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

some stackrelated questions
by Rob Stapper 18 Mar '13

18 Mar '13

Hi, My recursive query gives a stackoverflow: [XQDY0054] Stack Overflow: circular variable declaration? I use the standard, standalone BaseX-software. I'm almost certain it isn't a circular variable declaration because this recursive query can go pretty deep, probably more than a hundred levels and maybe even more. It works on smaller files but it gives this message on the biggest files with the deepest nestinglevel. How deep is the nestinglevel of recursive-queries in BaseX? How can the the max. nestinglevel be increased? Thnx in advance for your reply. Sincerely Rob Stapper

2 1

Re: [basex-talk] seeking for a document in a collection with a million documents is very slow
by Fabrice Etanchaud 18 Mar '13

18 Mar '13

Dear all, >From what I read in the documentation, My problem seems to be related to the update of the resource index. Is this index updated after each add/replace/delete command, Or at the end of the commands' list ? Last, could you please tell me if replace is equivalent to delete+add ? Best, Fabrice De : Fabrice Etanchaud Envoyé : vendredi 15 mars 2013 14:18 À : 'basex-talk(a)mailman.uni-konstanz.de' Objet : seeking for a document in a collection with a million documents is very slow Dear all, Does the document index rely on text or attribute index ? One can experiment very slow response time when looking for a specific document name in an optimized collection of a million documents (in dynamic execution, without optimizations, for example within a loop with a name being the concatenation of string values). Is there a way to speed things up ? Best regards, Fabrice Etanchaud Questel-orbit

2 3

Copy Command
by John Best 18 Mar '13

18 Mar '13

Hi there, I am trying to Copy the "Doc" DB using following piece of code - try{ ....... new Copy("Doc", "Doc1").execute(CONTEXT); ....... ....... } catch(........ .......................... I am expecting another copy of Doc db as Doc1 db... Am I right..? But can't see "Doc1" anywhere... No error mesg... !! -- Have a nice day JBest

2 1

How to update db online without closing application ?
by Pratik Kharwade 18 Mar '13

18 Mar '13

Hi, Our application will be a desktop application with data in XML fomrat. The data is nothing but articles stored as XML and will be displayed in HTML format with the help of XSLT. For this we are using BaseX as desktop DB. Just changed to 7.6. The front-end will have a ListBox displaying the names of the articles, when selected by user, will display the transformed (HTML) document. Along with this functionality, we have given a search tool, which have some common XQuery features like; Exact Phrase, Proximity Search, Word1 OR Word, Word1 NOT Word2... This is what we have done successfully. Now we are stucked at one point. We have to give an online update facility through which the user DB will get updated, if not, as soon as he goes online. This part is also done but... While updating, the our application doesnt response till the updates are done. The user can't interact with the application. What we have planned is updating should be done as a background process and the user can interact with the application while updating. Also after updating the DB should get optimize and the updates should get reflected at the front-end. I hope I have cleared our needs and now waiting for your answer/suggestions. Have a nice day Pratik

3 2

problem with parse-xml function
by Bartosz Marciniak 18 Mar '13

18 Mar '13

Hi, Let me show you a simple example that shows strange behaviour of parse-xml() function: ----------------------------------------------- declare function local:transform($nodes as node()*) as item()* { for $node in $nodes return typeswitch($node) case text() return parse-xml-fragment($node) case element(b) return element b {local:transform($node/node())} default return local:transform($node/node()) }; let $textdoc := <doc><a>content 1</a> <a>content 2</a> </doc> let $doc := <doc>{ for $node in $textdoc/node() return local:transform($node) }</doc> let $doc2 := <doc>{ for $node in $doc/node() return $node }</doc> return $doc ---------------------------------------------------- After running it on baseX 7.6 the result is: $doc = <doc> <a>content 1</a> <a>content 2</a> </doc> but it differs from doc2: $doc2 = <doc> <a>content 2</a> <a>content 1</a> </doc> Why does using parse-xml() function change the order of the elements? I ran this simple code on zorba and eXist (using util:parse() function) and $doc2 was the same as $doc. Regards Bartosz Marciniak

