OpenType Layout Tag Registry
OpenType Layout tags are 4-byte character strings that identify the scripts, language systems, features and baselines in an OpenType font. The registry establishes conventions for naming and using these tags. Registered tags have a specific meaning and convey precise information to developers and text-processing clients of OpenType Layout. Font developers are encouraged to use registered tags to assure compatibility and ease of use across fonts, applications, and operating systems. Additional tags may be added to this registry over time. Vendors wishing to register new tags should contact Microsoft.
The following sections contain sample sets of commonly used tags for scripts, language systems, and baselines.
OpenType Layout tag registry for:
OpenType specification