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

preserve auth behavior like older basex versions
by Erik Peterson 05 Mar '17

05 Mar '17

For RESTXQ auth its unclear to me what the entry is to preserve older versions of basex auth. Thank! see... http://docs.basex.org/wiki/Web_Application - Authentication was readded to RESTXQ. As a consequence, you need to specify the admin user in your web.xml file if you want to preserve the behavior of older versions of BaseX. - In turn, if users are defined in the web.xml file, no passwords must be specified anymore. - The server-side authentication method, and default users, are now enforced and cannot be overwritten by client.

2 1

HTTP status codes
by Christoph Gaukel 05 Mar '17

05 Mar '17

Hi, i tried to return http-status 404, but my service returns status 400: This is the code in my XQuery: fn:error(xs:QName('error'), 'Invoice ' || $id || ' does not exist', 404) This is what curl prints: * Trying 127.0.0.1... * Connected to localhost (127.0.0.1) port 8984 (#0) > GET /softwareberatung/revenues/2015/15-123 HTTP/1.1 > Host: localhost:8984 > User-Agent: curl/7.47.0 > Accept: */* > < HTTP/1.1 400 Bad Request < Set-Cookie: JSESSIONID=cfedc7x61od51p8o40uxm8dfe;Path=/ < Expires: Thu, 01 Jan 1970 00:00:00 GMT < Content-Type: text/plain;charset=UTF-8 < Content-Length: 97 < Server: Jetty(8.1.18.v20150929) < Stopped at /home/christoph/basex/restxq/Revenue.xqm, 64/19: * Connection #0 to host localhost left intact [error] Invoice 15-123 does not exist Regards Christoph Gaukel

1 0

following:: axis
by meumapple 03 Mar '17

03 Mar '17

Hi, In a file with a structure like <l> <d> <f>a</f> <f>b</f> <f>c</f> </d> <d> <f>a</f> <f>b</f> <f>c</f> </d> </l> If I type doc($b)//f[1]/following::f the processor gets out of main memory, even though the file is about 2.2MB and the structure is simply the one showed above (many sibling d elements) Any idea why? Thanks Joseph

2 4

[DBA] jobs-users/server-sessions
by Fabrice ETANCHAUD 03 Mar '17

03 Mar '17

Dear all @BaseX, Could you please explain the exact meaning of the server sessions table in the dba jobs-users window ? I expected to find a list of (servlet) sessions, but instead one can see all the session variables (and among them the session ids). Is it expected behavior ? In that case what does it mean to 'kill' a session variable ? Thank you for showing session ids in the log ! Best regards, Fabrice Etanchaud Groupe FBO