2 1

Home, DBPATH etc. when basexserver is started in service mode
by Subash Kalbarga 18 Mar '13

18 Mar '13

Hi a) I am a new user, so far love basex and I am on Win7. I use the zip file (rather than the setup program) and extract b) I specifically set -Dorg.basex.path=c:\blah" in basexserver.bat and basexclient.bat c) If I now start basexserver.bat from a command prompt and then from another command prompt start basexclient.bat and do an "info" I see DB_PATH, REPO_PATH etc. set correctly to "c:\blah" as it should be. d) However if I run basexserver.bat -S (start as service) and then connect via basexclient.bat ,and do a info, the DB_PATH_REPO_PATH etc. are completely confused and basexclient thinks they are in its current directory. Moreover, if I actually create a database and add a file to it and close and then check where the data is stored, it is stored in the place basexclient thinks the DBPATH is rather than where it should be as per the server e) I am sort of sure that the server is looking at the correct paths even when started in -S mode because I see .basexhistory and .logs being created in C:\blah Thanks in advance

2 1

Wie man gutes Einkommen mit dieser Methode wird
by Emily Parker 16 Mar '13

16 Mar '13

Hello Basex Talk Ich habe 12 Jahre lang in Casinos gearbeitet. Ich habe tausende Menschen gesehen, die versucht haben, an den Roulette-Tischen Geld zu verdienen. Wenn sie nur gewusst hätten, dass der richtige Ort, um beim Roulette Geld zu verdienen, nicht das Casino, sondern das Internet ist! Online Casinos basieren auf Computerprogrammen und wenn Sie die Funktionsweise des Systems verstehen, können Sie diese schlagen. „Ein seltsamer Trick“ machte mich und hunderte andere Menschen reich! Finden Sie heraus, wie SIE GLEICH JETZT dasselbe tun können! Klicken Sie auf den unten stehenden Link, um das Roulette-System kennenzulernen, mit dem ich mein Haus, meine Urlaube und die Ausbildung meiner Kinder finanziert habe! http://awhub.com/b/click/270/47403792/2c1a3.html mit beste Grüße, Emily Parker P.S. Diese Methode ist so einfach, dass sie sogar Kinder verstehen! Ich weiß das, da mein Tochter Julia SELBST Geld damit verdient! Um aus unserer Mailingliste austragen http://awhub.com/b/unsub/189/47403792/2c1a3.html

1 0

seeking for a document in a collection with a million documents is very slow
by Fabrice Etanchaud 15 Mar '13

15 Mar '13

Dear all, Does the document index rely on text or attribute index ? One can experiment very slow response time when looking for a specific document name in an optimized collection of a million documents (in dynamic execution, without optimizations, for example within a loop with a name being the concatenation of string values). Is there a way to speed things up ? Best regards, Fabrice Etanchaud Questel-orbit

1 0

re-sort database
by Cerstin Elisabeth Mahlow 14 Mar '13

14 Mar '13

Hi, after a lot of data has been gathered, I realized that my update-function has a bug. It's not a big deal fixing it, however, I don't know how to resort the existing data. Essentially, I wanted to create this kind of data: <collection> <entry> <node>123</node> <query>xyz</query> <secondquery>abc_1</secondquery> <secondquery>abc_2</secondquery> </entry> <entry> <node>456</node> <query>xyz</query> <secondquery>abc_1</secondquery> <secondquery>abc_3</secondquery> <secondquery>abc_4</secondquery> </entry> </collection> However, the data looks like this: <collection> <entry> <node>123</node> <query>xyz</query> </entry> <secondquery>abc_1</secondquery> <secondquery>abc_2</secondquery> <entry> <node>456</node> <query>xyz</query> </entry> <secondquery>abc_1</secondquery> <secondquery>abc_3</secondquery> <secondquery>abc_4</secondquery> </collection> So, the secondqueries are stored just after the entry they belong to. How would I be able to move these data from "right after a particular node" to "just inside this particular node" using XQuery Update? Thanks in advance and best regards Cerstin -- Dr. phil. Cerstin Mahlow Universität Basel Departement Sprach- und Literaturwissenschaften Fachbereich Deutsche Sprach- und Literaturwissenschaft Nadelberg 4 4051 Basel Schweiz Tel: +41 61 267 07 65 Fax: +41 61 267 34 40 Mail: cerstin.mahlow(a)unibas.ch Web: http://www.oldphras.net

