diff --git a/pnad.json b/pnad.json
new file mode 100644
index 0000000000000000000000000000000000000000..d532e33908b248166f761f9ddee11785a2c701f6
--- /dev/null
+++ b/pnad.json
@@ -0,0 +1,11 @@
+{
+    "data_source": "Fonte ainda não definida",
+    "pk": [],
+    "foreign_keys": [
+        {
+            "keys": ["estado_id"],
+            "reference_columns": ["id"],
+            "reference_table": "estado"
+        }
+    ]
+}