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<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentStyleType="text/css" data-diagram-type="CLASS" height="651px" preserveAspectRatio="none" style="width:882px;height:651px;background:#FFFFFF;" version="1.1" viewBox="0 0 882 651" width="882px" zoomAndPan="magnify"><title>Sistema de Registro de Estudiantes - Diagrama Entidad-Relaci&#243;n</title><defs/><g><g class="title" data-source-line="6"><text fill="#000000" font-family="Verdana" font-size="22" font-weight="bold" lengthAdjust="spacing" textLength="804.8154" x="34.3288" y="35.4209">Sistema de Registro de Estudiantes - Diagrama Entidad-Relaci&#243;n</text></g><!--class students--><g class="entity" data-entity="students" data-source-line="8" data-uid="ent0002" id="entity_students"><rect fill="#F8F9FA" height="125.4844" rx="2.5" ry="2.5" style="stroke:#495057;stroke-width:1;" width="246.0928" x="12" y="195.1994"/><ellipse cx="100.0938" cy="209.1994" fill="#FFFFFF" rx="9" ry="9" style="stroke:#000000;stroke-width:1;"/><path d="M104.2031,215.1994 L96.4844,215.1994 L96.4844,202.8088 L104.2031,202.8088 L104.2031,204.965 L98.9375,204.965 L98.9375,207.6369 L103.7031,207.6369 L103.7031,209.7931 L98.9375,209.7931 L98.9375,213.0431 L104.2031,213.0431 L104.2031,215.1994 Z " fill="#000000"/><text fill="#000000" font-family="Verdana" font-size="14" lengthAdjust="spacing" textLength="62.4053" x="117.5938" y="214.0461">Students</text><line style="stroke:#495057;stroke-width:1;" x1="13" x2="257.0928" y1="223.1994" y2="223.1994"/><ellipse cx="23" cy="236.8478" fill="#FFFFFF" rx="3" ry="3" style="stroke:#000000;stroke-width:1;"/><text fill="#000000" font-family="Verdana" font-size="14" font-weight="bold" lengthAdjust="spacing" textLength="15.2305" x="30" y="240.1945">Id</text><text fill="#000000" font-family="Verdana" font-size="14" lengthAdjust="spacing" textLength="66.623" x="49.6807" y="240.1945">: int &#171;PK&#187;</text><line style="stroke:#495057;stroke-width:1;" x1="13" x2="257.0928" y1="247.4963" y2="247.4963"/><ellipse cx="23" cy="261.1447" fill="#FFFFFF" rx="3" ry="3" style="stroke:#000000;stroke-width:1;"/><text fill="#000000" font-family="Verdana" font-size="14" lengthAdjust="spacing" textLength="154.9639" x="30" y="264.4914">Name : nvarchar(100)</text><ellipse cx="23" cy="277.4416" fill="#FFFFFF" rx="3" ry="3" style="stroke:#000000;stroke-width:1;"/><text fill="#000000" font-family="Verdana" font-size="14" lengthAdjust="spacing" textLength="222.0928" x="30" y="280.7882">Email : nvarchar(255) &#171;unique&#187;</text><ellipse cx="23" cy="293.7384" fill="#FFFFFF" rx="3" ry="3" style="stroke:#000000;stroke-width:1;"/><text fill="#000000" font-family="Verdana" font-size="14" lengthAdjust="spacing" textLength="156.502" x="30" y="297.0851">CreatedAt : datetime2</text><text fill="#000000" font-family="Verdana" font-size="14" lengthAdjust="spacing" textLength="160.3779" x="30" y="313.382">UpdatedAt : datetime2</text></g><!--class professors--><g class="entity" data-entity="professors" data-source-line="17" data-uid="ent0003" id="entity_professors"><rect fill="#F8F9FA" height="76.5938" rx="2.5" ry="2.5" style="stroke:#495057;stroke-width:1;" width="178.9639" x="506.56" y="58.6094"/><ellipse cx="556.0375" cy="72.6094" fill="#FFFFFF" rx="9" ry="9" style="stroke:#000000;stroke-width:1;"/><path d="M560.1469,78.6094 L552.4282,78.6094 L552.4282,66.2188 L560.1469,66.2188 L560.1469,68.375 L554.8813,68.375 L554.8813,71.0469 L559.6469,71.0469 L559.6469,73.2031 L554.8813,73.2031 L554.8813,76.4531 L560.1469,76.4531 L560.1469,78.6094 Z " fill="#000000"/><text fill="#000000" font-family="Verdana" font-size="14" lengthAdjust="spacing" textLength="72.5088" x="573.5375" y="77.4561">Professors</text><line style="stroke:#495057;stroke-width:1;" x1="507.56" x2="684.5239" y1="86.6094" y2="86.6094"/><ellipse cx="517.56" cy="100.2578" fill="#FFFFFF" rx="3" ry="3" style="stroke:#000000;stroke-width:1;"/><text fill="#000000" font-family="Verdana" font-size="14" font-weight="bold" lengthAdjust="spacing" textLength="15.2305" x="524.56" y="103.6045">Id</text><text fill="#