Italian foods are considered part of Italian heritage and some are protected with a classification system. A similar system could protect Sardinian textiles.
Italian Wine Classification System - Betty's Wine Musings
10 Great Bottles of Italian White Wine Under $25 - The New York Times
ITALIAN WINE PYRAMID CLASSIFICATION
How to Decipher Italian Wine Classifications
Italian Wine Labels - Guide & Learn
The Best Wine For Italian Food
The History of Italian Food and Wine - Language & Luxury™
Beginners Guide to italian Wines: Quality Classifications for Wine
Italy Wine Regions, Grapes