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Re: Numeric character references.

From: Martin Duerst <duerst@w3.org>
Date: Tue, 20 Aug 2002 11:34:46 +0900
Message-Id: <4.2.0.58.J.20020820112616.02f850d0@localhost>
To: maherb@brimworks.com, www-validator@w3.org

At 12:29 02/08/19 -0400, maherb@brimworks.com wrote:

>In the HTML 4.01 specification on this page,
>
>http://www.w3.org/TR/html4/charset.html#h-5.3.1
>
>describes numeric character references which are perfectly legal,
>however when validating with such numeric character reference, I
>recieve an error:
>
>  * Line 106, column 5:
>
>     &#151;foo bar<br>
>          ^

The validator is correct. Please have a look at
http://www.w3.org/TR/REC-html40/sgml/sgmldecl.html

This says:

     CHARSET
          BASESET  "ISO Registration Number 177//CHARSET
                    ISO/IEC 10646-1:1993 UCS-4 with
                    implementation level 3//ESC 2/5 2/15 4/6"
          DESCSET 0       9       UNUSED
                  9       2       9
                  11      2       UNUSED
                  13      1       13
                  14      18      UNUSED
                  32      95      32
                  127     1       UNUSED
                  128     32      UNUSED
                  160     55136   160
                  55296   2048    UNUSED  -- SURROGATES --
                  57344   1056768 57344

Please note the line
                  128     32      UNUSED
This says that 32 characters, starting from character number
128, are unused. The next usable character is 160.

This is because the numbers in numeric character refences
are taken from Unicode, and in Unicode, the characters from
128 to 159 are are control characters, which don't belong
into an HTML document.

What you probably wanted was the character EM DASH, represented
with byte 0x97 in windows-1252. For this, please use the
hexadecimal NCR &#x2014;, or its decimal equivalent.

Regards,    Martin.




>Error: reference to non-SGML character
>
>Thanks,
>-Brian
>
>
>--
>  Brian Maher    CS Major   WWU
>  BrimWorks.com  >> Glory to God <<
Received on Monday, 19 August 2002 23:30:42 GMT

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