If you have the rights to do it, you can create and launch the validation of a standard list
You have got two ways of compiling your list: add items manually and importing a csv file
Please find here a sample of csv file that you can use for uploading your items: Standard list template.csv
After uploading a csv file, the Portal may ask you to choose versions. It may also highlight unrecognised items.
Once you click on 'next' the Portal will report the final results. If any, unrecognised items can be extracted in an Excel file.