BaseX-Talk October 2020

basex-talk@mailman.uni-konstanz.de

15 participants
22 discussions

recursively used variables
by Rob Stapper 12 Aug '24

12 Aug '24

Hi, The code[1] below and send as attachment generates a error message: “Static variable depends on itself: $Q{http://www.w3.org/2005/xquery-local-functions}test”. I use these variables to refer to my private functions in my modules so I can easyly refer to them in a inheritance situation. It’s not a big problem for me but I was wondering if the error-triggering is justified or that it should work. [1]=========================================== declare variable $local:test := local:test#1 ; declare %private function local:test( $i) { if ( $i > 0) then $local:test( $i - 1) } ; $local:test( 10) =========================================== Kind regards, Rob Stapper Sent from Mail for Windows 10 -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

4 7

Autocomplete with RESTXQ
by Imsieke, Gerrit, le-tex 21 Jul '21

21 Jul '21

Hi List, Can anyone recommend a lightweight vanilla Javascript autocomplete library that can easily be used together with BaseX RESTXQ? Maybe even a readily cloneable/modifiable example? I don’t have a preference for a server response format. The RESTXQ service may be configured to return XML, JSON, or HTML No CORS restrictions need to be considered, the query host is the same that delivers the HTML pages. Gerrit

4 7

Package for system integration
by karlo＠fastmail.com 20 Jun '21

20 Jun '21

I have packaged basex in a way that I believe will be easier for integration with package managers. https://klarinet.kos.ovh/fossil/basex-root-install/uv/basex-9.4.3.tar.gz >From the root of that archive, you can build and install like this. make make install # as root The above will install to the prefix /usr/local. You can set a different prefix. Here is an example. make clean make PREFIX=/usr make PREFIX=/usr install # as root A secondary benefit of this package is the removal of the bash dependency. Could a package like this be distributed officially? If that is agreeable, I am happy to try incorporating this into the present build system. Here is a utility for preparing the package. It depends on sh and other Unix-like utilities. https://klarinet.kos.ovh/fossil/basex-root-install/dir?ci=tip With distinguished salutations, Kralj Karlo

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BaseX 9.4.2: Tweaks & Fixes
by Christian Grün 02 Apr '21

02 Apr '21

Dear all, We have released another 9.4 late-summer maintenance release with new performance tweaks and minor bug fixes: http://basex.org In addition, we have started a new Wiki article on XQuery optimizations, which we plan to extend step by step: https://docs.basex.org/wiki/XQuery_Optimizations We are looking forward to your feedback; have fun, Your BaseX Team

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Options for ft:search
by Sebastian Zimmer 15 Mar '21

15 Mar '21

Hi, I'd like to request a feature concerning the ft:search method: An `lserror` option that works exactly like the global option `LSERROR`. It would be nice if we could set the maximum Levenshtein distance specifically for each fuzzy search without having to adjust the global option. Another question on ft:search: Is there a reason why it doesn't have a `case` option just like ft:contains has one? Best regards, Sebastian

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archive:extract-text($archive, $entries) not returning all expected items
by James Ball 01 Nov '20

01 Nov '20

Hello, I’m getting unexpected results using the Archive module when extracting multiple entries in one call: archive:extract-text($archive,$entries) For example what I’m doing is taking an archive with, say, 1000 entries, selecting a subset of those, say 100, and then calling archive:extract-text with that subset. I’d expect to get 100 results but I get perhaps 97. I know that all the content is in the archive - if I try to extract one of the missing items directly it’ll be returned. It seems to be an issue asking for lots at once. Has anyone come across this? What is staring me in the face that I’m missing? I’ve put a small SSCE at the end of this message that shows the issue - I get something like this returned: "Entries found: 100 Number of content items returned (bulk): 97 Number of content items returned (individual): 100" Many thanks for any help. Regards, James Running BaseX 9.4, 9.4.3 on macOS. let $zipPath := "demo.zip" let $start := 0 let $number := 100 (: Create a zip file with 1000 entries - each entry being just a UUID as the same path :) let $uuids := (1 to 1000) ! random:uuid() let $zipOut := file:write-binary($zipPath,archive:create($uuids,$uuids)) (: Read the zip file :) let $archive := file:read-binary($zipPath) (: Get all the entries that meet the criteria - here based on position :) let $entries := archive:entries($archive)[$start < position() and position() <= $start+$number] let $count := count($entries) let $contents := archive:extract-text($archive,$entries) let $contents2 := for $entry in $entries return archive:extract-text($archive,$entry) return concat( "Entries found: ", count($entries), " Number of content items returned (bulk): ", count($contents), " Number of content items returned (individual): ", count($contents2) )