2 1

Re: [basex-talk] basexhttpstop hangs in 8.6.1
by Christian Grün 02 Mar '17

02 Mar '17

Hi Tim, The problem has been fixed with the latest snapshot (thanks to Marco for providing me with more details). Have fun everyone, Christian Am 28.02.2017 1:04 nachm. schrieb "Tim Thompson" <timathom(a)gmail.com>: I've also noticed similar behavior in version 8.6 on Ubuntu 14.04. If I start the server in one terminal window and then run the stop script in a separate window, the server does stop, but the basexhttpstop script keeps hanging. -- Tim A. Thompson Metadata Librarian (Spanish/Portuguese Specialty) Princeton University Library www.linkedin.com/in/timathompson tat2(a)princeton.edu On Tue, Feb 28, 2017 at 6:22 AM, Marco Lettere <m.lettere(a)gmail.com> wrote: > No Christian, really nothing special. Everything used to work neatly until > Saturday when we tried 8.6.1 by just unzipping and launching. Btw we use > Java 1.8.0_121 on both win7 and Ubuntu 16.04. > Latest news same happens on Mac Sierra with Java 1.8.0_121. > We've seen that there have been some commits recently on that parte of the > code but I don't have a connection in my PC now ti check it in depth. Sorry. > Ciao, > Marco. > > Il 28 feb 2017 10:49 AM, "Christian Grün" <christian.gruen(a)gmail.com> ha > scritto: > >> Hi Marco, >> >> Hm, so it seems that the file is not deleted by the shutdown process. >> I cannot reproduce this with the zip distribution on both Window 10 >> and Ubuntu; have you changed anything in the configuration files? >> >> Christian >> >> >> >> On Tue, Feb 28, 2017 at 9:38 AM, Marco Lettere <m.lettere(a)gmail.com> >> wrote: >> > Hi Christian, >> > -d doesn't add much info. >> > But we've found out that the shutdown script hangs on a file >> BasexHTTP8985 >> > in the tmp directory. This happens btw on Windows 7 too. >> > If we delete the file, while basexhttpstop is blocked, then >> basexhttpstop >> > ends immediately and correctly. If we ctrl-c basexhttpstop then at the >> next >> > shutdown we get a FileAlreadyExists exception. >> > >> > Thanks for tour support. >> > Marco. >> > >> > Il 28 feb 2017 12:05 AM, "Christian Grün" <christian.gruen(a)gmail.com> >> ha >> > scritto: >> >> >> >> Hi Marco, >> >> >> >> Could you please report back to us what exactly is output on the two >> >> shells? Ideally, please run both commands with the -d flag. >> >> >> >> Thanks in advance, >> >> Christian >> >> >> >> PS: Does it work with 8.6, 8.5.3 or older versions? >> >> >> >> >> >> >> >> > I just downloaded Basex861.zip for Linux (Ubuntu 16.04 the host). >> >> > >> >> > Unizipped and started basexhttp. Everything ok. >> >> > >> >> > In another shell I launch basexhttpstop which correctly shuts down >> the >> >> > server started before. But basexhttpstop itself does not terminate. >> >> > >> >> > This is causing some headache in our scripts that launch and stop >> >> > several >> >> > instances. >> >> > >> >> > Any clue? >> >> > >> >> > Thanks a lot, >> >> > >> >> > Marco. >> >> > >> >

1 0

[REST-XQ] cookies and path cookie
by Fabrice ETANCHAUD 02 Mar '17

02 Mar '17

Dear all (again ;)) As BaseX as a Web Application can serve several 'sub' applications, I ran into the following issue : 1- Logged in into the DBA interface 2- Session:close() in another rest-xq end point (in the same browser) 3- I got disconnected from the DBA interface It seems normal behavior because cookie is shared among all basex applications in the same Web Application (path cookie is the same for all sub applications). I cannot figure out how we could easily have private cookies for each 'sub-application' ? Best regards, Fabrice Etanchaud

2 1

basexhttpstop hangs in 8.6.1
by Marco Lettere 02 Mar '17

02 Mar '17

Hello all, I just downloaded Basex861.zip for Linux (Ubuntu 16.04 the host). Unizipped and started basexhttp. Everything ok. In another shell I launch basexhttpstop which correctly shuts down the server started before. But basexhttpstop itself does not terminate. This is causing some headache in our scripts that launch and stop several instances. Any clue? Thanks a lot, Marco.

3 7

Connection reset by peer: socket write error
by France Baril 01 Mar '17

01 Mar '17

We have about 40 databases in out project, but when trying to save files to one of them, users sometimes get this error. We're saving through webdav, on a network connection. We're on version 8.2.3 and cannot upgrade right now. Any clue would be useful. -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com

2 2

Integrating IntelliJ IDEA and BaseX
by Bridger Dyson-Smith 01 Mar '17

01 Mar '17

Hi all, I'm hoping to get some feedback (and potential collaborators) on a wiki page I created[1] that attempts to help a user get started with IDEA, XQuery, and BaseX. However!, I'm feeling a bit uncertain about my limited experience with workflows, tooling, and IDEA set up, and so I'm hoping that those of you on this list who use BaseX and IDEA might be willing to pass along feedback about the linked documentation. Particularly, how are you interacting with BaseX both as a processor and as client/server? How are you starting and stopping your server? What pieces of IDEA are you leveraging to make working with XQuery and BaseX a(n even) better experience? Thank you in advance for your time and trouble. Best, Bridger [1] http://docs.basex.org/wiki/Integrating_IntelliJ_IDEA