4 8

Error in 7.6 !! but not in 7.5
by John Best 14 Mar '13

14 Mar '13

Hi there, for $x in (db:fulltext('work', 'string theory')/ancestor::*:Doc except db:fulltext('work', 'elastic')/ancestor::*:Doc) return substring(data($x/Publish/PubDate/@d), 7) I am storing Dates in YYYYMMDD Format as <PubDate d="20040608"> tag. The above query will return the Date of the Document published for the searched criteria. Using the BaseX 7.5, I was able to run the query correctly. But with 7.6, I am getting error *"Single item expected, ("20040608", "20040609") found"* -- Have a nice day JBest

2 1

Re: [basex-talk] Bugreport: org.basex.server.ClientQuery.cache(ClientQuery.java:81)
by Bodo Hüsemann 13 Mar '13

13 Mar '13

Hi all, I apologize for the german post on this english mailinglist...So here we go in english: I have recently migrated my BaseX application from version 7.2 to 7.6 (and 7.6.1 Beta). The BaseX lib throws exceptions while running concurrent XQuery queries and updates (based on a threadpool), see the exceptions attached below (the specific numeric error-code changes slightly but the error occurs every time on the same line of code). The error itself seems to happen unter heavy concurrency (sequential queries have no problem) and not every time query executes. The application code is as follows (class de.infabswissarmy.control.XMLDBManagerBaseX.query): public ArrayList<String> query(String inQuery, String[][] inArgs){ ClientSession mySession = null; ClientQuery myQuery = null; ArrayList<String> tmpString = new ArrayList<String>(); try { mySession = getClientSession(); myQuery = mySession.query(inQuery); // bind variable if (inArgs != null){ for (int i=0; i < inArgs.length; i++){ myQuery.bind("$" + inArgs[i][0], inArgs[i][1]); } } while (myQuery.more()){ // **exception is in this line ** tmpString.add(myQuery.next()); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (myQuery != null){ try { myQuery.close(); } catch (BaseXException e) { // ignore } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return tmpString; } To be complete this is the used helper function: private static ClientSession getClientSession() throws IOException { ClientSession mySession = new ClientSession("localhost", 1984, "admin", "admin"); return mySession; } Version 7.2 is running without problems. In version 7.6 I have seen some rare Java heap space errors at the same location, and once I even saw a massive growth of the DB > 1GB (normal size would be 1MB), but this may be another error and I cannot reproduce it. I will try to deliver a selfcontained min-example, but this could be quite an effort to do (it will take some time to produce it). So I hope that you might find the problem with the delivered information. Many thanks once again for this great XML-DB and thanks in advance for your help! Bodo -- attached error stack with version 7.6.1 (in 7.6 the error occurs in row 79 instead of 81) org.basex.core.BaseXException: -146032 at org.basex.server.ClientQuery.cache(ClientQuery.java:81) at org.basex.server.Query.more(Query.java:74) at de.infabswissarmy.control.XMLDBManagerBaseX.query(XMLDBManagerBaseX.java:86) at de.infabswissarmy.control.XMLDBManagerBaseX.queryDoc(XMLDBManagerBaseX.java: 121) at de.infabswissarmy.control.QueryTask.httpQuery(QueryTask.java:180) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:271) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) org.basex.core.BaseXException: 0 at org.basex.server.ClientQuery.cache(ClientQuery.java:81) at org.basex.server.Query.more(Query.java:74) at de.infabswissarmy.control.XMLDBManagerBaseX.query(XMLDBManagerBaseX.java:86) at de.infabswissarmy.control.XMLDBManagerBaseX.queryDoc(XMLDBManagerBaseX.java: 121) at de.infabswissarmy.control.QueryTask.httpQuery(QueryTask.java:180) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:271) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) org.basex.core.BaseXException: java.lang.ArrayIndexOutOfBoundsException at org.basex.server.ClientQuery.cache(ClientQuery.java:81) at org.basex.server.Query.more(Query.java:74) at de.infabswissarmy.control.XMLDBManagerBaseX.query(XMLDBManagerBaseX.java:86) at de.infabswissarmy.control.XMLDBManagerBaseX.queryDoc(XMLDBManagerBaseX.java: 121) at de.infabswissarmy.control.QueryTask.httpQuery(QueryTask.java:180) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:271) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

