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2.2.1.1 ABNF Syntax for NSC Files

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The syntax of the .nsc file is defined by using augmented BNF (ABNF) grammar [RFC4234] as follows:

 nscfile = "[Address]" CRLF address-section "[Formats]" CRLF 
 formats-section
 address-section = optional-properties1 ip-address ip-port 
 optional-properties2
 ip-address = "IP Address" string-param 
 ip-port = "IP Port" integer-param
 formats-section = 1*( format [ description ] )
 format = "Format" 1*DIGIT *WSP "=" *WSP binary CRLF
 description = "Description" 1*DIGIT string-param
 optional-properties1 = [ name-prop ] [ version ] [ mcadapter ]
 name-prop = "Name" string-param
 version = "NSC Format Version" *WSP "=" *WSP "3.0" CRLF
 mcadapter = "Multicast Adapter" string-param
 optional-properties2 = [ ttl ] [ ecc ] [ logurl ] [ rollover ]
  [ split ] [ cache ] [ expire ] [ nbt ]
 ttl = "Time To Live" integer-param
 ecc = "Default Ecc" integer-param 
 logurl = "Log URL" string-param
 rollover = "Unicast URL" string-param
 split = "Allow Splitting" integer-param
 cache = "Allow Caching" integer-param
 expire = "Cache Expiration Time" integer-param
 nbt = "Network Buffer Time" integer-param
 string-param = *WSP "=" *WSP string CRLF
 integer-param = *WSP "=" *WSP integer CRLF
 integer = "0x" 8HEXDIG
 string = ( *VCHAR ) / binary
 binary = "02" encoded-block
 encoded-block = 12*encoded-char
 encoded-char = ALPHA / DIGIT / "{" / "}"

Additional rules for the "string" syntax element are as specified in section 2.2.1.2.

Additional rules for the "encoded-block" syntax element are as specified in section 2.2.1.3.