HTML decimal character rendering: Difference between revisions

Revision as of 23:18, 28 December 2010

Revision as of 09:19, 16 May 2011

Line 18:

* 127 (DEL character)

* 128 to 159 (C1 [[control characters]])

* 55296 to 57343 (xD800-xDFFFxD800–xDFFF, the [[UTF-16]] surrogate halves)

These characters are ''not even allowed by reference''. That is, you should not even write them as [[numeric character reference]]s. However, references to characters 128&ndash;159 are commonly interpreted by lenient web browsers as if they were references to the characters assigned to ''bytes'' 128&ndash;159 (decimal) in the [[ISO 8859-1|Windows-1252]] character encoding. This is in violation of HTML and SGML standards, and the characters are already assigned to higher code points, so HTML document authors should always use the higher code points. For example, for the trademark sign (™), use <code>&amp;#8482;</code>, not <code>&amp;#153;</code>.