September 2021 - BaseX-Talk - mailman.uni-konstanz.de

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

9.6 on Docker Hub
by Johannes Bauer 10 Jan '22

10 Jan '22

Hi, I cannot find the latest BaseX release on Docker Hub (only the 9.5 branch). Is this still planned? Thank you. Best Regards Johannes

3 4

Error running dba in Tomcat 9.0 with BaseX v. 9.5 and above
by Kim Galeazzi 04 Oct '21

04 Oct '21

Launching the dba application in BaseX 9.5 and above deployed on Tomcat 9.0 throws an error: Exception javax.servlet.ServletException: Servlet execution threw an exception org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) Root Cause java.lang.NoClassDefFoundError: org/eclipse/jetty/websocket/api/WebSocketAdapter java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClass(ClassLoader.java:760) java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2478) org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:870) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1371) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1215) org.basex.query.func.session.SessionFn.session(SessionFn.java:31) org.basex.query.func.session.SessionGet.value(SessionGet.java:17) org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) org.basex.query.expr.ParseExpr.ebv(ParseExpr.java:71) org.basex.query.expr.If.expr(If.java:181) org.basex.query.expr.If.iter(If.java:161) org.basex.query.scope.MainModule.iter(MainModule.java:97) org.basex.query.QueryContext.iter(QueryContext.java:326) org.basex.http.restxq.RestXqResponse.serialize(RestXqResponse.java:84) org.basex.http.web.WebResponse.create(WebResponse.java:66) org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:69) org.basex.http.BaseXServlet.service(BaseXServlet.java:65) javax.servlet.http.HttpServlet.service(HttpServlet.java:764) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) Root Cause java.lang.ClassNotFoundException: org.eclipse.jetty.websocket.api.WebSocketAdapter org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1407) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1215) java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClass(ClassLoader.java:760) java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2478) org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:870) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1371) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1215) org.basex.query.func.session.SessionFn.session(SessionFn.java:31) org.basex.query.func.session.SessionGet.value(SessionGet.java:17) org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) org.basex.query.expr.ParseExpr.ebv(ParseExpr.java:71) org.basex.query.expr.If.expr(If.java:181) org.basex.query.expr.If.iter(If.java:161) org.basex.query.scope.MainModule.iter(MainModule.java:97) org.basex.query.QueryContext.iter(QueryContext.java:326) org.basex.http.restxq.RestXqResponse.serialize(RestXqResponse.java:84) org.basex.http.web.WebResponse.create(WebResponse.java:66) org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:69) org.basex.http.BaseXServlet.service(BaseXServlet.java:65) javax.servlet.http.HttpServlet.service(HttpServlet.java:764) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) I tried adding the Ecplise websocket API jar to the lib folder without success. Any ideas? We rely on the RESTXQ for our implementations and find the dba web application very convenient for accessing the logs and managing the database. Thank you. [cid:image001.jpg@01D799B4.AF02AC70]<http://www.inspirage.com/> Kim Galeazzi | Manager, Solution Architecture, Oracle/Agile PLM Consulting Office: 408-680-8837<tel:%28408%29%20680-8837> | Mobile: 408-466-2121<tel:%28408%29%20466-2121> | Campbell, CA This email communication is considered business confidential and intended for the original recipient of this email only.

