title: What is the wixpdb file for? Is it necessary for deployment?
body: <p>After building the installer, I'm provided a cab, msi, and wixpdb file. I've learned you can embed the cab using the <code>EmbedCab</code> property of the <code>MediaTemplate</code> element, but I've no idea about the wixpdb file. What's its purpose, and is it necessary for a basic installation?</p>