Comments on: Unicode in Java: not so fast (but XML is better)! http://www.orbeon.com/blog/2006/06/10/unicode-in-java-not-so-fast/ XForms Everywhere Fri, 29 Aug 2008 23:45:46 +0000 http://wordpress.org/?v=1.5.1.3 by: Erik Bruchez http://www.orbeon.com/blog/2006/06/10/unicode-in-java-not-so-fast/#comment-537 Mon, 12 Jun 2006 23:07:00 +0000 http://www.orbeon.com/blog/2006/06/10/unicode-in-java-not-so-fast/#comment-537 Alex, I have updated the post a little bit to clarify some things, but here are more details. A "surrogate code point" is a "Unicode code point in the range U+D800 through U+DFFF." Those are shown in gray in the image, and they are reserved for UTF-16 encoding. A surrogate pair is a pair of two 16-bit values, each being a surrogate code point, that together identify a single character. There is no "surrogate counts": the sentence just means that a "surrogate [pair]" should be counted as a single character in XPath. Finally, a plane is "a range of 65,536 [...] contiguous Unicode code points". There are 17 planes in Unicode. Plane 0 is the Basic Multilingual Plane (BMP). The Unicode glossary (http://www.unicode.org/glossary/) is quite useful to answer these questions. -Erik Alex,

I have updated the post a little bit to clarify some things, but here are more details.

A “surrogate code point” is a “Unicode code point in the range U+D800 through U+DFFF.” Those are shown in gray in the image, and they are reserved for UTF-16 encoding.

A surrogate pair is a pair of two 16-bit values, each being a surrogate code point, that together identify a single character.

There is no “surrogate counts”: the sentence just means that a “surrogate [pair]” should be counted as a single character in XPath.

Finally, a plane is “a range of 65,536 […] contiguous Unicode code points”. There are 17 planes in Unicode. Plane 0 is the Basic Multilingual Plane (BMP).

The Unicode glossary (http://www.unicode.org/glossary/) is quite useful to answer these questions.

-Erik

]]> by: Alessandro Vernet http://www.orbeon.com/blog/2006/06/10/unicode-in-java-not-so-fast/#comment-536 Mon, 12 Jun 2006 20:22:40 +0000 http://www.orbeon.com/blog/2006/06/10/unicode-in-java-not-so-fast/#comment-536 And Erik, what are surrogate code points, surrogate pairs, and surrogate counts? Alex And Erik, what are surrogate code points, surrogate pairs, and surrogate counts?

Alex

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