Re: pre-HTML5 and the BOM

From: Leif H Silli <>
Date: Fri, 13 Jul 2012 18:11:53 +0200

Another myth, e.g. in wikipedia, is that Unicode warns against the utf-8 bom, see the footnote


------- Opprinnelig melding -------
> Fra: Jukka K. Korpela <>
> Til:
> Sendt: 13/7/'12, 15:31
> 2012-07-13 16:12, Leif Halvard Silli wrote:
>> The kind of BOM intolerance I know about in user agents is that some
>> text browsers and IE5 for Mac (abandoned) "convert" the BOM into a
>> (typically empty) line a the start of the <body> element.
> I wonder if there is any evidence of browsers currently in use that have
> problems with BOM. I suppose such browsers existed, though I can't be
> sure. In any cases, for several years I haven't seen any descriptions of
> real-life observations, but there are rumors and warnings, and people
> get disturbed. Even reputable sites have instructions against using BOM:
> "When the BOM is used in web pages or editors for UTF-8 encoded content
> it can sometimes introduce blank spaces or short sequences of
> strange-looking characters (such as ). For this reason, it is usually
> best for interoperability to omit the BOM, when given a choice, for
> UTF-8 content."
> In reality, BOM surely helps rather than hurts, especially when a
> document is saved locally and HTTP headers are thereby lost. Authoring
> tools may have problems with it (and then again, some tools have
> problems with UTF-8 files that _lack_ BOM).
> Yucca
Received on Fri Jul 13 2012 - 11:17:49 CDT

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