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Where do we say that processing-instructions are ignored #445
In err:XS0079 we say, that processing instructions are not allowed as siblings of implicit inlines.
But: Where do we say, that they have to be ignored in all other places? Both XMLCalabash and MorganaXProc do this, but I can not find this rule in the specs (neither 1.0 nor 3.0).
Hmmn, you're right. https://www.w3.org/TR/xml/#sec-pi does not explicitly say "Ignore unless you recognize the PI" (and that's how I've always understood a PI, I suppose everybody?)
So yes, maybe a little reminder in the spec about this (although probably superfluous)?