2 4

index usage while processing large xml file(s)
by EV Narasimham 13 Mar '13

13 Mar '13

Hi, I'm currently processing a 3GB xml file. Below is the Query that is being executed and the corresponding output count(db:open("ASEPXML", "A_SEPXML")/descendant::*:PmtInf[15]/*:CdtTrfTxInf/*:CdtrAgt/*:FinInstnId/*:BIC/text()) Output: 100000 The total time taken to evaluate the query is 210 secs. Below is the query plan. Compiling: - pre-evaluating db:open("ASEPXML", "A_SEPXML") Optimized Query: fn:count(document-node { "A_SEPXML" }/descendant::*:PmtInf[15]/*:CdtTrfTxInf/*:CdtrAgt/*:FinInstnId/*:BIC/text()) Result: - Hit(s): 1 Item - Updated: 0 Items - Printed: 6 Bytes - Locking: local [ASEPXML] Timing: - Parsing: 0.0 ms - Compiling: 0.28 ms - Evaluating: 210818.96 ms - Printing: 0.08 ms - Total Time: 210819.34 ms Query plan: <QueryPlan> <FNAggr name="count(item)"> <CachedPath> <DBNode name="ASEPXML" pre="0"/> <IterPosStep axis="descendant" test="*:PmtInf"> <Pos min="15" max="15"/> </IterPosStep> <IterStep axis="child" test="*:CdtTrfTxInf"/> <IterStep axis="child" test="*:CdtrAgt"/> <IterStep axis="child" test="*:FinInstnId"/> <IterStep axis="child" test="*:BIC"/> <IterStep axis="child" test="text()"/> </CachedPath> </FNAggr> </QueryPlan> The database ASEPXML has text index created. The structure of the xml is as follows: <root> <PmtInf> <CdtTrfTxInf> <CdtrAgt> <FinInstnId> <BIC>XXXXXX1A</BIC> </FinInstnId> </CdtrAgt> </CdtTrfTxInf> <CdtTrfTxInf> <CdtrAgt> <FinInstnId> <BIC>XXXXXX2A</BIC> </FinInstnId> </CdtrAgt> </CdtTrfTxInf> <CdtTrfTxInf> <CdtrAgt> <FinInstnId> <BIC>XXXXXX3A</BIC> </FinInstnId> </CdtrAgt> </CdtTrfTxInf> <CdtTrfTxInf> ... repeating node (100000) </PmtInf> <PmtInf> </PmtInf> ... repeating node (40) </root> Are there possibilities of reducing the response times and how do I detect if an index is being used or not ? Regards Nesh

3 2

Make-Up Brushes
by sales32＠injoybeauty.NET 12 Mar '13

12 Mar '13

Dear Madam/Sir, My company MANUFACTURE different kinds of MAKEUP BRUSHES. Please see the products in the attached IMAGE. Simply REPLY if any questions or requests. B.R Mr. Woo

1 0

Java Client - Error BXDB0006 while accessing a single document
by Carlos MARCOS LAGUNAR 11 Mar '13

