When working with file systems and browsers, certain file path characters are either forbidden or problematic. With ePublisher, you can use target settings and/or Filename markers to influence the file names generated in your published output. However, there are some characters that are considered invalid and ePublisher will not use them when creating output file names.

You don't need to worry or track the invalid characters, because ePublisher will automatically eliminate them from the output. In addition, any time an invalid character is attempted to be used to generate a file name, ePublisher will replace that character with a single '_' (underscore) character as a placeholder.

For example, if you had a heading paragraph that is attempting to generate a file name such as: Document (%25).html. The actual generated file name will be: Document (_25).html because the % character is a problematic character.

Aside: In URLs the % is a special character that is used to encode other characters, making it problematic to use this character as itself in URL paths.

"#$%&*+,/:;<=>?[\]|

Each occurrence of one of these characters will be replaced by a single _ (underscore) character.