[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: What is PI data exactly?
From: John Cowan > >> So if a PI has a target and data, what is the data in the following scenarios? >> >> <?Foo?> >> <?Foo ?> >> >> Is the first null data and the second a string of spaces? > >The first case is definitely null data. Production 16 says that >the optional data is prefixed by one or more whitespace characters >which are not part of it Are you reading the same spec as me? My version of production 16 doesn't mention "data" at all; all it says is that if there are characters after the PITarget, the first one must be white space. As it doesn't mention data, I don't see how it can tell me whether or not the white space is part of the data. Actually I think the notion of "data" in a PI is a SAX notion, not an XML one. Meta-comment: we're suddenly getting a spate of comments that point to little inconsistencies or ambiguities in the spec, reflecting the fact that it is written very informally. I think the problems are particularly acute when the spec tries to talk about the actions of "XML processors" or "applications" because these notions are very fuzzy. There's good scope for a researcher to add value by producing a formal spec of XML+SAX which tells me definitively which documents are well-formed, which are valid, and what the SAX calls will be for any given document (or non-document). Anyone who is spending time writing yet another XML parser would be adding a lot more value to the community if they spent their time on producing a formal specification instead. Mike Kay xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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