olemus
ISO/IEC 2382:
programmikeel, mis toetab plokklausete kasutamist, näiteks
Ada, ALGOL, C, Pascal, PL/I
= a programming language that supports the use of block statements, e.g. Ada, ALGOL, C, Pascal, PL/I

ISO/IEC/IEEE 24765:
design or programming language in which sequences of statements, called blocks, are defined, usually with begin and end delimiters, and variables or labels defined in one block are not recognized outside that block