There is only one file type that uses the .XBD extension:
DocuWorks Binder File
An XBD file contains one or more DW documents created by DocuWorks, a program used to manage documents and improve business workflow. It stores a binder of documents and also includes metadata for each DW file.
Binders are used by DocuWorks to organize DW documents without losing any information about the DW document, such as the title, page numbers, and properties. You can also copy, rename, and reorder the DW documents in the XBD file.
To create an XBD binder, select, then set the binder size, color, and name. You can add DW documents to a binder simply by dragging and dropping the document into the binder.
You can use DocuWorks to view XBD files. You can also view the files using DocuWorks Viewer Light for Android and iOS.
Updated: May 18, 2017