What are the rules for creating an Application ID? What kinds of characters are allowed, and is there a length restriction?

The Application ID must begin with a letter and can contain only letters, numbers, and underscores. However, the first character of an application ID can only be alphabetic (NOT a numeric or underscore). There is no limitation on the number of characters that the Application ID can contain (no length restrictions). Alphabetic characters can be upper or lower case.

Some suggestions regarding how Application IDs should be created might be:
– add a identifying prefix for each customer if a single customer has many Applications
– add a suffix with the creation date
– keep the ID as brief as possible, but still efficient and easy to identify/intelligible.