This document specifies requirements and technical specifications for information presented in tactile lettering in the built environment.
NOTE For the definition of built environment see ISO 21542.
It sets out rules for content, design, arrangement and application of information elements so that blind and partially sighted people are able to locate, identify, fluently read and interpret this information.
This document does not specify technical methods for producing tactile lettering.
This document is only applicable to permanently installed tactile lettering.