3 3

querying xml with namespaces.
by Witold E Wolski 01 Mar '17

01 Mar '17

Apologies if I am hard to understand but I am new to the XML querying. I would like to query an XML with namespaces. As I did learn, you can do it in BaseX by including an *: in your path, e.g., db:open("myrimatchSubset","20160312_17_B3_myrimatch_2_2_140.xml")/*:MzIdentML/*:SequenceCollection/*:Peptide But I would like to be more specific than *. I did search the schema for the XML and all I found related to the search term namespace is not brief name, but: targetNamespace="http://psidev.info/psi/pi/mzIdentML/1.1" I did also found the following entry on stack overflow: http://stackoverflow.com/questions/5239685/xml-namespace-breaking-my-xpath And If I interpret the answer there correctly somehow one can register his own acronym for a namespace? Is this correct? So I am wondering if I could do the same somehow in BaseX? Alternatively, I am wondering if I could tell BaseX to disable namespace checking? Thank you a lot -- Witold Eryk Wolski

2 3

A suggestion (csv:doc, ...)
by Hans-Juergen Rennau 28 Feb '17

28 Feb '17

Dear BaseX team, if you are interested in further boosting the power of BaseX as a resource monitoring tool, you might consider the tiny, yet useful extension described below. Currently we have various functions for parsing non-XML formats into node trees: json:parse($text ...) csv:parse($text ...) html:parse($text ,,, These functions expect as input the text to be parsed, not the URI from which to retrieve the text. Of course, it is trivial to combine retrieval and parsing, using fn:unparsed-text(), like so: unparsed-text('foo.json') ! json:parse(.) However, the resulting document does not have a document URI, and it would be cumbersome to associate it with one. So how about adding three functions json:doc($uri ...) csv:doc($uri ...) html:doc($uri ...) Two advantages: first the document URI is available, second - sheer elegance. As an example of this elegance, consider the task to create a list of all .csv files found in a directory tree which have inconsistent record lengths. Using csv:doc, the solution is a simple expression, rather than a program: file:list($dir, true(), "*.csv") ! concat($dir, '/', .) ! csv:doc(.) [1 eq count(//record/count(*) => distinct-values())] / document-uri(.) Cheers,Hans-Jürgen

1 0

Help with understanding collections and user management
by kalibuk＠centrum.cz 28 Feb '17

28 Feb '17

Hallo, I have few questions while trying to get used to and use BaseX database in our solution. A) Could be empty collection in a database created? This query db:add("MyDBName","","/NewCollectionName") perforemed in GUI creates collection NewCollectionName but copies there also bunch of other things used as example… I tried also to ADD a xml file to NewCollection which works , new collection was created, but when I deleted that file, collection disappered also ! B) Is it possible to grant various users different access rights to different collections under one database ? Eg. granting access rights to groups of users and/or creating roles ? Regards and thanks for your good job, Jan Matuszek

2 1

Exit a for-loop?
by Joseph 27 Feb '17

27 Feb '17

Hi, I have two sets of numbers, and I would like to write a for-loop for comparison, so that I get only the first match between the numbers. I was thinking of a double for-loop, but I do not know how to exit the comparison as soon as I get the first match. Any idea? Thanks. Joseph

3 2

A suggestion (json:doc, etc.)
by Hans-Juergen Rennau 26 Feb '17

26 Feb '17

Dear BaseX team, if you are interested in further boosting the power of BaseX as a resource monitoring tool, you might consider the tiny, yet useful extension described below. Currently we have various functions for parsing non-XML formats into node trees: json:parse($text ...) csv:parse($text ...) html:parse($text ,,, These functions expect as input the text to be parsed, not the URI from which to retrieve the text. Of course, it is trivial to combine retrieval and parsing, using fn:unparsed-text(), like so: unparsed-text('foo.json') ! json:parse(.) However, the resulting document does not have a document URI, and it would be cumbersome to associate it with one. So how about adding three functions json:doc($uri ...) csv:doc($uri ...) html:doc($uri ...) Two advantages: first the document URI is available, second - sheer elegance. As an example of this elegance, consider the task to create a list of all .csv files found in a directory tree which have inconsistent record lengths. Using csv:doc, the solution is a simple expression, rather than a program: file:list($dir, true(), "*.csv") ! concat($dir, '/', .) ! csv:doc(.) [1 eq count(//record/count(*) => distinct-values())] /document-uri(.) Alaaf!Hans-Jürgen

