17602 2012-06-26 12:20:25 +0000 [XQ31] Type alias / define 2016-09-26 05:06:13 +0000 1 1 1 Unclassified XPath / XQuery / XSLT Requirements for Future Versions Working drafts PC Linux REOPENED P2 normal --- 1 john.snelson jim.melton jim.melton mike public-qt-comments oldest_to_newest 69404 0 john.snelson 2012-06-26 12:20:25 +0000 With the addition of higher order functions and the discussion around adding map values, SequenceTypes are becoming more and more complex - especially when building complex data structures from these types of values. We should add a type alias (or type definition) facility to allow complex SequenceType to be referred to with simple QNames, and to allow the definition of recursive types: declare type-alias my:transform-function as function($nodes as node()*, $params as map(*)) as item()*; 81061 1 jonathan.robie 2013-01-08 16:59:05 +0000 We discussed this in meeting #523 and decided this is a "may" requirement. <quote> Q2.9.17 Bugzilla Bug 17602, [XQ31ReqUC] Type alias / define See http://www.w3.org/Bugs/Public/show_bug.cgi?id=17602 may (for maps) </quote> 91423 2 jim.melton 2013-07-30 18:54:51 +0000 This bug has been redirected to the XQuery 3.1 document, as it has been accepted as a MAY requirement. 104495 3 jim.melton 2014-04-27 00:32:19 +0000 In their teleconference of 2014-04-22, the Working Group decided that this MAY requirement would not be satisfied in the XQuery 3.1 timeframe. As a consequence, I am marking the bug RESOLVED/LATER. 104496 4 jim.melton 2014-04-27 00:34:09 +0000 In their teleconference of 2014-04-22, the Working Group decided that this MAY requirement would be reconsidered for any future version of XQuery, should such future version materialize. As a consequence, I am recategorizing this bug as Requirements for Future Versions. 127527 5 mike 2016-09-26 05:06:13 +0000 See http://dev.saxonica.com/blog/mike/2016/09/tuple-types-and-type-aliases.html for a Saxon extension designed to meet this requirement