[imps] Standardizing "parse error" messages
Edward Z. Yang
edwardzyang at thewritingpot.com
Mon Jan 12 11:42:09 PST 2009
Henri Sivonen wrote:
> The problem with standardizing error messages is that it forbids
> competition by providing better error messages.
So, the desired end result of standardized error messages is that, if
you don't feel like providing better error messages, you can use
> For example, the Validator.nu HTML Parser maintains tokenizer state that
> is unnecessary for parsing per se but useful for error messages. (The
> particular bit of state is the source position of the ampersand when
> parsing something that might turn out to be a character reference.)
> I think the Validator.nu HTML Parser shouldn't be in violation of the
> spec for doing this, but also parsers that don't want to spend cycles
> for maintaining message-only state shouldn't be required to.
That's a good argument for not including it in the HTML5 spec. Still,
the location of "emit a Parse Error" in the HTML5 spec is perhaps the
most unambiguous way of specifying these parse errors. Maybe we just
publish an alternate version with error names?
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