.XCU File Extension
File TypeOpenOffice.org Configuration File
What is an XCU file?
File used by OpenOffice.org, an open source office productivity suite; contains configuration information for an add-on in an XML format; commonly used to configure OpenOffice.org office extensions.
XCU files can be included as part of an .OXT extension file. They define configuration information such as menu labels, default values for document templates, and other extension parameters.
NOTE: OpenOffice.org was replaced by Apache OpenOffice in 2012.