ISO 1101:2017 defines the symbol language for geometrical specification of workpieces and the rules for its interpretation.
It provides the foundation for geometrical specification.
The illustrations in this document are intended to illustrate how a specification can be fully indicated with visible annotation (including e.g. TEDs).
NOTE: Other International Standards referenced in Clause 2 and in Tables 3 and 4 provide more detailed information on geometrical tolerancing.