Associated .XSX software

Windows
XSX file extension
XML Schema Designer (Visual Studio) File
The .XSX file format is used by the 'XML Schema Designer' component of Visual Studio 2005 (to access this tool, go to Project > Add New Item > XML schema).
The .XSX file holds the layout information for components on the designer surface (the .xsd file).
The XML Schema Designer is a collection of tools for working with XML schemas within Visual Studio, an Integrated Development Environment (IDE) from Microsoft for developing applications for Windows or websites.