diff --git a/www/services/esempio.py b/www/services/api_retriever.py
similarity index 100%
rename from www/services/esempio.py
rename to www/services/api_retriever.py
diff --git a/www/services/standardizer.py b/www/services/standardizer.py
new file mode 100644
index 0000000..af82645
--- /dev/null
+++ b/www/services/standardizer.py
@@ -0,0 +1,8 @@
+OPENALEX_MAPPING = {
+    "id": "UT",              # Identificativo univoco
+    "doi": "DI",             # DOI
+    "title": "TI",           # Titolo dell'articolo
+    "publication_year": "PY",# Anno di pubblicazione
+    "cited_by_count": "TC",  # Times Cited
+    # ... continuate con gli altri campi del glossario
+}
\ No newline at end of file
diff --git a/www/services/validation.py b/www/services/validation.py
new file mode 100644
index 0000000..e69de29