Entry Id Delimiter Use this text box to specify the ID Delimiter, which separates entry Id from entry description in the Input SAS Data Set. The default delimiter is double forward slash "//", which is used by Affymetrix in its Annotation file. To Specify a Different Delimiter: Highlight the default delimiter in the text box. Type the new delimiter over the default delimiter. If you change your mind and would like to reset the field, click Clear.