📝 Add MCD on the readme file

Documents/Diagramme/BDD/README_BDD.md

@@ -176,3 +176,101 @@ notif --> athlete
 athlete <-- friendship
 @enduml
 ```
+
+```plantuml
+@startuml
+skinparam classAttributeIconSize 0
+package MCD{
+entity "Athlete" as athlete {
+    {static} idAthlete
+    username
+    nom
+    prenom
+    email
+    sexe
+    taille
+    poids
+    motDePasse
+    dateNaissance
+    isCoach
+}
+
+entity "Notification" as notif {
+    {static} idNotif
+    message
+    date
+    statut
+    urgence
+    #athleteId
+}
+
+entity "Statistique" as stats {
+    {static} idStatistique
+    poids
+    fcMoyenne
+    fcMax
+    caloriesBruleesMoy
+    date 
+    #athleteId
+}
+
+entity "Entrainement" as training {
+    {static} idEntrainement
+    date
+    description
+    latitude
+    longitude
+    feedback
+    #athleteId
+}
+
+entity "SourceDonnee" as source {
+    {static} idSource
+    type 
+    modele
+    precision
+    #athleteId
+}  
+
+entity "Activite" as activity {
+    {static} idActivité
+    type
+    date
+    heureDeDebut
+    heureDeFin
+    effortRessent
+    variabilite
+    variance
+    ecartType
+    moyenne
+    maximum
+    minimum
+    temperatureMoyenne
+    #athleteId 
+    #sourceId
+}
+
+entity "FréquenceCardiaque" as fc {
+    {static} idFc
+    altitude
+    temps : time
+    température    
+    bpm
+    longitude
+    latitude
+    #activitéId
+}
+
+}
+activity "0..n" --- "1..1" athlete : réalise
+activity "1..n" --- "1..1" source : possede
+activity "1..1" --- "1..n" fc : enregistre
+athlete "1..n" --- "0..1" source : possede
+stats "0..n" --- "1..1" athlete : possede
+training "0..n" --- "1..n" athlete : participe
+training "0..n" --- "1..1" athlete : donne
+athlete "0..n" --- "1..n" athlete : est ami
+notif "0..n" --- "1..n" athlete : recoit
+notif "0..n" --- "1..1" athlete : envoie
+@enduml
+```