{"json_modified": "2016-08-26T06:36:53.795236", "uuid": "d53c2133-34d0-44b3-a7fe-aeac10c4fde9", "title": "Quality values", "url": "/en-US/docs/Glossary/Quality_values", "tags": ["glossary", "WebMechanics", "Glossary"], "translations": [], "modified": "2016-08-26T06:36:54", "label": "Quality values", "localization_tags": [], "locale": "en-US", "id": 193151, "last_edit": "2016-08-26T06:36:49", "summary": "<strong>Quality values</strong>, or <em>q-values</em> or <em>q-factors</em>, are used to describe the order of priority of values in a comma-separated list. It is a special syntax allowed in some <a href=\"/en-US/docs/Web/HTTP/Headers\">HTTP headers</a> and in HTML. The importance of a value is marked by the suffix <code>';q='</code> immediately followed by a value between <code>0</code> and <code>1</code> included, with up to three decimal digits, the highest value denoting the highest priority. When not present, the default value is <code>1</code>.", "sections": [{"id": "Examples", "title": "Examples"}, {"id": "Browser-specific_information", "title": "Browser-specific information"}, {"id": "Firefox", "title": "Firefox"}, {"id": "More_information", "title": "More information"}], "slug": "Glossary/Quality_values", "review_tags": []}