Partiendo de una inicial sinonimia entre los significantes deponere, mandare, commendare, locare y collocare, se van configurando con el tiempo lo que serán tres figuras contractuales bien diferenciadas locatio-conductio, mandatum y depositum. Para ello, se parte del sistema de oposiciones propio del moderno estructuralismo, que se pone de manifiesto en el orden de colocación de los fragmentos del Digesto 16.3.8 a 14, del libro 30 ad Edictum de Ulpiano.
Starting from an initial lack of differentiation between the signifiers deponere, mandare, commendare, locare and collocare, what will be three distinct types of contractual arrangements are being conformed over time, locatio-conductio, mandatum y depositum. Their differentiation assumes the system of oppositions characteristic of the modern structuralism, which is evidenced in the placement order of the fragments in the Digest 16.3.8 to 14, from the book 30 ad Edictum by Ulpian.