On Tuesday 2014-10-14 05:26 +0100, Simon Sapin wrote: > >zwarich: On the web, is validity-checking for XML input required? > > I donβt have evidence either way (and the only way to find out might > be to try it), but it sounds unlikely that real content relies on an > entire document failing to parse.
Careful here: XML has two different concepts of document conformance: well-formedness (weaker) and validity (stronger). Browsers today check for well-formedness but do not check for validity. (Gecko certainly doesn't check for validity; I don't think others do either.) The XML spec distinguishes between validating processors (which have to check validity against a DTD) and non-validating processors. See http://www.w3.org/TR/xml/#sec-conformance and http://www.w3.org/TR/xml/#sec-terminology (esp. "fatal error", "validity constraint", "well-formedness constraint"). -David -- π L. David Baron http://dbaron.org/ π π’ Mozilla https://www.mozilla.org/ π Before I built a wall I'd ask to know What I was walling in or walling out, And to whom I was like to give offense. - Robert Frost, Mending Wall (1914)
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