1 0

Somewhat unusual question
by Marco Lettere 25 Feb '17

25 Feb '17

Hi to everyone, probably this is not the right place for such a discussion but the BaseX communitiy is the one I'm better introduced to and the one I trust the most. So I hope that this somewhat unusual excursus will anyway be of interest to some of you. As for myself I fell in love with XQuery and its power in terms of data manipulation many years ago. I wouldn't change it with anything else and BTW we're using it (thanks to the incredible BaseX runtime) much beyond data-processing being it the backbone of all our micro-service oriented architectures. Now, to the point, in the near future I probably will be called to face a somewhat skeptical customer who will argue about the technological choice of XQuery. My point will be to make a comparison with the technologies they're currently using and I would like to demonstrate that for a rather XML- (and in general data-) intensive workflow XQuery is perfectly suitable and probably better than many other alternatives. I would tend to exclude XSLT because it would face similar opposition. I would also exclude languages at a lower level of abstraction like Java, Python, Javascript, C/C++ and so on for obvious architectural reasons. But then only templating languages/engines come to my mind. Those would still be probably novel technologies to learn and wouldn't offer the structural, syntactic and semantic power of XQuery anyway. So I ask you kindly, in order to complete my preparation on these matters, is there anyone that has experience with other tools or languages that can be compared with XQuery when used for XML querying, generation, transformation, templating, composition and so on? Thanks a lot! Marco.

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Improper use? Potential bug?
by Rob Stapper 25 Feb '17

