BaseX-Talk February 2012

basex-talk@mailman.uni-konstanz.de

38 participants
52 discussions

BaseX Antivirus Scan Report on FileCluster.com
by FileCluster Security 26 Feb '12

26 Feb '12

Dear Developer,BaseX has been downloaded and tested by Filecluster Labs on 27 Feb 2012 with today's best antivirus engines: BitDefender Antivirus, Kaspersky Antivirus, NOD32 and Avira Antivirus. The report shows that BaseX has been found clean of any viruses or malware and has been flagged as safe to install. You can find the detailed antivirus scan reports at this page: http://www.filecluster.com/Antivirus-Report/BaseX.html. (if the page isn't working, please allow between 5-30 mins for the cache to refresh) Please keep in mind that we will constantly scan your software with each version update or on-demand, if necessary. We have also displayed a clean award within FileCluster to assure our visitors that BaseX is clean and safe to install.If you feel that this report could add value to your visitors as well, you can use any of the banners presented within the report page. Future development of this feature will depend on feedback, so any suggestions or general feedback are greatly appreciated. Also, mentioning this report onto your blog, news page or press releases is highly appreciated, encouraging us to improve the scanner and extend it even further. If you wish to unsubscribe from receiving such notifications, please contact us via email and let us know. Keep in mind that by unsubscribing, you will never receive any emails from FileCluster again, such as promotions, security reports, community feedback and so on. Don't hesitate to contact us for any issues regarding our security service. Best Regards, Jamie P. - FileCluster Security www.filecluster.com

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BaseX 7.1.2 beta: relative paths within packages
by Andy Bunce 26 Feb '12

26 Feb '12

I have a built an xar package with a xquery source that imports another module. It has three files as follows: ---expath-pkg.xml------- <package xmlns="http://expath.org/ns/pkg" name="apb.pacman" abbrev="lib" version="0.1" spec="1.0"> <title>package tools</title> <xquery> <namespace>apb.pacman</namespace> <file>pacman.xq</file> </xquery> </package> ----------lib/pacman.xq------- xquery version "1.0" encoding "UTF-8"; module namespace q="apb.pacman"; import module namespace p="parser-basex" at "parser-basex.xq"; declare function q:info() { "hello from pacman" }; declare function q:parse($xq as xs:string) { p:parse-XQuery($xq) }; ----------lib/parser-basex.xq------- xquery version "1.0" ... etc -------------------------------- In the GUI I enter: import module namespace q="apb.pacman"; q:info() I get the error: Error: [XQST0059] Module not found: '/home/andy/parser-basex.xq I was expecting p="parser-basex" at "parser-basex.xq" to be resolved relative to pacman.xq in the repo. Is this a bug, or am I misreading the spec? /Andy

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NPE in DataBuilder.stripNS() during RESTPost.run() with rest:context provided
by Charles Duffy 24 Feb '12

24 Feb '12

Howdy -- I'm getting a stack trace putting the following query (exact, unmodified) through the REST POST interface on a BaseX snapshot as of this morning: $ curl -X POST -T - -H 'Content-Type: application/xml' \ http://admin:admin@localhost:8984/rest <<EOF <rest:query xmlns:rest="http://basex.org/rest"> <rest:text> / </rest:text> <rest:context> <root> <foobar:root xmlns:foobar="http://example.com/foobar"> <foobar:b/><foobar:b/><foobar:b/> </foobar:root> </root> </rest:context> </rest:query> EOF Unexpected error: null (yes, it requires _three_ of the <foobar:b/> elements before this happens -- execution is fine with just two) Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.1.2 beta [6/1859] Java: Oracle Corporation, 1.7.0_02 OS: Linux, amd64 Stack Trace: java.lang.NullPointerException org.basex.data.NSNode.delete(NSNode.java:103) org.basex.data.NSNode.delete(NSNode.java:103) org.basex.data.NSNode.delete(NSNode.java:103) org.basex.data.Namespaces.delete(Namespaces.java:198) org.basex.query.util.DataBuilder.stripNS(DataBuilder.java:313) org.basex.api.rest.RESTPost.run(RESTPost.java:121) org.basex.api.rest.RESTServlet.run(RESTServlet.java:64) org.basex.api.rest.RESTServlet.doPost(RESTServlet.java:30) javax.servlet.http.HttpServlet.service(HttpServlet.java:727) ...

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Wrong implementation of the position predicate.
by Tayena Hendrickx 24 Feb '12

24 Feb '12

Dear Basex-team members, I'm a PHD-researcher at the University of Antwerp. For one of the courses I assist we are planning to use BaseX in order to learn students the concepts of Xpath and XQuery. We find that the tool is a good way to illustrate things but I found an error. In attachment I've put the XML file I was testing. It's about students, and it's a very small example file. After importing this file, I want to execute the following XPath expression: /child::students/child::student/child::*/ancestor::* This works well as it gives me all the ancestors namely both 'Student' elements and the 'Students' element. But, when I add the following predicate (see bold part in the expression below) it goes wrong: /child::students/child::student/child::*/ancestor::*[position()=1] What should happen according the XPath rules is: give back the first ancestor. Now, the result of 'ancestor::* is (in reverse document order) the right Student element , the left Student element, Students element The second of this is the left student element. But when you execute this, the result that I get are the TWO student elements, with is wrong. If we change the position to 2, I get the StudentS element, which is also wrong. Is it possible to solve this problem? Further I also have some thought about making the GUI better. It should be good to make a distinction between element nodes, attribute nodes and text nodes in the visual presentation of the XML tree. That makes things much clear for users. If you have further questions regarding this mail, please send them and I'll answer as soon as possible. Thanks in advance! Kind regards, -- Tayena Hendrickx Member of the Research Group Advanced Database Research and Modelling (ADReM) University of Antwerp (UA) Department of Mathematics and Computer Science Campus Middelheim (CMI), Building G, Office G2.33

