File and directory names

File and directory names must conform to the technical specification for the syntax of URLs, defined in RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax.

In particular, file and directory names must:

• only use alphanumeric characters (A to Z, a to z, 0 to 9), and the following characters: - _ . ! ~ * ’ ( )
• use the slash character / to separate hierarchical parts of a file path.

This ensures that file names can be easily referenced in URLs and are portable between operating systems.

Currently, the LTS web service is case-insensitive with regard to directory and file names.

Underscores in directory and file names are not recommended because:

• users can get confused between an underscore and a hyphen
• underlined text (hyperlinks, for example) frequently hides the underscore and users may assume that there is a space between the words in the directory or file name.

It is essential that developers adopt a consistent file naming convention and it is recommended that developers should use lower case for all directory or file names.