25 Feb '17

Hi Christian, I encountered this error-message. I have a strong feeling that this error is related to previous reports, see . my email dd 13-05-2013 and 03-12-2014 My program is heavily recursive so it is hard to create a running snippet but I will try. Hopefully in the mean time you can have a look at the error. TIA, Rob Stapper ===================================== Error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 8.6.1 beta 855f949 Java: Oracle Corporation, 1.8.0_31 OS: Windows Vista, x86 Stack Trace: java.lang.RuntimeException: $seq_1644 as (function(*))? index: 87, slot: 9 at org.basex.util.Util.notExpected(Util.java:62) at org.basex.query.var.QueryStack.pos(QueryStack.java:101) at org.basex.query.var.QueryStack.set(QueryStack.java:123) at org.basex.query.QueryContext.set(QueryContext.java:756) at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:184) at org.basex.query.expr.gflwor.GFLWOR.item(GFLWOR.java:58) at org.basex.query.expr.ParseExpr.toItem(ParseExpr.java:488) at org.basex.query.expr.ParseExpr.toArray(ParseExpr.java:663) at org.basex.query.func.fn.FnApply.value(FnApply.java:32) at org.basex.query.func.Closure.item(Closure.java:288) at org.basex.query.func.Closure.value(Closure.java:321) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invoke(FuncCall.java:87) at org.basex.query.func.FuncCall.value(FuncCall.java:159) at org.basex.query.value.item.FItem.invokeValue(FItem.java:44) at org.basex.query.func.fn.FnApply.value(FnApply.java:38) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invoke(FuncCall.java:87) at org.basex.query.func.FuncCall.value(FuncCall.java:159) at org.basex.query.value.item.FItem.invokeValue(FItem.java:44) at org.basex.query.func.fn.FnApply.value(FnApply.java:38) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.expr.If.value(If.java:128) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invokeTail(FuncCall.java:123) at org.basex.query.func.FuncCall.value(FuncCall.java:60) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invokeTail(FuncCall.java:123) at org.basex.query.func.FuncCall.value(FuncCall.java:60) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.expr.If.value(If.java:128) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invokeTail(FuncCall.java:123) at org.basex.query.func.FuncCall.value(FuncCall.java:60) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.expr.If.value(If.java:128) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invokeTail(FuncCall.java:123) at org.basex.query.func.FuncCall.value(FuncCall.java:60) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invokeTail(FuncCall.java:123) at org.basex.query.func.FuncCall.value(FuncCall.java:60) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.expr.If.value(If.java:128) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invokeTail(FuncCall.java:123) at org.basex.query.func.FuncCall.value(FuncCall.java:60) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:182) at org.basex.query.func.FuncCall.invoke(FuncCall.java:87) at org.basex.query.func.FuncCall.value(FuncCall.java:61) at org.basex.query.expr.TypeCheck.value(TypeCheck.java:131) at org.basex.query.func.Closure.item(Closure.java:288) at org.basex.query.func.Closure.value(Closure.java:321) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invoke(FuncCall.java:87) at org.basex.query.func.FuncCall.value(FuncCall.java:159) at org.basex.query.value.item.FItem.invokeValue(FItem.java:44) at org.basex.query.func.fn.FnApply.value(FnApply.java:38) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invoke(FuncCall.java:87) at org.basex.query.func.FuncCall.value(FuncCall.java:159) at org.basex.query.value.item.FItem.invokeValue(FItem.java:44) at org.basex.query.func.fn.FnApply.value(FnApply.java:38) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:182) at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:95) at org.basex.query.expr.ParseExpr.item(ParseExpr.java:51) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:65) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:117) at org.basex.query.func.FuncCall.invoke(FuncCall.java:87) at org.basex.query.func.FuncCall.value(FuncCall.java:159) at org.basex.query.value.item.FItem.invokeValue(FItem.java:44) at org.basex.query.func.fn.FnFoldLeft.value(FnFoldLeft.java:22) at org.basex.query.QueryContext.value(QueryContext.java:405) at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:182) at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:95) at org.basex.query.scope.MainModule$1.next(MainModule.java:121) at org.basex.query.QueryContext.cache(QueryContext.java:635) at org.basex.query.QueryProcessor.cache(QueryProcessor.java:113) at org.basex.core.cmd.AQuery.query(AQuery.java:86) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:257) at org.basex.core.Command.execute(Command.java:95) at org.basex.gui.GUI.exec(GUI.java:471) at org.basex.gui.GUI.access$3(GUI.java:425) at org.basex.gui.GUI$6.run(GUI.java:413)

2 7

Cross-Origin Resource Sharing ( CORS) not available in jetty version 8
by Rob Stapper 25 Feb '17

25 Feb '17

Hi Christian, I'm trying to build a web based frontend with Angular(2) with Basex as backend. Since Angular uses localhost:3000 and basex uses localhost:8984 I need CORS to be activated in the bachend's jetty-service. If I try to activate this by editing the web.xml file I get the message from the jetty that this service is not available. Obviously version 8 of jetty does not support CORS. According to the documentation Jetty 9 should support CORS. Is replacing jett 8 with version 9 somewere on the agenda? Or can I do this myself? (new area for me) I wouldn't mind testrunning it. TIA, Rob Stapper PS. I see the request the request being handled and send back by the backend (basex) but it misses the necessary header. Debugging my Angular app in the browser say that CORS-header is missing.

4 4

BaseX 8.6.1
by Christian Grün 24 Feb '17

24 Feb '17

Dear all, A new minor update of BaseX is available (version 8.6.1, see [1] for more details). If you use BaseX with many users in parallel, we recommend you to switch to this version, which provides an improved locking strategy for excessive parallelism. Have fun, and (just in case) a nice weekend, Christian PS: Thanks everyone for the interesting mailing list discussion on XQuery in commercial environments. The good thing: Once you convince your customers or CTOs that XQuery is an attractive alternative, and once your project is a success, they usually want to realize everything with XQuery, no matter if it makes sense... Keep on going, don't give up too early! [1] https://github.com/BaseXdb/basex/blob/master/CHANGELOG

