[Bug 9071] New: Handling of "[" in between-doctype-public-and-system-identifiers-state may not be ideal

http://www.w3.org/Bugs/Public/show_bug.cgi?id=9071

           Summary: Handling of "[" in between-doctype-public-and-system-
                    identifiers-state may not be ideal
           Product: HTML WG
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec bugs
        AssignedTo: dave.null@w3.org
        ReportedBy: excors@gmail.com
         QAContact: public-html-bugzilla@w3.org
                CC: ian@hixie.ch, mike@w3.org, public-html@w3.org


Currently "[" in between-doctype-public-and-system-identifiers-state is handled
like any other unrecognised character, and forces quirks mode.

Firefox appears to have special-casing for "[" here. Compare (in Firefox 3.6
with html5.enable off):

http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!doctype%20html%20public%20%22%22%20[!%22%C2%A3%24%25^%26*%28%29{}[]%3E%0A
- "CSS1Compat"

http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!doctype%20html%20public%20%22%22%20!%22%C2%A3%24%25^%26*%28%29{}[]%3E%0A
- "BackCompat"

HTML5's behaviour breaks the positioning of the map in
http://www.freemanforman.co.uk/content/001_Area_Search/

But it also fixes the menu spacing and skip-link underlining in
http://symptomresearch.nih.gov/grantopportunities.htm

(These are the only two sites I found, out of half a million pages.)

Perhaps more data is needed to determine which behaviour results in less
breakage.


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Received on Thursday, 18 February 2010 16:42:18 UTC