Subject: [xsl] Re: XPath expression that returns a sequence of pairs? From: "Chris Papademetrious christopher.papademetrious@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Tue, 17 Jan 2023 20:12:59 -0000 |
Hi Roger, I think sequences are always flattened, and so you would need arrays to do this (XSLT 3.0, XPath 3.1). Arrays can contain anything, including other arrays: https://www.saxonica.com/documentation12/#!expressions/xpath31arrays I've never used arrays, so I can't suggest code to try. - Chris -----Original Message----- From: Roger L Costello costello@xxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Sent: Tuesday, January 17, 2023 3:08 PM To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: [xsl] XPath expression that returns a sequence of pairs? Hi Folks, I have this XML document: <Track-History> <Track-ID>XYZ</Track-ID> <Observation> <Target-Latitude>10</Target-Latitude> <Target-Longitude>20</Target-Longitude> <Observer-Latitude>40</Observer-Latitude> <Observer-Longitude>50</Observer-Longitude> </Observation> <Observation> <Target-Latitude>15</Target-Latitude> <Target-Longitude>25</Target-Longitude> <Observer-Latitude>40</Observer-Latitude> <Observer-Longitude>50</Observer-Longitude> </Observation> </Track-History> I want an XPath expression that returns a sequence of (Target-Latitude, Target-Longitude) pairs; i.e., a pair for each <Observation> element. For the XML document shown above, the XPath should return this sequence: (10,20), (15,25) A count of the number of items in the sequence should yield: 2 The following XPath is not correct: for $i in //Observation return ($i/Target-Latitude, $i/Target-Longitude) A count of the number of items returned by that XPath yields: 4 Is there an XPath to do what I seek? /Roger
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