Trnk

Trunk (trn) is a service unit of some artificial programming languages, such as Metis, Ant, XPL0, Ol, PHLPS, as well as mathematical formulas of the XPL0 language. Used for indentation, expressing numbers, defining structures, etc. In Metis and Ant, trnka is called drkia (drk), in Ilukta - lume (lum).

In XPL0, it is a maximum-length space that allows the creation of both numeric and real constants. The trunks themselves are recorded using managers