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

Re: [basex-talk] Problems connecting to the database
by Christian Grün 30 Mar '10

30 Mar '10

Hi Daniel (cc to mailing list), > wow, this where a quick response :) ..you're welcome. >> Hm, didn't experience this before; have you tried BaseX on another >> machine, or user other ports? > > Tried it on my pc and on the server, same result. > >> By the help of your mail, I noticed that our documentation was >> out-of-dated; you need to specify -n instead -s (or try -h for help). >> I've updated our docs. Next, just to get sure, verify if port 7000 is >> opened on your server machine. > > Thank you for that, found out port 7000 where not open by default, and > corrected that. > > With no change in the BaseXServer behavior, I where expecting som sort > of console to controle the server with, but that will not happen? You can throw in the -i argument to end up in the console mode. Note that all admin commands can as well be used from another client, which is logged in with admin rights. > I solved another problem I got an now the Client code ask for login > and password, but now it just times out every time I try to log on. So you're getting a "Timeout exceeded." message? Hm, this would indicate that the server isn't reachable. Are you sure the ports are opened and available? > When I am logging on I am able to use the default admin/admin > login/password right? > My CentOS server, where the BaseX server is, have a password for every > user but If I have opened the port I dont need to go through any proxy > there, I just use admin/admin? …exactly, admin/admin is the default login. You may adjust the admin password or add more users in the next step. Christian > > ~DWP > > 2010/3/26 Christian Grün <christian.gruen(a)gmail.com>: >> Hi, >> >>> java -cp BaseX6.jar org.basex.BaseXServer -p 7000 >>> >>> To set up a server listening on port 7000. And i says "BaseX 6.0 >>> [server] \n Server was started" and not as it says in the guide >>> "Waiting for requests...", is that a problem? >> >> Hm, didn't experience this before; have you tried BaseX on another >> machine, or user other ports? >> >> >>> java -cp BaseX6.jar org.basex.BaseXClient -s [ip on my server] -p 7000 >>> >>> to try connecting, but then it just displays the help message and are >>> not doing anything. I am expecting a new console where I where able to >>> write commands to my baseX server, is that not the intention? >> >> By the help of your mail, I noticed that our documentation was >> out-of-dated; you need to specify -n instead -s (or try -h for help). >> I've updated our docs. Next, just to get sure, verify if port 7000 is >> opened on your server machine. >> >> Christian

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xquery replace
by Travis Webb 28 Mar '10

28 Mar '10

I am trying to use xquery replace but cannot, it seems, figure out the correct syntax. As I understand it, the replace query should be of the form: "xquery replace expr with node", so I'm trying to do the following: > xquery replace root()/child with <child>new data</child> Stopped at line 1, column 15: Syntax: XQUERY [query] Evaluate XQuery. I've tried a number of variations but I get the same error. Any ideas? Thanks. -tjw

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How to address a document inside a basex database?
by Sandra Maria Silcot 28 Mar '10

28 Mar '10

Hi all, I have a large database of about a dozen separate xml files. When I use the GUI interface, I can see them all in the graphical display, and as I pass the cursor over elements, it displays doc("om.xml")/... But when I try that in a query (the database is open), I'm told: FODC0002 File or directory C:/servers/basex/om.xml not found The basex installation is at C:/servers/basex and the currently opened database ("fasdb"), which was loaded from file 'om.xml' and others on a different machine, and downloaded, lives here: C:/servers/basex/BaseXData/fasdb How can I refer just to one document from that db in a query e.g. let $persons := doc("om.xml")//person Forgive me if this is a basic error on my part, I am still learning. I have tried variations on the basex:db construct, but all give a file not found error. If I move the document to where it is looking, basex builds a new db, not what I want at all! I'm sure there is a simple solution but I cannot see it. Any clues much appreciated. Cheers all, Sandra

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Problems connecting to the database
by Daniel .Petersen 26 Mar '10

26 Mar '10

Hay Just started using baseX and have uploaded til executable .jar file to my server. Then i use the command: java -cp BaseX6.jar org.basex.BaseXServer -p 7000 To set up a server listening on port 7000. And i says "BaseX 6.0 [server] \n Server was started" and not as it says in the guide "Waiting for requests...", is that a problem? My intention is to be able to connect to my BaseX DB with a client from my pc to the server where the DB is. Then I on my pc run the command: java -cp BaseX6.jar org.basex.BaseXClient -s [ip on my server] -p 7000 to try connecting, but then it just displays the help message and are not doing anything. I am expecting a new console where I where able to write commands to my baseX server, is that not the intention? Thanks in advance for reading this and I hope for a quick answer. ~DWP

