Backus-Naur Form (BNF) Definition

Quartus^® Prime Help uses the Backus-Naur Form (BNF) to define the syntax of the text file formats and message variables. BNF uses the following notation:

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Characters	Meaning
`::=`	"Is defined as"
`<...>`	Identifiers (that is, variables)
`[...]`	Optional items
`{...}`	Repeated items (zero or more times)
`(...)`	Grouped items
`...\|...`	Indicates a choice between items
`:n:n`	Suffix indicates a range (for example, <`name_char`>:1:8 means "from 1 to 8 name characters")
`Courier font`	Literal text in syntax descriptions. `Courier` font is used to help distinguish literal text from `italic variables` in syntax descriptions.