Hi Fabrice and others
I have been breaking my head over this the last few days and cant get it right. I tried your suggestion, but that does not work either. I have made the data available for testing and added a question on Stack Overflow. Anyone, feel free to help me out! [1] Thanks in advance! [1] http://stackoverflow.com/q/42673237/1150683 Van: Fabrice ETANCHAUD [mailto:[email protected]] Verzonden: maandag 6 maart 2017 9:14 Aan: Bram Vanroy <[email protected]>; 'BaseX' <[email protected]> Onderwerp: RE: [basex-talk] [XPTY0004] Item expected, sequence found Hello Bram, Sorry for the delay, It means there is more than one node element matching : ../node[ @rel="obj1" and @cat="np" ]/node[ @rel="mod" and @cat="pp" ]/node[ @rel="hd" and @pt="vz" ]/ You could make you request work by taking for example only the first @begin attribute : and number(@begin) < number( ( ../node[ @rel="obj1" and @cat="np" ]/node[ @rel="mod" and @cat="pp" ]/node[ @rel="hd" and @pt="vz" ]/@begin)[1]) ] But it may be meaningless with respect to your data. Hoping it will help, Best regards, Fabrice De : Bram Vanroy [mailto:[email protected]] Envoyé : vendredi 3 mars 2017 19:39 À : Fabrice ETANCHAUD <[email protected] <mailto:[email protected]> >; 'BaseX' <[email protected] <mailto:[email protected]> > Objet : RE: [basex-talk] [XPTY0004] Item expected, sequence found Good evening Fabrice I have tried what you suggested, and indeed: when I replace the first block the script works fine, and when I replace the second it does not. But Im not sure what this means, or how I can solve this in XPath? (Im sorry, I really am not good with XPath and XQuery.) I dont know if this is relevant, but when I try the query with one slash in the front instead of two, the script works fine as well. Thank you for the help so far! Van: Fabrice ETANCHAUD [mailto:[email protected]] Verzonden: vrijdag 3 maart 2017 16:30 Aan: Bram Vanroy <[email protected] <mailto:[email protected]> >; 'BaseX' <[email protected] <mailto:[email protected]> > Onderwerp: RE: [basex-talk] [XPTY0004] Item expected, sequence found Hello Bram, Sorry I mean it might not be xquery related, but xml related (in your dataset). Maybe running a modified version of your script twice, Replacing separately each bold statement below with and count(../node[ @rel="obj1" and @cat="np" ]/node[ @rel="mod" and @cat="pp" ]/node[ @rel="hd" and @pt="vz" ]/@begin) > 1 Will help you identify where you have more than one matching element ? Best regards, Fabrice //node[ @cat="pp" and node[ @rel="hd" and @pt="vz" and number(@begin) < number( ../node[ @rel="obj1" and @cat="np" ]/node[ @rel="mod" and @cat="pp" ]/node[ @rel="hd" and @pt="vz" ]/@begin) ] and node[ @rel="obj1" and @cat="np" and node[ @rel="mod" and @cat="pp" and node[ @rel="hd" and @pt="vz" and number(@begin) < number( ../node[ @rel="obj1" and @cat="np" ]/node[ @rel="mod" and @cat="pp" ]/node[ @rel="hd" and @pt="vz" ]/@begin) ] and node[ @rel="obj1" and @cat="np" and node[ @rel="mod" and @cat="pp" and node[ @rel="hd" and @pt="vz" ] ] ] ] ] ] De : Bram Vanroy [mailto:[email protected]] Envoyé : vendredi 3 mars 2017 12:52 À : Fabrice ETANCHAUD <[email protected] <mailto:[email protected]> >; 'BaseX' <[email protected] <mailto:[email protected]> > Objet : RE: [basex-talk] [XPTY0004] Item expected, sequence found Hi Fabrice thank you for the quick reply. Unfortunately I do not understand what you mean. I have queried other XPath codes with the number() function and the begin attribute without fault. However, it does seem to point in that direction as the error explicitly mentions that attribute: attribute begin {"6"}, Because other lines in the benchmark with the number() function and begin attribute do not throw this error, I do not know where to look. Van: Fabrice ETANCHAUD [mailto:[email protected]] Verzonden: