What is a .XADD file?
The .XADD file extension is associated with a type of file called an Expression Web Add-in. This kind of file is specifically used by a software program named Microsoft Expression Web. Microsoft Expression Web is a tool that was designed to help people create designs for web applications. Web applications are programs that run on a web browser, like a website that you can interact with.
An Expression Web Add-in file (.XADD) is essentially an add-on or extra piece of software that can be added to the Microsoft Expression Web program. These add-ons are used to introduce new features or components into the web applications that someone is developing. For example, an add-on might include new JavaScript components, which are pieces of code that can make web applications do more interesting things, like responding to user actions in real time.
The .XADD files are actually saved in a .ZIP format. This means that inside an .XADD file, there is a compressed (or "zipped up") collection of files. This is useful because it makes the add-on files smaller and easier to download or share, but you need the right software to open and use them.
To use an .XADD file, you would typically need Microsoft Expression Web, as it's the program these files are designed to work with. However, Microsoft has discontinued Expression Web, which means they no longer update or officially support this software. Despite this, if you already have Microsoft Expression Web installed on your computer, you can still use it to open and work with .XADD files. Since Microsoft Expression Studio includes Expression Web, it's also a program that can open these files, but keep in mind that it's also discontinued.
In summary, .XADD files are add-ons for Microsoft Expression Web, used to enhance web applications with new features. They are saved in a compressed format and require specific, though discontinued, software to open and use.
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