Subject: [xsl] XPath expression which expresses sequence-extended = (sequence, item) From: "Costello, Roger L. costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Tue, 21 Nov 2017 18:51:10 -0000 |
Hi Folks, Consider this XML: <sequences> <sequence> <item>A</item> </sequence> <sequence> <item>A</item> <item>B</item> </sequence> </sequences> Suppose that $sequence-extended has this value: <sequence> <item>A</item> <item>B</item> </sequence> And $sequence has this value: <sequence> <item>A</item> </sequence> And $item has this value: <item>B</item> I want an XPath expression which expresses this: The $sequence-extended items equals the $sequence items plus $item. This XPath expression seems to work: $sequence-extended/item = ($sequence/item, $item) But, the XPath expression fails when $sequence is empty: <sequence/> And $sequence-extended has a single item: <sequence> <item>A</item> </sequence> And $item is: <item>A</item> What XPath 2.0 expression works in all cases? Note: I seek simplicity and plainness over efficiency and cleverness. /Roger
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