Data sharing is an imperative for the Alliance that should be pursued through systematic efforts. Sharing interoperable data to achieve Allied objectives shall become the norm and a shared responsibility for Allies and the NATO Enterprise alike. Initiatives to share data with Allied industry and research partners will be encouraged and strengthened, as appropriate. To achieve success, data sharing must transcend operational silos and build on the willingness to share of established communities. It must be driven by intended uses of the data that support Allied policies and strategies, while respecting NATO’s Principles of Responsible Use of AI and data. In particular, it is vital to stimulate cooperation on sharing training data for realising the Alliance’s data exploitation and AI ambitions, for supporting Allied innovation initiatives (e.g. DIANA and the NATO Innovation Fund), and for strengthening the Alliance’s position vis-à-vis strategic competitors. As result, an Alliance Data Sharing Ecosystem will be established, where data from Allies, the NATO Enterprise, and industry and research partners, as appropriate, is shared, labelled, connected and exploited.