If the basis of analysis is solidarity or combination, 'i'. 'e'., a syntagmatic reciprocity, the functival categories will be: 1. functives that can appear only as solidary; 2. functives that can appear only as combined; 3. functives that can appear both as solidary and as combined; 4. functives that can appear neither as solidary nor as combined (i. e., functives that contract only selections or that do not contract any relation at all).
- Hjelmslev (1961), Pag. 87

Let us imagine that selection is chosen as the basis of analysis. Then in the first operation the given chain is analyzed into first-degree selection-units; the category that is obtained from all these units we call the ‘funcional category’. By this, then, is understood the category of the functives that are registered in a single analysis with a given function taken as the basis of analysis. Within such a functional category four kinds of functives may be imagined: 1. functives that can appear only as selected; 2. functives that can appear only has selecting; 3. functives that can appear both as selected and as selecting; 4. functives that can appear neither as selected nor as selecti ('i'. 'e'., functives that contract only solidarities and/or combinations, or that do not contract relation at all). Each of these four categories we shall call a ‘functival category’; thus, by functival categories we mean the categories that are registered by articulation of a functional category according to functional possibilities.
- Hjelmslev (1961), Pag. 85-86