S-DI (aspect of the relation sign-dynamic interpretant)
It describes the relation between Sign and Dynamic Interpretant. It is the transformation of representation itself (given in the relation S-DO) into a representation able to produce effects (whether emotional, energetic or logic). In other words, it is the manner of fluency of the representation from the point of view of the interpreter. Once again, the sign appears loaded with the purpose given by the final interpretant. After coming to terms with the dynamic object, it needs to adapt itself to the concrete circumstances of representation, or the real situation that determines the production of an interpretative effect. The relation S-DI is, therefore, a kind of compromise between the possibilities of representation of the sign and the concrete circumstances in which this representation occurs. A same sign (a word, for example) can produce infinite representative dynamic interpretants (each time that a word is used by the any speaker of a community) and in each of these circumstances it may succeed or not in transmitting the Form of its dynamic object. The way that the whole community tends to use this word in all possible situations corresponds to the last representative trichotomy, the S-FI relation.