2 1

importing library with alternative namespace
by Jan Vlčinský (CAD) 24 Feb '12

24 Feb '12

Hi I am really happy to see an option to import xquery library - it shall let me organize my code much better. When testing sample from wiki: http://docs.basex.org/wiki/Packaging I tried to modify proposed instruction: import module namespace functx="http://www.functx.com"; into this, using alternative namespace: import module namespace functxyz="http://www.functx.com"; The import worked well, but when calling functxyz:capitalize-first("test") I got result: Error: [FONS0004] No namespace declared for prefix 'functx'. Questions: Is this ok, that I am forced to use assigned namespace, or is this just some bug in the library I have teested? Or bug in BaseX? With best regards Jan *Ing. Jan Vlčinský* TamTam Research s.r.o. Slunečnicová 338/3, 734 01 Karviná Ráj, Czech Republic tel: +420-597 602 024; mob: +420-608 979 040 skype: janvlcinsky; GoogleTalk: jan.vlcinsky(a)gmail.com http://cz.linkedin.com/in/vlcinsky

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Announcing Nxdb - A .NET Binding for BaseX Focused On Embedded XML Databases
by Dave Glick 23 Feb '12

23 Feb '12

Hi all, I'd like to announce Nxdb, a pure .NET binding for BaseX that is focused primarily on using BaseX as an embedded XML database. It can run under Mono and does not require any Java or JVM support. It is the culmination of several years of work with BaseX on the .NET platform in multiple commercial projects. It introduces an entirely new API focused on direct database node manipulation as well as several other features intended to make the embedded database use case easier. The project portal is here: https://dracorp.assembla.com/spaces/nxdb Please feel free to give it a try and let me know what you think. I'm still working out the best way to document, distribute, etc. so suggestions in that area would be helpful as well. I'm also very interested in ideas on what should be added or improved next. Thanks, Dave

1 0

SQL module in 7.1.1
by Mike Cobo 23 Feb '12

23 Feb '12

Hi, I just installed the new version 7.1.1 and it doesn't recognize the SQL functions. The error is: "Unknown function sql:init()" on the BaseX GUI. With the older version I didn't get this error. Do I need to install a package now in order to use the SQL functions now? Regards, Mike

2 1

Load files to database
by Anh Thuấn 23 Feb '12

23 Feb '12

Hi, baseX team. I have some problems of loading xml files into the database of BaseX. I am comparing the time to load xml files into database, there are 2 ways to load: Loading all the folder into the database and Loading each file into the database. The time to load all the folder and the time to load each file have a big difference. The time to load all the folder into the datebase is 84ms, whereas the time to load each file into the database is 912 ms. I have written the 2 ways to load in C#. The following code is to load all the folder into the datebase: private void CreateDBAndLoadDirectory(string directoryPath) { this.contextDirectory = new Context(); this.serverDirectory = new org.basex.BaseXServer(this.contextDirectory); Set.execute("createfilter", "*" + this.fileExtension, this.contextDirectory); Set.execute("CACHEQUERY", true, this.contextDirectory); Set.execute("SERIALIZE", false, this.contextDirectory); Set.execute("CHOP", true, this.contextDirectory); Set.execute("DBPATH", this.dbPath, this.contextDirectory); new CreateDB(this.dbDirectory, directoryPath).execute(this.contextDirectory); } And the following code is to load each file into the database: private void CreateDBAndLoadFiles(string directoryPath) { this.contextFile = new Context(); this.serverFile = new org.basex.BaseXServer(this.contextFile); Set.execute("CACHEQUERY", true, this.contextFile); Set.execute("SERIALIZE", false, this.contextFile); Set.execute("CHOP", true, this.contextFile); Set.execute("DBPATH", this.dbPath, this.contextFile); new CreateDB(this.dbFile).execute(this.contextFile); string[] fileList = Directory.GetFiles(directoryPath, "*" + this.fileExtension,SearchOption.AllDirectories); foreach (string fileName in fileList) { string path = fileName.Substring(this.otxPath.Length + 1); new Add(path, fileName).execute(this.contextFile); new Optimize().execute(this.contextFile); } } I don't know if I have made mistakes in these codes or not? I want to ask about the fastest way to load each file into the database.

2 1

can output HTML but not read it back in again?
by jidanni＠jidanni.org 22 Feb '12

22 Feb '12

Is it true that basex can output HTML, http://docs.basex.org/wiki/Serialization but not read it back in? http://docs.basex.org/wiki/Parsers

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Re: [basex-talk] GUI stops displaying results when query is too large
by Andy Bunce 22 Feb '12

22 Feb '12

I have seen something similar, maybe it is your case: If I have a database open and I have an updating query in the editor or just referenced from an import module then when I execute the result is displayed for a moment then immediately replaced by the open db display. e.g. import module namespace state="apb.state"; (: this has an update function :) 2 My workaround is just to work with no open db. /Andy > > When the size of the submitted query gets too large, GUI functionality > stops working: Results stop being highlighted in the tree or displayed in > the "text" window (which instead always displays the entire document). I > can run the exact same XQuery file through basexclient or a REST query > and everything works perfectly, so this appears to be strictly a GUI > concern. > >

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BaseX-Talk February 2012