  This paper introduces the distributed and intelligent integrated sensing and
communications (DISAC) concept, a transformative approach for 6G wireless
networks that extends the emerging concept of integrated sensing and
communications (ISAC). DISAC addresses the limitations of the existing ISAC
models and, to overcome them, it introduces two novel foundational
functionalities for both sensing and communications: a distributed architecture
and a semantic and goal-oriented framework. The distributed architecture
enables large-scale and energy-efficient tracking of connected users and
objects, leveraging the fusion of heterogeneous sensors. The semantic and
goal-oriented intelligent and parsimonious framework, enables the transition
from classical data fusion to the composition of semantically selected
information, offering new paradigms for the optimization of resource
utilization and exceptional multi-modal sensing performance across various use
cases. This paper details DISAC's principles, architecture, and potential
applications.
