Update extraction prompt in app.py for improved clarity and detail on metadata fields

app.py

@@ -17,15 +17,34 @@ model = AutoModelForImageTextToText.from_pretrained(
 processor = AutoProcessor.from_pretrained("Qwen/Qwen3-VL-30B-A3B-Instruct")
 print("Model loaded successfully!")
 
-EXTRACTION_PROMPT = """Extract all metadata from this library catalog card and return it as valid JSON with the following fields:
-- title: The main title or name on the card
-- author: Author, creator, or associated person/organization
-- date: Any dates mentioned (publication, creation, or coverage dates)
-- call_number: Library classification or call number
-- physical_description: Details about the physical item (size, extent, format)
-- notes: Any additional notes or information
-
-Return NLY the JSON object, nothing else. If a field is not present on the card, use null for that field."""
+EXTRACTION_PROMPT = """Extract metadata from this library catalog card as JSON.
+
+Library catalog cards contain bibliographic information about materials and filing/access information. Extract whatever fields are present:
+
+CORE BIBLIOGRAPHIC FIELDS:
+- title: Full title of the work
+- author: Main author/creator (person or organization)
+- editor: Editor if different from author
+- contributor: Other contributors (translators, illustrators, etc.)
+- publication_date: Date(s) of publication
+- publisher: Publisher name
+- publication_place: Place of publication
+- physical_description: Physical details (volumes, pages, size, illustrations)
+- series: Series information if part of a series
+- edition: Edition statement
+- contents: Description of contents, volumes, or parts
+
+CATALOGING/ACCESS FIELDS:
+- call_number: Library classification number
+- subject_headings: Subject terms (often numbered list)
+- added_entries: Additional access points for co-authors, editors, etc. (often with Roman numerals)
+- notes: Any additional notes
+
+CARD-SPECIFIC:
+- filing_heading: The heading under which this card is filed (often at top, may be in all caps)
+- card_sequence: If this is a continuation card (e.g., "Card 2", "Card 3")
+
+Return ONLY valid JSON. Use null for fields not present on the card. Use arrays [] for repeating fields like subject_headings and added_entries."""
 
 
 @spaces.GPU