The names of any variables, global functions, objects, or styles you create with PlanetPress Talk must meet the following requirements:
Names must be unique (no two elements in a document can have the same name).
Names cannot begin with a number, and can contain only the following ASCII characters: underscore, upper and lower case letters of the alphabet, all digits 0 through 9. If you use an underscore in the name, it should not appear as either the first or last character of the name as this may cause internal conflicts in the software.
Names can be a maximum of 50 characters in length.
PlanetPress Talk variable and command names are reserved words; you cannot use any of these reserved words as a name.
It is always recommended that you choose a name that reflects the content or purpose of the element you are creating. A meaningful name makes it easier to distinguish one element from another, and thus makes a document easier to maintain.