2 3

tail recursion not happening?
by Graydon Saunders 27 Sep '21

27 Sep '21

Hello -- Using BaseX 9.6.1 on Linux. So I'm trying to convert a compact-ish element pattern string, delimited with braces, back into something that looks like XML vocabulary for readability. (The pattern strings are being used to detect similar structure in the content set.) The test query (below) works fine. Stick the functions in a module namespace, and run the real content, and I get the "Stack Overflow: Try tail recursion?" error. (Query plan for this case attached.) Nothing in the real data should be all that large. I suspect I'm being too clever for my own good somehow, but if anyone can tell me specifically where I'd appreciate it. Thanks! Graydon ====== declare namespace fn = "http://www.w3.org/2005/xpath-functions"; declare variable $NMToken as xs:string := '[\p{L}\p{Nd}._\-:]+'; declare function local:tag($names as xs:string*,$active as xs:string*,$event as xs:string*) { let $do as xs:string := substring($event,1,1) return if (not(normalize-space($do))) then () else if ($do eq '{') then (concat('<',head($names),'>'), local:tag(tail($names),(head($names),$active),substring($event,2))) else (concat('</',head($active),'>'), local:tag($names,tail($active),substring($event,2))) }; declare function local:emitPattern($in as xs:string) as xs:string { let $chunked as element(fn:analyze-string-result) := analyze-string($in,$NMToken) let $names as xs:string+ := $chunked/fn:match/string() let $openClose as xs:string+ := $chunked/fn:non-match => string-join() return string-join(local:tag($names,(),$openClose)) }; let $pattern as xs:string := "{subblock{sublabel}{p}}" let $yikes as xs:string := "{primaryblock{shortdesc}{table{title}{tgroup{colspec}{colspec}{colspec}{thead{row{entry{p}}{entry{p}}{entry{p}}}}{tbody{row{entry{p}}{entry{p{em}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{em}}}{entry{p}}}{row{entry{p}}{entry{p{xref}{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p}}{entry{p}}}{row{entry{p}}{entry{p{em}}}{entry{p}}}{row{entry{p}}{entry{p}}{entry{p}}}{row{entry{p}}{entry{p{em}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}{xref}{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}{xref}{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}{xref}}}{entry{p}}}{row{entry{p}}{entry{p}}{entry{p}}}{row{entry{p}}{entry{p}}{entry{p}}}{row{entry{p}}{entry{p{em}}}{entry{p}}}{row{entry{p}}{entry{p{xref}{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{em}}}{entry{p}}}{row{entry{p}}{entry{p{xref}}}{entry{p}}}{row{entry{p}}{entry{p{em}}}{entry{p}}}}}}{note{p}}}" return ($pattern,$yikes) ! local:emitPattern(.)

3 6

Passing a map to an external variable
by Graydon Saunders 23 Sep '21

23 Sep '21

Hello -- I suspect I am being a cabbage somehow, but I'm not figuring this out. If I have a query in the GUI (9.6.1) which declares an external variable: declare variable $targetMap external; and set the value via the GUI $x button to: map {'structure' : '/some/path/name'} It doesn't work. Typing the variable as map(*) doesn't work. declare variable $targets external; declare variable $targetMap as map(*) := xquery:eval($targets); does work, but makes me think I must be doing something wrong. How does one go about binding a literal map to an external variable? (I am going to want to do this in a script later; the GUI version is strictly for testing.) Thanks! Graydon

3 4

Problems installing EXPath
by Jonathan Robie 03 Sep '21

03 Sep '21

I tried installing EXPath, but without success. > REPO INSTALL http://files.basex.org/modules/expath/functx-1.0.xar Stopped at , 1/66: [repo:parse] functx-1.0.xar: Resource "expath-pkg.xml" not found.. If I download the .xar and unzip it, it looks like this: [image: image.png] Here is the content of expath-pkg.xml: <package xmlns="http://expath.org/ns/pkg" name="http://www.functx.com" abbrev="functx" version="1.0" spec="1.0"> <title>FunctX library</title> <xslt> <import-uri>http://www.functx.com/functx.xsl</import-uri> <file>functx.xsl</file> </xslt> <xquery> <namespace>http://www.functx.com</namespace> <file>functx.xq</file> </xquery> </package> Any thoughts? Jonathan

2 3

Custom map combinator
by Marco Lettere 02 Sep '21

02 Sep '21

Dear all, just thinking out loudly ... Whether it could be interesting to specify a function with proper signature as a custom combinator for map:merge. Currently "duplicates" : "combine" results in the entry value being a sequence of the originating values. This could cause loss of information in the case that one of the merged maps does not contain the key. It could be useful to use defaults or placeholders instead ... Maybe even combine the values as strings or numbers .... Too exotic? M.

1 0

probably a bug
by Rob Stapper 02 Sep '21

02 Sep '21

Hi Cristian, Consider snippets [1] and [2], both result in false(). That can’t be right to me. [1] () = 4 [2] () != 4 Rob. Sent from Mail for Windows -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

3 2

ignore previous mail, please!
by Rob Stapper 02 Sep '21

02 Sep '21

I need a holyday. Sorry about the previous mail. Need to use not()-function offcourse. Rob. Sent from Mail for Windows -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

1 0