Update app.py

app.py

@@ -237,9 +237,19 @@ def split_into_chunks(texts, references, chunk_size, chunk_overlap):
     chunks = []
 
     for text, reference in zip(texts, references):
-        chunks.extend([Document(page_content=chunk, metadata={"source": reference}) for chunk in text_splitter.split_text(text)])
+        chunks.extend([
+            Document(
+                page_content=chunk,
+                metadata={
+                    "source": reference,
+                    "usage": "doc"
+                }
+            ) 
+            for chunk in text_splitter.split_text(text)
+        ])
     return chunks
 
+
 # Setup Vectorstore
 def embed_documents_into_vectorstore(chunks, model_name, persist_directory):
     print("Start setup_vectorstore_function")