The script attribute specifies the writing script of a language, such as "Cyrl". Like the xml:lang attribute, the script attribute is allowed on all text-containing elements plus one non-text-containing element: langSet. Use values found for “script” in the IANA language subtag registry. Do not use deprecated values. You should omit the script attribute when it makes no useful distinction (as for the primary or sole script of a language). In particular, you should omit the script attribute if it matches the "Suppress-Script" field in the registry for the language you used.