>From my reading: it looks like the latest version of the spec has addressed
the "updating operations in closures" issue. Can we expect a BaseX
implementation soon :-)

/Andy



On Thu, Nov 22, 2012 at 2:40 PM, Christian Grün
<christian.gr...@gmail.com>wrote:

> Hi Daniel,
>
> > Doesn't it introduce performance problems though? If you do this copying
> with some bigger chunk of XML does it take the same amount of memory or is
> it somehow "delta" optimized?
>
> Yes; this is due to the specification, btw. Whatever you copy in your
> XQUF spec. is supposed to be cached before it is being evaluated.
>
> Regarding updating operations in closures: the current version of the
> spec. disallows updating operations, because it cannot be statically
> determined if a dynamic function invocation is an updating expression
> or not. See [1] for more details.
>
> Best,
> Christian
>
> [1] http://www.w3.org/TR/xquery-update-30/#id-dynamic-function-invocation
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