Internet Standards And Protocols Comments and Corrections (293110)

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Page 96: UTF-8 Clarification

On page 96, under the section titled UTF-8, the following corrections can be made to the first paragraph.

Change:
"Universal Transformation Format, 8-bit form (UTF-8) converts a 16-bit Unicode character into a series of from 2 to 5 bytes, with the lead byte detailing how many bytes follow. The number of bytes depends on the value of the particular Unicode character, and all characters with ASCII values (from 0 through 127) are represented in a single byte following the lead byte. UTF-8 is considered fairly efficient, but when searching for a particular character in the middle of a byte stream, one might have to parse backward up to 4 bytes in order to find the start of a character. UTF-8 is also reversible (just like UTF-7); the original Unicode data can be obtained by doing a reverse transformation."

To:
"Universal Transformation Format, 8-bit form (UTF-8) converts a 31-bit ISO 10646 character into a series of from 1 to 6 bytes, with the lead byte detailing how many bytes follow. The number of bytes depends on the value of the particular ISO 10646 character, and all characters with ASCII values (from 0 through 127) are represented in a single byte following the lead byte. UTF-8 is considered fairly efficient, but when searching for a particular character in the middle of a byte stream, one might have to parse backward up to 5 bytes in order to find the start of a character. UTF-8 is also reversible (just like UTF-7); the original ISO 10646 data can be obtained by doing a reverse transformation."

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