ISO 19154:2014 Geographic information — Ubiquitous public access — Reference model
ISO 19154:2014
https://www.iso.org/standard/32572.html?browse=tc
This standard specifies formats and methods for floating-point arithmetic in computer systems: standard and extended functions with single, double, extended, and extendable precision, and recommends formats for data interchange. Exception conditions are defined and standard handling of these conditions is specified.