Hi
I'm trying to understand how H.248 supports UTF-8 string properties. According to H.248 the string property is encoded as UTF-8 string.
UTF-8 encoding is defined by the following table:
Scalar Value 1st Byte 2nd Byte 3rd Byte 4th Byte 00000000 0xxxxxxx 0xxxxxxx 00000yyy yyxxxxxx 110yyyyy 10xxxxxx zzzzyyyy yyxxxxxx 1110zzzz 10yyyyyy 10xxxxxx 000uuuuu zzzzyyyy yyxxxxxx 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
I.e. all the character codes between x80 and xf7 need to be supported.
According to H.248 Annex B.2:
The ABNF in this section uses the VALUE construct (or lists of VALUE constructs) to encode various package element values (properties, signal parameters, etc.).
The VALUE is defined as follows:
VALUE = quotedString / 1*(SafeChar) SafeChar = DIGIT / ALPHA / "+" / "-" / "&" / "!" / "_" / "/" / "'" / "?" / "@" / "^" / "`" / "~" / "*" / "$" / "" / "(" / ")" / "%" / "|" / "." ALPHA = %x41-5A / %x61-7A ; A-Z / a-z DIGIT = %x30-39 ; 0-9 quotedString = DQUOTE *(SafeChar / RestChar/ WSP) DQUOTE RestChar = ";" / "[" / "]" / "{" / "}" / ":" / "," / "#" / "<" / ">" / "=" WSP = SP / HTAB ; white space SP = %x20 ; space HTAB = %x09 ; horizontal tab DQUOTE = %x22 ; " (Double Quote)
So I believe this excludes the x80-xff characters.
So the question is how to text encoding defined in Annex B to encode UTF-8 strings?
Thanks, Sasha