[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: #Announce published JXML schema, an XML schema forreprese
Michael Kay scripsit: > It seems rather odd that BOOLEAN should be an enumerated string rather > than an xs:boolean. xs:boolean is a rather irritating type, a relic of the SGML days when the cost of a document was measured in keystrokes, making "true" four times more expensive than "1" and "false" five times more than "0". I suppose an appropriate restriction of xs:boolean (is that even possible?) would be better. > You need to say whether strings are held in JSON format (with > backslashes) or are unescaped. You're damned if you do, damned if you > don't: if you try to do unescaping then you hit the nastiness that JSON > can contain \0 which can't be represented directly in XML. I think the best approach is to directly represent every character except #x0-#x8, #xB-#x1F, \, #xFFFE, and #xFFFF, and escape them with JSON escaping. A disputed case is escaped unpaired surrogates in JSON strings: is "a\ud800b" is a valid JSON string? Crockford says it's valid, following the model of JavaScript strings, which are really sequences of arbitrary integers between 0 and 65535. I say that RFC 4627 rules them out, saying "A string is a sequence of zero or more Unicode characters", even if Crockford did not intend that interpretation when he wrote the RFC. > We're working on parse-json() and serialize-json() for XSLT 3.0 right > now. At present we're converting to new map/array data structures rather > than XML trees, but this could well be an alternative. Sounds like a good idea to me. The IBM DataPower convention is pretty good too: it does not have a "member" element, but instead puts the name associated with each value of an object in @name of the object itself, thus: JSON: {"answer" : 43} xmlsh: <object><member name="answer"><number>43</></></> DataPower: <object><number name="answer">43</></></> -- I don't know half of you half as well John Cowan as I should like, and I like less than half cowan@ccil.org of you half as well as you deserve. http://www.ccil.org/~cowan --Bilbo
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