[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: What does //distinct-values(...) mean?
Hi Martin, But, but, but, ... I thought that // operates on nodes. The distinct-values function doesn't return nodes, does it? I thought it returns a sequence of strings. If so, then how can // operate on a sequence of strings? /Roger -----Original Message----- From: Martin Honnen martin.honnen@xxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Sent: Wednesday, April 8, 2020 8:25 AM To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: [EXT] Re: What does //distinct-values(...) mean? Am 08.04.2020 um 14:19 schrieb Costello, Roger L. costello@xxxxxxxxx: > Hi Folks, > > I executed this XPath query in Oxygen: > > //distinct-values(//Row[matches(Advertiser, 'TS3', 'i')]/Subscribers) > > The two slashes at the beginning were an accident. At the bottom of the screen Oxygen shows the matches. All of a sudden it showed 111,000 matches, then a moment later 438,000 matches, and then finally 525,946 matches. > > "Yikes!" I thought, "What is going on? There is supposed to be around 17 matches. How can there be half a million matches?" > > Then I saw the two slashes at the start. > > "Hmm, what is the meaning of two slashes preceding the distinct-values function?" I thought. > > So, I ask you: what is the meaning of two slashes preceding the distinct-values function? Why does its evaluation result in so many matches? // is short for /descendant-or-self::node()/ so //distinct-values(//Row[matches(Advertiser, 'TS3', 'i')]/Subscribers) is /descendant-or-self::node()/distinct-values(//Row[matches(Advertiser, 'TS3', 'i')]/Subscribers) meaning it returns distinct-values(//Row[matches(Advertiser, 'TS3', 'i')]/Subscribers) as many times as the document has any nodes selectable by /descendant-or-self::node().
|
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|