2 1

Gzip/RESTXQ
by meumapple 23 Feb '17

23 Feb '17

Hi All, I am wondering whether for RESTXQ one should enable gzip encoding to improve data transmission: if the database is used for storage (where the data are in binary form), is the gzip option still useful? Best, Joseph

4 6

BaseX schema aware
by Leo Studer 23 Feb '17

23 Feb '17

Hello I am wondering whether there are plans to make BaseX schema aware? Thanks for considering Always Leo

2 1

base-uri() changed answer around v8.5
by Amanda Galtman 23 Feb '17

23 Feb '17

Hi, I'm seeing different results from base-uri() in BaseX 8.4 vs. 8.5.2. I believe the 8.4 answer is correct and the 8.5.2 answer is incorrect. Here is an example, and there is nothing special about the particular folder or XML file I used. base-uri(collection("file:///C:/Program%20Files%20(x86)/BaseX8.4/webapp/WEB-INF")/*[*:display-name]) BaseX 8.4 result: file:///C:/Program%20Files%20(x86)/BaseX8.4/webapp/WEB-INF/web.xml BaseX 8.5.2 and 8.6 result (notice "WEB-INF/" is missing): file:///C:/Program%20Files%20(x86)/BaseX8.4/webapp/web.xml Saxon agrees with BaseX 8.4. Thanks, Amanda

2 4

count(//elem) not optimized, even though `elem` is in the index
by Gioele Barabucci 22 Feb '17

22 Feb '17

Hello, I was stressing the BaseX 8.6 planner/optimizer when I noticed that expressions like `count(//elem)` are not optimized at all, even though they are correctly indexed, as demonstrated by `index:element-names()`. The current database is a 300 MB TEI document. All the elements are in the `http://www.tei-c.org/ns/1.0` namespace. The following test case will report the correct number, but it will take a couple of seconds to run, instead of a few milliseconds. ``` declare namespace tei="http://www.tei-c.org/ns/1.0"; let $n := index:element-names("monier")[. = 're']/@count let $c := count(//tei:re) return <res><in-index>{$n}</in-index><in-doc>{$c}</in-doc></res> ``` I wonder if the presence of the namespace somehow confuses the optimizer. The same problem can be observed running the same test case with ``` declare default element namespace "http://www.tei-c.org/ns/1.0"; [...] let $c := count(//re) ``` Regards, -- Gioele Barabucci <gioele.barabucci(a)uni-koeln.de>

3 5

XSLT caching
by Tom De Herdt 19 Feb '17

19 Feb '17

Hi all, I'm evaluating BaseX as an alternative (and very attractive) platform for an XML/XSLT-based website that needs to be migrated from ASP.NET. The website relies heavily on XSLT. Each page is generated on-the-fly with Saxon.NET, using a complex set of stylesheets. To get reasonable performance, stylesheets are compiled on first use and cached for subsequent requests. This is crucial, as XSLT compilation is typically orders of magnitude slower than execution; without caching, the server would spend most of the time compiling the same stylesheets over and over again. I was happy to find that BaseX can use Saxon, but as far as I can see, xslt:transform() does not cache compiled stylesheets. Can anyone confirm this? If not, are there any plans to support stylesheet caching in the future? Or is there a way to reuse compiled stylesheets manually? Thanks, Tom De Herdt

2 7

Allowing for comments in code...
by France Baril 18 Feb '17

18 Feb '17

I was wondering if it would be possible to either: * Allow for an omit-comment option in HTML5 serializer * Allow for {(: Nothing but a comment :)} in xquery code. I often have long pieces of HTML to output and clients don't want me to output them with the result. However, I can't use {(::)}. I have been using useless code around my comments just to get around this issue: { let $t := '' return $t (: The comment I can't leave without the bogus code:) } Thanks! -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com

3 6

in memory
by Patrice Drolet ift.a., MD 17 Feb '17

17 Feb '17

Hello, I am trying to use the option MAINMEM to get faster access to data. I can’t make it work. How to use this option in java? When it is set, I get an error with new CreateDB(dbname).execute(context); Thanks, Patrice Drolet

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