In this paper, we present, SALT, a framework for mapping heterogeneous linguistic formats from one another based on a model-based approach, i.e. independently of the actual formats in which the corresponding linguistic data is being expressed. While we describe the underlying concept of this framework, we identify how it echoes past ongoing standardisation activities within ISO committee TC 37/SC 4, and in particular, the possible conceptual equivalences with ISO CD 24612 (LAF) combined with ISO 24610-1 (FSR), as well as the possible role of the central data category registry (ISOCat), currently under deployment. We thus show the adequacy of our methodology and its capacity to integrate a wide range of possible linguistic annotation models.