BaseX-Talk April 2024

basex-talk@mailman.uni-konstanz.de

13 participants
9 discussions

BaseX 9.6: The Summer Edition
by Christian Grün 28 Nov '24

28 Nov '24

Dear all, We provide you with a new and fresh version of BaseX, our open source XML framework, database system and XQuery 3.1 processor: https://basex.org/ Apart from our main focus (query rewritings and optimizations), we have added the following enhancements: XQUERY: MODULES, FEATURES - Archive Module, archive:write: stream large archives to file - SQL Module: support for more SQL types - Full-Text Module, ft:thesaurus: perform Thesaurus queries - Fulltext, fuzzy search: specify Levenshtein limit - UNROLLLIMIT option: control limit for unrolling loops XQUERY: JAVA BINDINGS - Java objects of unknown type are wrapped into function items - results of constructor calls are returned as function items - the standard package "java.lang." has become optional - array arguments can be specified with the middle dot notation - conversion can be controlled with the WRAPJAVA option - better support for XQuery arrays and maps WEB APPLICATIONS - RESTXQ: Server-Timing HTTP headers are attached to the response For a more comprehensive list of added and updated features, look into our documentation (docs.basex.org) and check out the GitHub issues (github.com/BaseXdb/basex/issues). Have fun, Your BaseX Team

11 43

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

Issues with X11 display
by Graydon Saunders 30 Apr '24

30 Apr '24

Hello -- After upgrading to Fedora 40, I find that I can not run the BaseX GUI. This is against BaseX110-20240426.163243.zip or 10.7 17:28 bin % ./basexgui /home/graydon/bin/basex/basex/.basex: writing new configuration file. Exception in thread "main" java.awt.HeadlessException: No X11 DISPLAY variable was set, or no headful library support was found, but this program performed an operation which requires it, at java.desktop/java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:166) at java.desktop/java.awt.Window.<init>(Window.java:553) at java.desktop/java.awt.Frame.<init>(Frame.java:428) at java.desktop/java.awt.Frame.<init>(Frame.java:393) at java.desktop/javax.swing.JFrame.<init>(JFrame.java:180) at org.basex.BaseXGUI.splash(BaseXGUI.java:96) at org.basex.BaseXGUI.<init>(BaseXGUI.java:54) at org.basex.BaseXGUI.main(BaseXGUI.java:37) 17:23 bin % java -version openjdk version "21.0.2" 2024-01-16 OpenJDK Runtime Environment (Red_Hat-21.0.2.0.13-4) (build 21.0.2+13) OpenJDK 64-Bit Server VM (Red_Hat-21.0.2.0.13-4) (build 21.0.2+13, mixed mode, sharing) Various attempts to set DISPLAY have not been helpful. Trying to use OpenJDK 17 produced effectively the same error message at greater length. Anyone got any suggestions on how to fix this? Thanks! Graydon

4 4

Request and JSON parsing
by Günter Dunz-Wolff 26 Apr '24

26 Apr '24

Hi there, via RESTXQ I request a vectorstore. The response is an JSON-Object. For example: With the following curl: curl https://vector.io/query-data \ -H "Authorization: Bearer ABcFMGhetc" \ -d '{ "data": "Du hast dem Menschen ein so freies, herrliches und üppiges Leben bestimmt", "topK": 2, "includeVectors": false, "includeMetadata": true }' I'm getting this object: { "result" : [ { "id" : "ba02277", "score" : 0.9949091, "metadata" : {"genre":"ba","blatt":"1810-01","autor":"Kleist","titel":"Zoroaster.","link":"https://kleist-digital.de/etc","text":"freies, herrliches und üppiges Leben bestimmt."} }, { "id" : "ba01711", "score" : 0.8891792, "metadata" : {"genre":"ba","blatt":"1810-29","autor":"Ompteda","titel":"Fragmente","link":"https://kleist-digital.de/etc","text":"So mit dem Menschen im Moralischen."} } ] } 1. Is the request in my RESTXQ in the right form? http:send-request( <http:request method="post" href="{$prod:url}/query-data"> <http:header name="Authorization" value="Bearer {$prod:token}"/> <http:body media-type="application/json"> {{ "data": "{$query}", "topK": 20, "includeVectors": false, "includeMetadata": true }} </http:body> </http:request> ) 2. I'm getting a full Object (but I dont know, if its the raw JSON-Object like above), but I am not able, to parse it, to get a list in html. In the documentation https://docs.basex.org/wiki/JSON_Module is an example: let $input := '{ "Title": "Drinks", "Author": [ "Jim Daniels", "Jack Beam" ] }' let $data := json:parse($input, map { 'format': 'xquery' }) return map:for-each($data, function($k, $v) { $k || ': ' || string-join($v, ', ') }) But my Object is more complex and I don't know, how to get two and more datasets with $k and $v out of the object. I want to have the following list: <div> <li> <ul> <li>Score: result score</li> <li>Blatt: result blatt</li> <li>Autor: result autor</li> <li>Titel: result titel</li> <li>Text: result text</li> <li>Link: result link</li> </ul> </li> <ul> <li></li> </ul> etc. </div> Thanks for any help Günter