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Docker Image fails on initialization
by Moishy Uminer 22 Oct '20

22 Oct '20

Hi, I downloaded the basex/basexhttp docker image, and upon running docker run --name basexhttp basex/basexhttp:latest --publish 8984:8984 --volume "$HOME/basex/data":/srv/basex/data I received the following error message: /usr/local/bin/mvn-entrypoint.sh: exec: line 50: illegal option -- after which the container exits. Did I do something wrong (in which case I'll be happy to hear of my error), or is this a bug (in which case I'd appreciate it if this were fixed). Thanks in advance!

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Re: [basex-talk] BaseX-Talk Digest, Vol 130, Issue 13
by Rob Stapper 21 Oct '20

21 Oct '20

I see that my attachment is missing, so I'll try again. And for extra I'll drop the code her in the mail too. Here we go: ------------------------------------------------------------------------------ [1] "test.xqm" import module namespace BASE-TYPE = "BASE-TYPE" at "./BASE-TYPE.xqm" ; let $object := 12 return $object => $BASE-TYPE:method_1( ) -------------------------------------------------------------------------- [2] "BASE-TYPE.xqm" module namespace BASE-TYPE = "BASE-TYPE" ; import module namespace SUPER-TYPE = "SUPER-TYPE" at "./SUPER-TYPE.xqm" ; declare variable $BASE-TYPE:method_1 := BASE-TYPE:method_1#1 ; declare %private function BASE-TYPE:method_1( $i) { if ( $i > 0) then ( $i,( $i - 1) => $SUPER-TYPE:method_1( )) else () } ; ----------------------------------------------------------------------- [3] "SUPER-TYPE.xqm" module namespace BASE-TYPE = "SUPER-TYPE" ; import module namespace SUPER-TYPE = "SUPER-SUPER-TYPE" at "./SUPER-SUPER-TYPE.xqm" ; declare variable $BASE-TYPE:method_1 := BASE-TYPE:method_1#1 ; declare %private function BASE-TYPE:method_1( $i) { if ( $i > 0) then ( $i,( $i - 1) => $SUPER-TYPE:method_1( )) else () } ; ------------------------------------------------------------------------------------------------------------------------- [4] "SUPER-SUPER-TYPE.xqm" module namespace BASE-TYPE = "SUPER-SUPER-TYPE" ; import module namespace SUPER-TYPE = "BASE-TYPE" at "./BASE-TYPE.xqm" ; declare variable $BASE-TYPE:method_1 := BASE-TYPE:method_1#1 ; declare %private function BASE-TYPE:method_1( $i) { if ( $i > 0) then ( $i,( $i - 1) => $SUPER-TYPE:method_1( )) else () } ; -------------------------------------------------------------------------------------------------------------------------- Yes, the content of the module-files is identical except for the imported module-file. Best, Rob > Op 21-10-2020 12:00 schreef basex-talk-request(a)mailman.uni-konstanz.de: > > > Send BaseX-Talk mailing list submissions to > basex-talk(a)mailman.uni-konstanz.de > > To subscribe or unsubscribe via the World Wide Web, visit > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk > or, via email, send a message with subject or body 'help' to > basex-talk-request(a)mailman.uni-konstanz.de > > You can reach the person managing the list at > basex-talk-owner(a)mailman.uni-konstanz.de > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of BaseX-Talk digest..." > > > Today's Topics: > > 1. recursively used variables (Rob Stapper) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 20 Oct 2020 17:19:36 +0200 > From: Rob Stapper <r.stapper(a)lijbrandt.nl> > To: "basex-talk(a)mailman.uni-konstanz.de" > <basex-talk(a)mailman.uni-konstanz.de> > Subject: [basex-talk] recursively used variables > Message-ID: <aa8b70e7-12e7-11eb-8513-005056998788(a)smtp.kpnmail.nl> > Content-Type: text/plain; charset="utf-8" > > Hi, > > For those who follow this discussion and find it an interesting case, hereby an example of the problem I?m facing. > > The example throws an error: Static variable depends on itself: ?? > > The example concerns a 3-step cyclic construct: > ?BASE-TYPE.xqm? -> ?SUPER-TYPE.xqm? -> ?SUPER-SUPER-TYPE.xqm? -> ?BASE-TYPE.xqm?, > starting of from ?test.xq?. > > I need the solution to comply with four rules: > - The module-functions must be %private and may only be addressed from outside the module through a public module-$variable. This way inheritance between modules can simply be implemented by the use of variables. > - The internal structure of a module-function must be completely hidden for use outside the module. So if the module-function calls another function it is not allowed to pass this called upon function or its name in the module-function?s parameterlist. That is why I can?t use Leo solution here. > - The 3-step cycle structure can not be changed. > - I need a generic solution. > > The solution is of course that it just works; Christian is having a look at it, but I thought it an interesting enough case to share and maybe somebody comes up with an solution that does complies to these rules as a temporary ? work around. My solution for the time being is violating my first rule. > > Have fun, > Rob Stapper > > PS for using the example, just extract it and copy the extracted directory in BaseX?s src-directory. Start "test.xq? from within BaseX and it should work > > Sent from Mail for Windows 10 > > > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus >

