The .x_t file extension is associated with Parasolid, a geometric modeling kernel. These files contain 3D solid model data in a text-based format. They are commonly used for exchanging CAD (Computer-Aided Design) data between different CAD systems. The Parasolid kernel is widely used in various CAD, CAM (Computer-Aided Manufacturing), and CAE (Computer-Aided Engineering) software packages. The .x_t format stores geometric information such as surfaces, solids, curves, and other topological data that defines the 3D model. The text-based nature of the format allows for easier inspection and modification compared to binary formats. It facilitates interoperability by providing a common data representation that can be interpreted by different software applications that support the Parasolid kernel. The .x_t files are crucial for collaborative design workflows, enabling engineers and designers to share and work on 3D models regardless of the specific CAD software they use. The format ensures that the geometric integrity of the model is maintained during the exchange process.