ITU‐T's Technical Reports and Specifications 665 Figure 11 – Technical proposal for the integrated management of smart sustainable cities To complete the smooth realization of IMSSC, a set of theoretical foundation is needed, including meta‐models, fusion processing workflows, and sharing services. Meta‐models are aimed to implement the modelling of these information resources, including nodes, sensors, observations and events, demonstrating their capabilities in different aspects and providing the basis for capability enhancement. Workflows of information resource fusion processing are used to guide the implementation of capability enhancement. Service interfaces are intended for unified and efficient sharing of information, offering decision support for municipal authorities during emergencies. In the infrastructure, the meta‐models are the basis and premise for the fusion processing workflows and sharing services, including node metadata [b‐Chenh]; observation process metadata [b‐Cheng], [b‐Chenf], [b‐Hu], and [b‐OGCc]; observation metadata [b‐Di], [b‐ISO 19156], [b‐OGCd], and [b‐OGCg]; event metadata [b‐Fan], and [b‐OGCe], and model metadata [b‐Visconti]. The fusion processing workflows are means to enhance the capabilities of the information resources modelled by the meta‐models and shared by the sharing services, consisting of the technical specifications for fusing resources with toponym [b‐Smart], and maps separately [b‐Chanier]. The sharing service interface specifications [b‐Chenb] are ways to share and manage the modelling results of information resource and fusion processing results, composed of the data [b‐Chenc], [b‐Chend], [b‐Chene], and [b‐OGCa], as well as model, and event service interface specifications [b‐OGCb], and [b‐OGCf]. The organization of the theoretical foundation for the integrated management under the smart sustainable cities environment is described in Figure 12: