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/usr/share/highlight/langDefs/n3.lang is in highlight-common 3.18-3build1.

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Description="Notation3 (N3), N-Triples, Turtle, SPARQL"

Keywords={
  { Id=4,
    Regex=[[@\w+|\^\^<[^>]+?>]],
  },
  { Id=1,
    Regex=[[<[!?]?(?!\-\-)\/?[\w\:\-\/\.\+\-\#\@\?\=\_\~\;\,\%\$\&]+>?|[/?]?>]],
    Group=0,
  },
  { Id=2,
    Regex=[[(\w+)\:]],
	Group=1,
  },
  { Id=3,
    Regex=[[\:(\w+)]],
	Group=1,
  },
  { Id=4,
	Regex=[[(?<!\?)\w+]],
  },
}

Strings={
  Delimiter=[["""|"]],
  RawPrefix="r",
  Escape="\\\\[ntvbrfa\\\\\\?'\"]|\\\\\\d{3}|\\\\x[[:xdigit:]]{2}|\\\\u[[:xdigit:]]{4}"
}

Comments={
  { Block=false,
    Delimiter= { [[#]] },
  },
}

Operators=[[\(|\)|\[|\]|\{|\}|\,|\;|\.|\:|\&|<|>|\!|\=|\/|\*|\%|\+|\-|\~|\|]]

IgnoreCase=true