Example unfolded:

# Emails for email in contact.get('email', []): lines.append(f"EMAIL:email")

1. Introduction The vCard (VCF) format is a long-standing standard (RFC 6350) for electronic business cards, widely used in email clients, mobile phones, and contact management systems. JSON (JavaScript Object Notation), on the other hand, is a modern, lightweight data-interchange format favored by web APIs and databases.

"version": "4.0", "fullName": "John Doe", "telephone": [ "type": ["work", "voice"], "value": "+1-555-123-4567" ], "email": ["john.doe@example.com"]

# Organization if 'organization' in contact: lines.append(f"ORG:contact['organization']")

# Structured name: N:last;first;middle;prefix;suffix n_parts = [ contact.get('lastName', ''), contact.get('firstName', ''), contact.get('middleName', ''), contact.get('prefix', ''), contact.get('suffix', '') ] lines.append(f"N:';'.join(n_parts)")