11 Mar '13

Hello. I've just installed last version of BaseX and have built a Java Client to access it. This is my code: String query = "insert node <patient>EOEO</patient> into fn:doc(\"MG_USERS/58745896522DFEF.xml\")/vmr" ClientSession cSes = new ClientSession(URL, PORT, USER, PASS); ClientQuery cQuery = cSes.query(query); String res = cQuery.execute(); cQuery.close(); And I'm getting this error: [BXDB0006] Database path 'MG_USERS/58745896522DFEF.xml' must point to a single document. I'm pretty sure that there is only ONE document there, since I always execute a DELETE MG_USERS/58745896522DFEF.xml prior of that code you see above. Furthermore, just before executing that code, I check it with a REST call via Internet Explorer and I get just one doc. So I don't really understand why I get the BXDB0006 error. If I try the same but with the REST interface instead of Java Client, by using: <rest:query xmlns:rest=\"http://basex.org/rest\"> <rest:text> insert node <patient>EOEO</patient> into fn:doc(\"MG_USERS/58745896522DFEF.xml\")/vmr </rest:text> I get the same error. Could anybody help me with this, please?. Thank you and best regards, C. Carlos Marcos Lagunar Health Technical Consultant Research & Innovation carlos.marcos(a)atosresearch.eu <mailto:carlos.marcos@atosresearch.eu> Valladolid - Spain www.atosresearch.eu <http://www.atosresearch.eu/> es.atos.net ------------------------------------------------------------------ This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Atos group liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted. Este mensaje y los ficheros adjuntos pueden contener informacion confidencial destinada solamente a la(s) persona(s) mencionadas anteriormente pueden estar protegidos por secreto profesional. Si usted recibe este correo electronico por error, gracias por informar inmediatamente al remitente y destruir el mensaje. Al no estar asegurada la integridad de este mensaje sobre la red, Atos no se hace responsable por su contenido. Su contenido no constituye ningun compromiso para el grupo Atos, salvo ratificacion escrita por ambas partes. Aunque se esfuerza al maximo por mantener su red libre de virus, el emisor no puede garantizar nada al respecto y no sera responsable de cualesquiera danos que puedan resultar de una transmision de virus. ------------------------------------------------------------------

2 9

BaseX Server
by zanzinger＠alice-dsl.de 11 Mar '13

11 Mar '13

Dear Sirs, I am coming from the "content-side" of xml, therefore please excuse the maybe simple questions. (I did a lot xml, xslt, now xquery; a lot vba; a little objective C and C - but not much client-cerver-things). I am trying out BaseX-features. This is, what I´ve done so far: - Installation (Mac-Version) was easy. - Creating a Database via the GUI was easy. - Testing XQuery in the GUI was easy as well. - Now I tried the server: First I started the server with the Gui-Menu-Commands: it works. Fine: I can access the Server by the Command-Line of the Gui, e.g. get an answer to the command "list" or get the answer on a "xQuery …" . The Problem is now: I am searching an easy tutorial or explanation, how I can access the Server from a Browser (e.g. Safari), or for example from a loaded webpage in the browser, which has appropriate xml-/xquery/javascript-code to access the database (how do I write that cods?). I already tried to connect to the server via Mac-webDAV: does not work, whereas from the Gui, I can connect to the server. In the Browser, I tried "http://localhost:1984/rest" :no response. Is there any easy tutorial, how jetty interacts with baseX-server? Are there books on how to set up the client-server architecture of baseX? Where (which directory) has a static html-page to be placed, which I can call via localhost? (That seemed to me the first simple step to access the server.) The next logical step would be to route the http:// - request to the database-server?! As far as I understand, this is done by the various APIs, e.g. php or node.js? Hope, you understand my needs... I am very interested in baseX as the results so far seem very promising to me. Thanks in advance for an answer (English or German). Dieter Zanzinger München zanzinger(a)alice-dsl.de

2 1

Re: [basex-talk] Debugger for Xuery
by John Best 10 Mar '13

10 Mar '13

Hi, These link might help you - http://www.oxygenxml.com/xml_editor/xquery_debugger.html http://www.w3.org/TR/xpath-functions/#func-trace -- Have a nice day JBest

