On Wed, Dec 29, 2021 at 12:21 AM Martin Honnen
martin(_dot_)honnen(_at_)gmx(_dot_)de <
xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Am 29.12.2021 um 00:32 schrieb Dimitre Novatchev
dnovatchev(_at_)gmail(_dot_)com:
Hit Send too early:
Do notice: this seems the only solution of all presented so far, that
preserves the original sequence order (not document order) of the nodes.
Why is the original sequence order preserved?
https://www.w3.org/TR/xpath-functions/#func-distinct-values clearly says
"The function returns the sequence that results from removing from $arg all
but one of a set of values that are considered equal to one another. [...]
The order in which the sequence of values is returned is ·
implementation-dependent·
<https://www.w3.org/TR/xpath-functions/#implementation-dependent>.
Which value of a set of values that compare equal is returned is ·
implementation-dependent·
<https://www.w3.org/TR/xpath-functions/#implementation-dependent>."
So while
$nodes ! generate-id(.)
gives you the generated ids in the order of the nodes in $nodes after the
call to distinct-values there is no order defined, it is implementation
dependent.
@Martin Honnen <Martin(_dot_)Honnen(_at_)gmx(_dot_)de> Could you, please, give
us an example
of an existing XPath engine whose implementation of `distinct-values()`
produces its results in any other order than their original order in the
input sequence?
Cheers,
Dimitre
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Cheers,
Dimitre Novatchev
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