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recursively used variables
by Rob Stapper 20 Oct '20

20 Oct '20

Hi, For those who follow this discussion and find it an interesting case, hereby an example of the problem I’m facing. The example throws an error: Static variable depends on itself: …… The example concerns a 3-step cyclic construct: “BASE-TYPE.xqm” -> “SUPER-TYPE.xqm” -> “SUPER-SUPER-TYPE.xqm” -> “BASE-TYPE.xqm”, starting of from “test.xq”. I need the solution to comply with four rules: - The module-functions must be %private and may only be addressed from outside the module through a public module-$variable. This way inheritance between modules can simply be implemented by the use of variables. - The internal structure of a module-function must be completely hidden for use outside the module. So if the module-function calls another function it is not allowed to pass this called upon function or its name in the module-function’s parameterlist. That is why I can’t use Leo solution here. - The 3-step cycle structure can not be changed. - I need a generic solution. The solution is of course that it just works; Christian is having a look at it, but I thought it an interesting enough case to share and maybe somebody comes up with an solution that does complies to these rules as a temporary 😉 work around. My solution for the time being is violating my first rule. Have fun, Rob Stapper PS for using the example, just extract it and copy the extracted directory in BaseX’s src-directory. Start "test.xq” from within BaseX and it should work Sent from Mail for Windows 10 -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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Re: [basex-talk] recursively used variables
by Rob Stapper 20 Oct '20

20 Oct '20

Hi Leo, Thank you for your reply. I’m aware of these kind of solutions, I use them frequently allthough I have to admit that these slipped my mind here. Great solutions by the way. But getting the code working is not my problem. What I’m looking for is a generic solution for some sort of inheritance mechanism( see attachment for an example). The code-snippet is just meant to supply the BaseX-team with an basic executable example of the bare issue. I’m not even sure if it is a bug because I don’t know if it is behavior by design. But now the BaseX-team is aware of the situation. Probably I should have said that the functions can be activated cyclically in stead of just recursively. Where cyclical can be interpret as indirect recursive. And in that case the solution doesn’t hold. Best, Rob Sent from Mail for Windows 10 From: Leo Studer Sent: Monday, October 19, 2020 7:19 PM To: Rob Stapper Subject: Re: [basex-talk] recursively used variables … and you do not even need the variable declare %private function local:test( $i, $test) { if ( $i > 0) then ($i, $test( $i - 1, $test)) else() } ; local:test( 10, local:test#2) Cheers Leo On 8 Oct 2020, at 14:17, Rob Stapper <r.stapper(a)lijbrandt.nl> wrote: Hi, The code[1] below and send as attachment generates a error message: “Static variable depends on itself: $Q{http://www.w3.org/2005/xquery-local-functions}test”. I use these variables to refer to my private functions in my modules so I can easyly refer to them in a inheritance situation. It’s not a big problem for me but I was wondering if the error-triggering is justified or that it should work. [1]=========================================== declare variable $local:test := local:test#1 ; declare %private function local:test( $i) { if ( $i > 0) then $local:test( $i - 1) } ; $local:test( 10) =========================================== Kind regards, Rob Stapper Sent from Mail for Windows 10 Virus-free. www.avast.com <test.xq> -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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BaseX-Talk October 2020