1 0

Debugger for Xuery
by bhupesh patel 10 Mar '13

10 Mar '13

Hello All, I am looking for any free/paid version of debugger for XQuery while using BaseX server. Can anyone point me to any resources you guys know of? Thanks, Bhupesh

4 5

BaseX 7.7 Beta
by Christian Grün 08 Mar '13

08 Mar '13

Dear all, we are very busy right now, finalizing Version 7.7 of BaseX. This is what you can expect from the upcoming release: – full XQuery 3.0 support, including enhanced (generalized) FLWOR expressions... http://docs.basex.org/wiki/XQuery_3.0 – a new XQUnit Module, which facilitates testing of complex XQuery applications: http://docs.basex.org/wiki/XQUnit_Module – improved concurrency control on database level: http://docs.basex.org/wiki/Transaction_Management You are invited to download the latest stable snapshot: http://files.basex.org/releases/latest/ Big thanks to our team member Leo for internalizing all the intricacies of XQuery 3.0, and providing a great implementation! And thank you all for letting BaseX grow and flourish, both as contributors, developers and users. Your feedback is welcome, Christian BaseX Team, 2013

1 0

Bugreport: org.basex.server.ClientQuery.cache(ClientQuery.java:81)
by Bodo Hüsemann 08 Mar '13

08 Mar '13

Moin zusammen, ich habe meine Base-X Applikation von Version 7.2 auf 7.6 und versuchsweise auf 7.6.1 (Beta) umgestellt (embedded Base-X Server). Hierbei wirft die BaseX Lib bei parallelen XQuery Anfragen bei gleichzeitigen Inserts (ich verwende einen Threadpool) reproduzierbar die unten angehängte Fehlermeldung (in Variationen auch mit anderen Fehlercodes, aber immer an der gleichen Stelle/Zeile und beim gleichen Aufruf). Der Fehler tritt nicht bei jeder Anfrage auf (es scheint also eine bestimmte Concurrency Situation vorzuliegen). Die betreffende Funktion im Applikationscode ist wie folgt: public ArrayList<String> query(String inQuery, String[][] inArgs){ ClientSession mySession = null; ClientQuery myQuery = null; ArrayList<String> tmpString = new ArrayList<String>(); try { mySession = getClientSession(); myQuery = mySession.query(inQuery); // bind variable if (inArgs != null){ for (int i=0; i < inArgs.length; i++){ myQuery.bind("$" + inArgs[i][0], inArgs[i][1]); } } while (myQuery.more()){ // ** hier wird die Exception geworfen ** tmpString.add(myQuery.next()); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (myQuery != null){ try { myQuery.close(); } catch (BaseXException e) { // ignore } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return tmpString; } Hier noch getClientSession: private static ClientSession getClientSession() throws IOException { ClientSession mySession = new ClientSession("localhost", 1984, "admin", "admin"); return mySession; } In der Version 7.2 war noch alles ok. Wahlweise habe ich auch schon Java-Heap Space Fehler an gleicher Stelle bekommen. Und in einem Fall ist die Datenbank plötzlich auf über 1GB angewachsen (vielleicht ein anderes Problem). Bevor ich anfange hierzu einen Minimalcase zu produzieren (was vermutlich recht aufwändig werden wird, da der Fehler nur unter Lastbedingungen auftritt) liefere ich vorab schon mal diesen Fehlerbericht. Vielleicht fällt ja direkt ein Problem ins Auge.... Wie immer vielen Dank für diese Klasse XML-DB und viele Grüße, Bodo -- Anhang Fehlermeldungen mit Version 7.6.1 (in 7.6 war die Zeilennr: 79) org.basex.core.BaseXException: -146032 at org.basex.server.ClientQuery.cache(ClientQuery.java:81) at org.basex.server.Query.more(Query.java:74) at de.infabswissarmy.control.XMLDBManagerBaseX.query(XMLDBManagerBaseX.java:86) at de.infabswissarmy.control.XMLDBManagerBaseX.queryDoc(XMLDBManagerBaseX.java: 121) at de.infabswissarmy.control.QueryTask.httpQuery(QueryTask.java:180) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:271) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) org.basex.core.BaseXException: 0 at org.basex.server.ClientQuery.cache(ClientQuery.java:81) at org.basex.server.Query.more(Query.java:74) at de.infabswissarmy.control.XMLDBManagerBaseX.query(XMLDBManagerBaseX.java:86) at de.infabswissarmy.control.XMLDBManagerBaseX.queryDoc(XMLDBManagerBaseX.java: 121) at de.infabswissarmy.control.QueryTask.httpQuery(QueryTask.java:180) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:271) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) org.basex.core.BaseXException: java.lang.ArrayIndexOutOfBoundsException at org.basex.server.ClientQuery.cache(ClientQuery.java:81) at org.basex.server.Query.more(Query.java:74) at de.infabswissarmy.control.XMLDBManagerBaseX.query(XMLDBManagerBaseX.java:86) at de.infabswissarmy.control.XMLDBManagerBaseX.queryDoc(XMLDBManagerBaseX.java: 121) at de.infabswissarmy.control.QueryTask.httpQuery(QueryTask.java:180) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:271) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

