The export/import format for parts is .xml but sometimes a librarian likes to check data content using Excel spreadsheets. This is possible by a simple copy/paste action.
This is an example of how to copy all the existing wire parts.
Open Component Maintenance (CM) and have a blank Excel spreadsheet ready
On the bottom panel of the CM window, select Group Name: Wire and click on the Search button
This will populate the top panel with the results of the search query
Select any row on the top panel and press Ctrl+A to select all rows. They should all highlight in blue:
Press Ctrl+C to copy all rows
In your Excel spreadsheet, do a Ctrl+V and it should paste all the rows