30175 2017-09-04 15:09:33 +0000 [XP31] Examples of "?" operator for maps and arrays 2017-12-13 09:06:29 +0000 1 1 1 Unclassified XPath / XQuery / XSLT XPath 3.1 Recommendation PC All RESOLVED FIXED P2 editorial --- 1 andrew_coleman jonathan.robie public-qt-comments oldest_to_newest 128872 0 andrew_coleman 2017-09-04 15:09:33 +0000 Comment from Martin Honnen <martin.honnen@gmx.de> on public-qt-comments@w3.org See https://lists.w3.org/Archives/Public/public-qt-comments/2017Jul/0038.html The XPath 3.1 spec for the "?" lookup distinguishes between https://www.w3.org/TR/xpath-31/#id-unary-lookup and https://www.w3.org/TR/xpath-31/#id-postfix-lookup. The section about the unary lookup in the examples section gives some example which for me seem to examples of an unary lookup, but also three examples - $m?* - [1, 2, 5, 7]?* - [[1, 2, 3], [4, 5, 6]]?* which, for me, seem to be examples of the postfix lookup, as in $m?* we have a variable reference followed by "?*", in [1, 2, 5, 7]?* we have a https://www.w3.org/TR/xpath-31/#prod-xpath31-SquareArrayConstructor followed by "?*" and in the last example [[1, 2, 3], [4, 5, 6]]?* there is a further square array constructor followed by "?*". All these seem to originate from the grammar production [49] PostfixExpr ::= PrimaryExpr (Predicate | ArgumentList | Lookup)* Have I misread the grammar production rules or are the examples in the wrong section? 128873 1 andrew_coleman 2017-09-04 15:12:02 +0000 The Working Group agreed that this is an editorial bug and the proposed fix should be added to the XPath 3.1 errata document. 129010 2 andrew_coleman 2017-12-13 09:06:29 +0000 This has been resolved in the errata document: https://www.w3.org/XML/2017/qt-errata/xpath-31-errata.html#E4