diff --git a/.DS_Store b/.DS_Store new file mode 100644 index 0000000..d243775 Binary files /dev/null and b/.DS_Store differ diff --git a/bdd/.DS_Store b/bdd/.DS_Store new file mode 100644 index 0000000..837714c Binary files /dev/null and b/bdd/.DS_Store differ diff --git a/bdd/schemas/bdd_simple.png b/bdd/schemas/bdd_simple.png new file mode 100644 index 0000000..8983acc Binary files /dev/null and b/bdd/schemas/bdd_simple.png differ diff --git a/bdd/schemas/bdd_type.png b/bdd/schemas/bdd_type.png new file mode 100644 index 0000000..69af700 Binary files /dev/null and b/bdd/schemas/bdd_type.png differ