1 0

Re: [basex-talk] Beginner Qs concerning scope and focus of BaseX
by Johannes.Lichtenberger 07 Mar '13

07 Mar '13

On 03/07/2013 11:04 PM, Silver, Jonathan wrote: > Thanks for the [long] reply. I really do appreciate the extra information. > It seems to me that what I am asking would be a common kind of thing. > > I think that you indicated that I could add a datetimestamp to a node and then have multiple copies. > At least that would get me to have multiple versions. Yes, for instance, but it adds extra information to each changed node and the identity is getting lost (for instance that's great and almost necessary to determine the differences between versions efficiently). It would be best if the storage system itself is capable of this for instance through extending the XDM and identifying a node through a simple tuple: unique ID (and never reuse IDs of deleted nodes) + version or an equivalent. But I suppose it's a great way to do versioning with BaseX. However, determining differences might become cumbersome. A versioning system usually adds references to new versions (as in persistent datastructures[1]). However that always implies some additional overhead through copying of leaf to root paths in tree-based index-structures (for instance the B+-tree shadowing) or at least some kind of overhead in a dictionary to reference the data-pages. I think BaseX is designed to provide the best possible query performance, such that providing snapshots of documents in a collection does not make much sense, but Christian might have additional information (also regarding your second paragraph which I didn't address as I don't know how documents are referenced). kind regards Johannes [1] http://en.wikipedia.org/wiki/Persistent_data_structure

1 0

Beginner Qs concerning scope and focus of BaseX
by Silver, Jonathan 07 Mar '13

07 Mar '13

1. The YouTube intro video has no sound. [2] http:/ / www. youtube. com/ watch?v=xILHKGPGaJ4& hd=1 I've tried it with different browsers and different players. 2. Documents are added to a database using add, with a file pathname (or url..) is it the same pathname that is always Used to refer to that document? Or can I reference it another way? I created a database, added 3 documents using the Add command. In list, no input path is displayed, how would I request the second document? 3. If I had a different versions of the factbook xml file (maybe one each year) and so the contents like populations or even languages Change each year, can I and how would I use baseX to manage these? I'd want to do normal queries but I'd also want to do queries for specific years And do queries for what has changed - or changed the most? I'm reading up on XQuery, but some of this looks beond XQuery and required DB support. Thanks, jonathan

2 1

Re: [basex-talk] Linking BaseX to Fuseki RDF triplestore over http
by pw＠themail.co.uk 07 Mar '13