vrijdag 3 maart 2017 12:33 Aan: Bram Vanroy <[email protected] <mailto:[email protected]> >; 'BaseX' <[email protected] <mailto:[email protected]> > Onderwerp: RE: [basex-talk] [XPTY0004] Item expected, sequence found Hi Bram >From what one can read there : http://docs.basex.org/wiki/XQuery_Errors It seems to me that number() function could be called with a sequence of @begin. There might be a place in your query where multiple node elements are returned, leading to a node/@begin sequence. Best regards, Fabrice De : [email protected] <mailto:[email protected]> [mailto:[email protected]] De la part de Bram Vanroy Envoyé : vendredi 3 mars 2017 12:19 À : 'BaseX' <[email protected] <mailto:[email protected]> > Objet : [basex-talk] [XPTY0004] Item expected, sequence found Hi BaseX peeps Im running BaseX 8.6.1 on Windows, and Im running into an issue I cant explain. I am using BaseX to run some benchmarks. As a benchmark I am running different XPath structures to match on the same database. In other words, in a file of a hundred lines each line is an XPath structure, and with Perl I query each line and measure the time it takes. Simple enough, right? The strange thing is that my script runs fine but it crashes on line 17, which is this XPath code: //node[@cat="pp" and node[@rel="hd" and @pt="vz" and number(@begin) < number(../node[@rel="obj1" and @cat="np"]/node[@rel="mod" and @cat="pp"]/node[@rel="hd" and @pt="vz"]/@begin)] and node[@rel="obj1" and @cat="np" and node[@rel="mod" and @cat="pp" and node[@rel="hd" and @pt="vz" and number(@begin) < number(../node[@rel="obj1" and @cat="np"]/node[@rel="mod" and @cat="pp"]/node[@rel="hd" and @pt="vz"]/@begin)] and node[@rel="obj1" and @cat="np" and node[@rel="mod" and @cat="pp" and node[@rel="hd" and @pt="vz"]]]]]] Admittedly, its quite a long string, but I dont see anything wrong with it and I dont think the error lies in the XPath. The full trace is like follows: [XPTY0004] Item expected, sequence found: (attribute begin {"6"}, ...). at C:\xampp\htdocs\grinding\BaseXClient.pm line 213. at C:\xampp\htdocs\grinding\BaseXClient.pm line 213. Query::exc("\x{5}", 133) called at C:\xampp\htdocs\grinding\BaseXClient.pm line 177 Query::execute(Query=HASH(0x3adac40)) called at SonarBenchNew.pl line 249 main::query_sonar("for \$node in db:open(\"WRPEE0000000treebank\")/treebank//node[\@"...) called at SonarBenchNew.pl line 176 main::loop_databases(ARRAY(0x31a2ae0), "//node[\@cat=\"pp\" and node[\@rel=\"hd\" and \@pt=\"vz\" and number(\@"...) called at SonarBenchNew.pl line 140 main::regular_sonar("//node[\@cat=\"pp\" and node[\@rel=\"hd\" and \@pt=\"vz\" and number(\@"...) called at SonarBenchNew.pl line 110 I have found that the XPTY0004 error is often caused by an order-by clause in XQuery but I dont have that. The full XQuery for the XPath is as follows: for $node in db:open("WRPEE0000000treebank")/treebank//node[@cat="pp" and node[@rel="hd" and @pt="vz" and number(@begin) < number(../node[@rel="obj1" and @cat="np"]/node[@rel="mod" and @cat="pp"]/node[@rel="hd" and @pt="vz"]/@begin)] and node[@rel="obj1" and @cat="np" and node[@rel="mod" and @cat="pp" and node[@rel="hd" and @pt="vz" and number(@begin) < number(../node[@rel="obj1" and @cat="np"]/node[@rel="mod" and @cat="pp"]/node[@rel="hd" and @pt="vz"]/@begin)] and node[@rel="obj1" and @cat="np" and node[@rel="mod" and @cat="pp" and node[@rel="hd" and @pt="vz"]]]]]]let $sentid := ($node/ancestor::alpino_ds/@id)let $sentence := ($node/ancestor::alpino_ds/sentence)let $tb := \'WRPEE0000000treebank\' return <match>{data($sentid)}||{data($sentence)}||{data($tb)}</match> I dont know if you guys can give me directions solely based on this. But if you could point me to a likely cause, e.g. input OR database contents, that would be great. Thanks in advance! Bram Vanroy https://bramvanroy.be
