You can export Reference Items to an XML file. You can choose to include the Topic and the Notes or not.
You can specify the output folder and the character encoding (e.g. UTF-8) of the exported file under Exports and Reports Preferences.
The file is saved in the folder specified within the user preferences (see Set-up). Current date and time are used to build the file name to make it unique. The output file is opened using the default system application for XML files.