[SOLVED] How to encode RDF N-Triples string literals?

How to encode RDF N-Triples string literals?

The specification for RDF N-Triples states that string literals must be encoded.

https://www.w3.org/TR/n-triples/#grammar-production-STRING_LITERAL_QUOTE

Does this "encoding" have a name I can look up to use it in my programming language? If not, what does it mean in practice?

Solution

The grammar productions that you need are right in the document that you linked to:

[9] STRING_LITERAL_QUOTE    ::= '"' ([^#x22#x5C#xA#xD] | ECHAR | UCHAR)* '"'
[141s]  BLANK_NODE_LABEL    ::= '_:' (PN_CHARS_U | [0-9]) ((PN_CHARS | '.')* PN_CHARS)?
[10]    UCHAR   ::= '\u' HEX HEX HEX HEX | '\U' HEX HEX HEX HEX HEX HEX HEX HEX
[153s]  ECHAR   ::= '\' [tbnrf"'\]

This means that a string literal begins and ends with a double quote ("). Inside of the double quotes, you can have:

any character except: #x22, #x5C, #xA, #xD. Offhand, I don't know what each of those is, but I'd assume that they're the space characters covered in the escapes;
a unicode character represented with a \u followed by four hex digits, or a \U followed by eight hex digits; or
an escape character, which is a \ followed by any of t, b, n, r, f, ", ', and \, which represent various characters.