IDL documentation uses the following typefaces:
| Bold | Bold typeface indicates a literal item. Keywords and literal punctuation are represented in bold typeface. Identifiers used in a particular example are represented in bold typeface when mentioned in the text. |
| Italic | Italic typeface indicates a symbolic item for which you need to substitute a particular value. In IDL syntax descriptions, all identifiers that are not keywords are represented in italic typeface. |
| Constant width | Constant width typeface is used for source code examples (in IDL or in C) that are displayed separately from regular text. |