The digital humanities are part of a culture that brings together librarians, engineers, teachers, and researchers. Their practices are interlinked to develop and build together digital projects in the disciplines of Human and Social Sciences or Arts and Letters. This article shows how collaborative digital writing, the cornerstone of the digital heritage's architecture also participates in digital publishing. Reasoning by anticipation shows how librarians and computer scientists, can support researchers to build digital research projects. A practical case illustrates the theoretical aspect and shows, through feedback, how to move from a classical Codex environment to a hypertext environment with semantic relationships. The perspectives of the article give pointers on the skills to be acquired within the framework of new teaching courses to be invented around "digital engineering".