Update README.md

README.md

@@ -12,4 +12,26 @@ size_categories:
 - 1K<n<10K
 ---
 NOMOS_EUR_Lex_Sum is a Greek-language legal text summarization dataset derived from official documents of the EUR-Lex portal.
-The dataset focuses on extractive summarization of European Union legislative texts written in Greek and was developed in the context of the +NOMOS project
+The dataset focuses on extractive summarization of European Union legislative texts written in Greek and was developed in the context of the +NOMOS project
+
+## Dataset Structure
+
+The dataset follows a hierarchical folder structure based on EUR-Lex thematic categories.
+
+- Top-level folders represent broad policy areas
+- Intermediate folders represent subtopics
+- Only the final-level folders (leaf folders) contain actual data files
+
+Each leaf folder corresponds to **one EU legal document and its summary**.
+
+### Files inside a leaf folder
+
+Only leaf folders contain the following files:
+
+  #### CELEX file (`<celex_id>.txt`)
+  - Full legal text in Greek
+  - Filename corresponds to the official CELEX identifier (e.g., `32013R1408.txt`).
+  
+  #### `summary.txt`
+  - Summary of the legal document
+  - Written in Greek