07 Mar '13

Hi Pascal I have not exceeded the limit, but then I'm not working in the DDI arena or something similar where this is a certainty. I think that the database needs to move to a 64bit architecture to handle the large node numbers that are seen in data-centric (rather than document-centric) XML and clearly there is a similar need for those running data archives to have pratically limitless scope for namespaces Peter > > > >---- Original Message ---- >From: pascal.heus(a)gmail.com >To: basex-talk(a)mailman.uni-konstanz.de >Subject: Re: [basex-talk] Linking BaseX to Fuseki RDF triplestore >over http >Date: Thu, 07 Mar 2013 16:34:11 +0100 > >>Peter: >>Thanks for sharing this. One of the concern I have with using >RDF-XML >>and BaseX is the limit of 256 namespaces per database. >>Any thoughts of that topic? >>best >>*P >> >>On 3/7/13 10:43 AM, pw(a)themail.co.uk wrote: >>> Hi List >>> You might be interested in >>> >http://www.slideshare.net/PeterWinstanley1/open-data-edinburghnapier2 >0130305 >>> Peter >>> >>> _______________________________________________ >>> BaseX-Talk mailing list >>> BaseX-Talk(a)mailman.uni-konstanz.de >>> https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >>> >> >>_______________________________________________ >>BaseX-Talk mailing list >>BaseX-Talk(a)mailman.uni-konstanz.de >>https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >>

1 0

Linking BaseX to Fuseki RDF triplestore over http
by pw＠themail.co.uk 07 Mar '13

07 Mar '13

Hi List You might be interested in http://www.slideshare.net/PeterWinstanley1/open-data-edinburghnapier20 130305 Peter

2 1

Using xquery in a xslt stylesheet
by Raymond Meester 07 Mar '13

07 Mar '13

I thought I share this one, just in case someone needs to call BaseX (xquery the database in this example) from xslt: Greets, Raymond Example: <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="2.0" exclude-result-prefixes="xsl basex" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:basex="java:org.basex.server.ClientSession">  <xsl:variable name="session" select="basex:new('localhost', 1984, 'admin','admin')"/> <xsl:template match="/">  <xsl:variable name="query"><xsl:text>XQUERY for $doc in db:open("SampleDB") return $doc</xsl:text></xsl:variable> <example>  <xsl:value-of select="basex:execute($session,string($query))"/> </example> </xsl:template> </xsl:stylesheet>

1 0

Some general questions
by Kuranov, Anton 05 Mar '13

05 Mar '13

Hello, We are looking for fast and simple Java XML database engine for our integration solution. I've found BaseX that seems to be a good option but I have some questions about it: - Performance. How it feels on large databases, about 50-100 millions of nodes? Does performance degrades significally? What is the maximum number of nodes that BaseX have been tested with? - Streamable queries. We will need to send large datasets to client including the whole database. Does BaseX provides a streamable queries without caching whole resultset nowhere in memory (something like server cursors in RDBMS)? If we will use XQJ API and Java as middleware, is it will possible to create a fully streamable service to retrieve large amounts of data directly from database? - Failover. Our clients strongly require failover mode. I saw that at the moment BaseX does not support clustering and replication but it can be done at OS level using distributed file systems like Ceph or ClusterFS. Can we have two o more BaseX instances connected to the same shared storage? - What transaction isolation levels BaseX supports? Do BaseX transactions support JTA architecture? Regards, Antón ________________________________ Este correo electrónico y, en su caso, cualquier fichero anexo al mismo, contiene información de carácter confidencial exclusivamente dirigida a su destinatario o destinatarios. Si no es vd. el destinatario indicado, queda notificado que la lectura, utilización, divulgación y/o copia sin autorización está prohibida en virtud de la legislación vigente. En el caso de haber recibido este correo electrónico por error, se ruega notificar inmediatamente esta circunstancia mediante reenvío a la dirección electrónica del remitente. Evite imprimir este mensaje si no es estrictamente necesario. This email and any file attached to it (when applicable) contain(s) confidential information that is exclusively addressed to its recipient(s). If you are not the indicated recipient, you are informed that reading, using, disseminating and/or copying it without authorisation is forbidden in accordance with the legislation in effect. If you have received this email by mistake, please immediately notify the sender of the situation by resending it to their email address. Avoid printing this message if it is not absolutely necessary.

2 1

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

BaseX-Talk