- From: Chris Lilley <chris@w3.org>
- Date: Mon, 19 Feb 2007 22:23:58 +0100
- To: Bert Bos <bert@w3.org>
- Cc: Bjoern Hoehrmann <derhoermi@gmx.net>, www-style@w3.org
On Monday, February 19, 2007, 5:18:15 PM, Bert wrote: BB> On Friday 12 January 2007 16:35, Paul Nelson (ATC) wrote: >> Any data outside the range of valid Unicode is not defined. To be >> consistent with handling bad UTF-8, we should probably specify >> changing it into the replacement character. >> >> Paul >> >> -----Original Message----- >> From: www-style-request@w3.org [mailto:www-style-request@w3.org] On >> Behalf Of Bjoern Hoehrmann Sent: Friday, January 12, 2007 6:52 AM >> To: www-style@w3.org >> Subject: [CSS21] out of range unicode escapes >> >> >> Hi, >> >> The current CSS 2.1 draft does not address handling of Unicode >> escapes that appear to be above U+10FFFF like \FFFFFF. Such a >> sequence could be interpreted as 5-digit escape followed by 'F', or >> be considered invalid, or handled as if it was the replacement >> character \FFFD, or in other ways. Implementations do not agree on >> how to handle this case. BB> The CSS WG discussed the issue and decided only on the principle that a BB> UA that displays the character in any way *should* display some visible BB> symbol, similar to how it should handle legal characters for which no BB> font is available. BB> The next draft will contain this paragraph at the end of the 3rd bullet BB> in 4.1.3 : BB> If the number is outside the range allowed by Unicode (e.g., BB> "\110000" is above the maximum 10FFFF allowed in current Unicode), BB> the UA may replace the escape with the "replacement character" BB> (U+FFFD). If the character is to be displayed, the UA should show a BB> visible symbol, such as a "missing character" glyph (cf. 15.2, point BB> 5). BB> Please let us know if this solves the issue. BB> [For reference: we put this issue in the planned "disposition of BB> comments" document as "issue 19."] If you copy a section of text which includes this 'missing glyph' and paste the characters into a text editor, what character do you get there? -- Chris Lilley mailto:chris@w3.org Interaction Domain Leader Co-Chair, W3C SVG Working Group W3C Graphics Activity Lead Co-Chair, W3C Hypertext CG
Received on Monday, 19 February 2007 21:24:12 UTC