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#### 1.4.1 Notational Conventions

The following notational conventions are used throughout this document.

• Font Key |  |
• Modified BNF Syntax |  |
• Splicing in Modified BNF Syntax |  |
• Indirection in Modified BNF Syntax |  |
• Additional Uses for Indirect Definitions in Modified BNF Syntax |  |
• Special Symbols |  |
• Objects with Multiple Notations |  |
• Case in Symbols |  |
• Numbers (Objects with Multiple Notations) |  |
• Use of the Dot Character |  |
• NIL |  |
• Designators |  |
• Nonsense Words |  |