[xquery-talk] xquery 3.1 wishlist

[daniela florescu]

David, Ken…

You know the XPath/XSLT side of the story.

I know the OTHER side: the XML Query Language Working Group side of the story
(and the two haven’t been integrated until much later..)

For a simple path expression sequences might have come natural.

For a FULL QUERY LANGUAGE,  with nested queries, sorts, groupbys etc. this wasn’t a “natural” or “simple” decision AT ALL.

We pondered over this decision for about two years …..

…. and this was BEFORE the XML Query Working Group decide to use XPath for navigation.

Best
Dana







> On Jun 26, 2015, at 8:52 AM, David Carlisle <davidc at nag.co.uk> wrote:
> 
> On 26/06/2015 16:33, W.S. Hager wrote:
>> Sorry, what I meant is: how did sequences come into XPath? Was it
>> borrowed from another system or did it appear first in XPath?
> 
> It's a modification of the node set datatype introduced in xpath 1
> (which didn't have sequences) Xpath 1 didn't have a type corresponding
> to a node (or item) only node set, so treating a single item as the same
> as a set of size 1 was more or less a requirement (and a very elegant
> ruse:-)
> 
> David
> 
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