3 5

Performance issue with BaseX CLI
by ANDRADE Antonio 22 Apr '24

22 Apr '24

Hie, For the purposes of European Water Framework Directive reporting, I compared the performances of the Saxon and BaseX XQuery engines. I observe a performance gap of a factor of 100 to 200 depending on the use case (see functions test_xquery_monitoring() and test_xquery_multischema_2022() in scripts test_saxoncee.py and test_basex.sh available at https://outil-transferts.ofb.fr/?107ae461a144d0b) Can you please help me understand the reasons for such gaps ? Thanks in advance, Antonio Andrade Date engineer

5 9

file:path-to-native() throws an error if its argument does not exist
by Imsieke, Gerrit, le-tex 22 Apr '24

22 Apr '24

I have a file:// URI that corresponds to a directory that I need to create (using svn mkdir, therefore file:create-dir() is not an option here) if it doesn’t exist. Calling file:path-to-native() on it results in a file:not-found error. Is there a fundamental reason why the file needs to exist before transforming its URI into the OS-native representation? Using BaseX 10.7. Gerrit

3 3

.xar deployment
by Régis WITZ 11 Apr '24

11 Apr '24

Hi all, I'm kind of a XQuery noob, but I'm guilty of the creation of a little BaseX module, Heimdall (10.5281/zenodo.10638084 <https://zenodo.org/records/10638084>). It's automatically built, unit tested and documented using GitLab CI. All build results, including the .xar file, are hosted using GitLab Pages. Thus, the module .xar archive is available here : |https://datasphere.gitpages.huma-num.fr/heimdall/xquery/heimdall.xar| <https://datasphere.gitpages.huma-num.fr/heimdall/xquery/heimdall.xar>. As you see, all this is hosted in Huma-Num's self-hosted GitLab instance (Huma-Num is a french research infrastructure). However, this mail is /not/ (just) a shameless plug. My issue is that I cannot install my .xar directly with |REPO INSTALL| : 1. I cannot install it with the CLI: basex -c"<repo-install path='https://datasphere.gitpages.huma-num.fr/heimdall/xquery/heimdall.xar'/>" [repo:not-found] Package 'https://datasphere.gitpages.huma-num.fr/heimdall/xquery/heimdall.xar' not found. Things are perfectly fine with for example the functx package : |basex -c"<repo-install path='https://files.basex.org/modules/expath/functx-1.0.xar'/>"| 2. For gigs, I tried to change the protocol from HTTPS to HTTP, and here is the error that I get : basex -c"<repo-install path='http://datasphere.gitpages.huma-num.fr/heimdall/xquery/heimdall.xar'/>" [repo:parse] heimdall.xar: Resource "expath-pkg.xml" not found.. So, maybe there is a problem with my expath-pkg.xml file ? I didn't find any -but, as I said, I'm no pro. If needed, here is the file that is wrapped in the .xar : https://gitlab.huma-num.fr/datasphere/heimdall/xquery/-/raw/main/expath-pkg… <https://gitlab.huma-num.fr/datasphere/heimdall/xquery/-/raw/main/expath-pkg…> 3. However, when I download my .xar file from the URL, and then REPO INSTALL it using the local path, stuff works fine : wget --no-check-certificate https://datasphere.gitpages.huma-num.fr/heimdall/xquery/heimdall.xar basex -c"<repo-install path='./heimdall.xar'/>" basex -c"<repo-list />" Name Version Type Path --------------------------------------------------------------------------- http://heimdall.huma-num.fr 2.1 EXPath http-heimdall.huma-num.fr-2.1 1 package(s). So I suppose the problem /might/ not be within the .xar itself, but the way it is hosted ? Maybe REPO INSTALL doesn't like my disturbing lack of SSL certificate ? I tried to search for some clue, but didn't find any clue in the documentation <https://docs.basex.org/wiki/Repository>. Maybe I'm blind, maybe that's not the problem at all. It's not exactly a blocking issue, but my noobiness regarding the basex ecosystem (and xquery in general) prevents me to understanding what happens, my README contains false info, and I'm not at ease with that. If someone had any intel, I'd be thankful. If needed, here is the repository : https://gitlab.huma-num.fr/datasphere/heimdall/xquery/ <https://gitlab.huma-num.fr/datasphere/heimdall/xquery/> And here is the corresponding issue (in French, sorry) : https://gitlab.huma-num.fr/datasphere/heimdall/xquery/-/issues/1 <https://gitlab.huma-num.fr/datasphere/heimdall/xquery/-/issues/1> Have a nice day, sunshine, flowers and all, Régis

4 3

some eq versus =
by Leo Studer 10 Apr '24

10 Apr '24

Hello are the following queries equivalent? 1. //city[some $city in following::city satisfies string(.) eq string($city)] 2. //city[. = following::city ] Thanks in advance, Leo

3 4

Single command expected
by Ветошкин Владимир 08 Apr '24

08 Apr '24

2 2

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BaseX-Talk April 2024