Directory and File Naming Rules

Some special characters are not allowed in the naming of the files. You can find the list of problematic characters and characters to avoid here. In rare cases for very large datasets with over half a million files, which may require sub-grouping of files, the file path may refer to a directory. Please contact us before submitting, if this is the case. When referring to a directory the file path must not end with a slash (it should be e.g. “/mysubmission/mysubdirectory”).

Please avoid trailing spaces (space character at the end of a file name), as we do not support them and trim trailing spaces in the file list.

Below is a list of allowed characters:

1. Any alphanumeric character (a-z | A-Z | 0-9)
2. Any of the following special characters !-_.*’()
   • Exclamation point (!)
   • Hyphen (-)
   • Underscore (_)
   • Period (.)
   • Asterisk (*)
   • Single quote (‘)
   • Open parenthesis ( ( )
   • Close parenthesis ( ) )