[...] we can define [...] a ‘process’ as a relational hierarchy.
- Hjelmslev (1961), a pag.38-39

[...] we need to distinguish between two sorts of hierarchies: ‘processes’ and ‘systems’.
- Hjelmslev (1961), a pag.29

[An] important distinction for linguistic theory is the one between the both-and function, or “conjunction”, and the either-or function, or “disjunction”. This is what is behind the distinction between process and system: in the process, in the text, is present a both-and, a conjunction or coexistence between the functives entering therein; in the system is present an either-or, a disjunction or alternation between the functives entering therein.
- Hjelmslev (1961), a pag.36

‘A priori’ it would seem to be a generally valid thesis that for every ‘process’ there is a corresponding ‘system’, by which the process can be analyzed and described by means of a limited number of premisses.
- Hjelmslev (1961), a pag.9