7.2"/>
+      </dia:attribute>
+      <dia:attribute name="orth_points">
+        <dia:point val="-52.05,-15.95"/>
+        <dia:point val="-52.05,-8.65"/>
+        <dia:point val="-47.325,-8.65"/>
+        <dia:point val="-47.325,-7.25"/>
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+      <dia:attribute name="orth_orient">
+        <dia:enum val="1"/>
+        <dia:enum val="0"/>
+        <dia:enum val="1"/>
+      </dia:attribute>
+      <dia:attribute name="orth_autoroute">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="text_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:connections>
+        <dia:connection handle="0" to="O4" connection="6"/>
+        <dia:connection handle="1" to="O9" connection="1"/>
+      </dia:connections>
+    </dia:object>
+    <dia:object type="UML - Generalization" version="1" id="O22">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-24.675,-36.15"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-27.7,-36.2;-23.825,-20.4"/>
+      </dia:attribute>
+      <dia:attribute name="orth_points">
+        <dia:point val="-24.675,-36.15"/>
+        <dia:point val="-24.675,-22.075"/>
+        <dia:point val="-27.65,-22.075"/>
+        <dia:point val="-27.65,-20.45"/>
+      </dia:attribute>
+      <dia:attribute name="orth_orient">
+        <dia:enum val="1"/>
+        <dia:enum val="0"/>
+        <dia:enum val="1"/>
+      </dia:attribute>
+      <dia:attribute name="orth_autoroute">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="text_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:connections>
+        <dia:connection handle="0" to="O11" connection="6"/>
+        <dia:connection handle="1" to="O8" connection="1"/>
+      </dia:connections>
+    </dia:object>
+    <dia:object type="UML - Generalization" version="1" id="O23">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-26.75,-36.15"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-30.175,-36.2;-25.9,-32.25"/>
+      </dia:attribute>
+      <dia:attribute name="orth_points">
+        <dia:point val="-26.75,-36.15"/>
+        <dia:point val="-26.75,-33.725"/>
+        <dia:point val="-30.125,-33.725"/>
+        <dia:point val="-30.125,-32.3"/>
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+      <dia:attribute name="orth_orient">
+        <dia:enum val="1"/>
+        <dia:enum val="0"/>
+        <dia:enum val="1"/>
+      </dia:attribute>
+      <dia:attribute name="orth_autoroute">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="text_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:connections>
+        <dia:connection handle="0" to="O11" connection="5"/>
+        <dia:connection handle="1" to="O2" connection="1"/>
+      </dia:connections>
+    </dia:object>
+    <dia:object type="UML - Generalization" version="1" id="O24">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-30.125,-26.5"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-30.975,-26.55;-27.6,-20.4"/>
+      </dia:attribute>
+      <dia:attribute name="orth_points">
+        <dia:point val="-30.125,-26.5"/>
+        <dia:point val="-30.125,-22.05"/>
+        <dia:point val="-27.65,-22.05"/>
+        <dia:point val="-27.65,-20.45"/>
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+      <dia:attribute name="orth_orient">
+        <dia:enum val="1"/>
+        <dia:enum val="0"/>
+        <dia:enum val="1"/>
+      </dia:attribute>
+      <dia:attribute name="orth_autoroute">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="text_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:connections>
+        <dia:connection handle="0" to="O2" connection="6"/>
+        <dia:connection handle="1" to="O8" connection="1"/>
+      </dia:connections>
+    </dia:object>
+    <dia:object type="UML - Generalization" version="1" id="O25">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-53.275,-33.5"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-54.125,-33.55;-52,-21.7"/>
+      </dia:attribute>
+      <dia:attribute name="orth_points">
+        <dia:point val="-53.275,-33.5"/>
+        <dia:point val="-53.275,-27.4875"/>
+        <dia:point val="-52.05,-27.4875"/>
+        <dia:point val="-52.05,-21.75"/>
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+      <dia:attribute name="orth_orient">
+        <dia:enum val="1"/>
+        <dia:enum val="0"/>
+        <dia:enum val="1"/>
+      </dia:attribute>
+      <dia:attribute name="orth_autoroute">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="text_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:connections>
+        <dia:connection handle="0" to="O12" connection="6"/>
+        <dia:connection handle="1" to="O4" connection="1"/>
+      </dia:connections>
+    </dia:object>
+    <dia:object type="UML - Generalization" version="1" id="O26">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-43.025,-14.9"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-47.375,-14.95;-42.175,-7.2"/>
+      </dia:attribute>
+      <dia:attribute name="orth_points">
+        <dia:point val="-43.025,-14.9"/>
+        <dia:point val="-43.025,-8.65"/>
+        <dia:point val="-47.325,-8.65"/>
+        <dia:point val="-47.325,-7.25"/>
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+      <dia:attribute name="orth_orient">
+        <dia:enum val="1"/>
+        <dia:enum val="0"/>
+        <dia:enum val="1"/>
+      </dia:attribute>
+      <dia:attribute name="orth_autoroute">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="text_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:connections>
+        <dia:connection handle="0" to="O0" connection="6"/>
+        <dia:connection handle="1" to="O9" connection="1"/>
+      </dia:connections>
+    </dia:object>
+    <dia:object type="UML - Generalization" version="1" id="O27">
+      <dia:attribute name="obj_pos">
+        <dia:point val="-40.675,-38.5"/>
+      </dia:attribute>
+      <dia:attribute name="obj_bb">
+        <dia:rectangle val="-41.525,-38.55;-38.6,-7"/>
+      </dia:attribute>
+      <dia:attribute name="orth_points">
+        <dia:point val="-40.675,-38.5"/>
+        <dia:point val="-40.675,-32.85"/>
+        <dia:point val="-38.65,-32.85"/>
+        <dia:point val="-38.65,-7.05"/>
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+      <dia:attribute name="orth_orient">
+        <dia:enum val="1"/>
+        <dia:enum val="0"/>
+        <dia:enum val="1"/>
+      </dia:attribute>
+      <dia:attribute name="orth_autoroute">
+        <dia:boolean val="false"/>
+      </dia:attribute>
+      <dia:attribute name="text_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="line_colour">
+        <dia:color val="#000000"/>
+      </dia:attribute>
+      <dia:attribute name="name">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:attribute name="stereotype">
+        <dia:string>##</dia:string>
+      </dia:attribute>
+      <dia:connections>
+        <dia:connection handle="0" to="O10" connection="6"/>
+        <dia:connection handle="1" to="O5" connection="1"/>
+      </dia:connections>
+    </dia:object>
+  </dia:layer>
+</dia:diagram>