This will help in locating the actual "paper" or the standard it refers to.
: This may be an internal organizational code, a niche technical specification (often seen in aerospace, telecommunications, or defense), or a specific version of a System Specification (SS) . SS-Nts-020_v.7z.001
: In some regions, "SS" prefixes are used for national standards (like Singapore Standards) or specific industrial guidelines. However, "SS-Nts-020" does not match current public listings for Singapore (which typically use SS [Number]:[Year]). This will help in locating the actual "paper"