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XPath or ID for node
by Perry Trolard 26 Mar '10

26 Mar '10

Dear List, I wonder if there's a method in BaseX for getting a unique identifier for a node. If I had a document in memory & was using, say, Saxon, I'd call a method on the node to return its location as an XPath string, but using XQuery in BaseX, is there a "somefn" such that for $d in $doc//date return <result path="{somefn($d}">{$d}</result> would return <result path="/root/date[5]"><date when="2010-03-25"/></result> or some such? I understand that nodes are identified internally in BaseX by their pre-order traversal index – is there a way get the pre number? If not directly from an XQuery function, perhaps in some of the Java client code? My use case is that I'd like to return elements – <date>'s, e.g. – with info about their location in the document so that later & on-demand I can get more info about certain dates – ancestor elements, &c; so, in short, I'd like to get a handle on the node for later retrieval. Thanks, Perry Trolard

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xqresultsequence : retrieve item as node or string?
by Travis Webb 23 Mar '10

23 Mar '10

I have a question regarding efficiency in the xqresultsequence in the XQJ API. I've found no documentation on how this object is actually represented. Does anyone know if it is faster to request the result as a string (getItemAsString(null)) or as a DOM node (getNode())? Any info is appreciated. Thanks. -tjw

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Re: [basex-talk] problems with fn:root function and comparision
by Jiří Kadlec 22 Mar '10

22 Mar '10

Hi Christian, thanks for your help. I tried using is operator instead of = and now I got expected result, but I got error with comparsion where true should be returned. i.e when I call fn:root(/test) is /test which should return true, but it returns false. I'm using same simple XML. <?xml version='1.0' encoding='UTF-8'?> <test> <nodes> <node></node> </nodes> <nodes2> </nodes2> </test> Is there something above /test some "super root"? I have checked what returns each command and the result is the same. for both, but when I check tree map window in base-x gui I found out that fn:root(/test) select my.xml and /test select test node directly. Is this a right behaviour? Thanks again for quick and helpful responses Jiri > Hi Jiří, > > "=" is a »general comparison« operator, which compares the atomized > values of your left and right operands. So-called »node comparison« > operators will give you the expected result: > > fn:root(/test/nodes) is /test/nodes > > More details in the specs: http://www.w3.org/TR/xquery/#id-node-comparisons > > Christian > > > On Fri, Mar 19, 2010 at 5:12 PM, Jiří Kadlec <jir.kadlec at post.cz> wrote: > > Hi guys, > > > > I'm having a trouble with using fn:root function. I want to check if given > XPath selects root node. So i decided to do it with following > > > > for eg. /test/nodes - is example XPath chosing non root element and i want to > check if this is root element byt running one of these statements > > > > fn:root(/test/nodes) = /test/nodes or fn:root() = /test/nodes > > > > both of these return true on following document: > > > > <?xml version='1.0' encoding='UTF-8'?> > > <test> > > <nodes> > > <node></node> > > </nodes> > > <nodes2> > > </nodes2> > > </test> > > > > when I run just first part of statement fn:root(/test/nodes) I get: > > <test> > > <nodes> > > <node/> > > </nodes> > > <nodes2/> > > </test> > > > > which is ok when I run separately /test/nodes i got this: > > <nodes> > > <node/> > > </nodes> > > > > it's also ok but when I try to compare it together I get false which is > definitelly not OK. > > i.e fn:root(/test/nodes) = /test/nodes .... returns true > > > > Am I doing something wrong or it's a bug in base-X. I have tried also last > BASE-X 6.03 and I'm having same problem. > > > > Thank you for help > > > > Jiri > > ___________________________ > > Christian Gruen > Universitaet Konstanz > Department of Computer & Information Science > D-78457 Konstanz, Germany > Tel: +49 (0)7531/88-4449, Fax: +49 (0)7531/88-3577 > http://www.inf.uni-konstanz.de/~gruen > > > >

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problems with fn:root function and comparision
by Jiří Kadlec 19 Mar '10

19 Mar '10

Hi guys, I'm having a trouble with using fn:root function. I want to check if given XPath selects root node. So i decided to do it with following for eg. /test/nodes - is example XPath chosing non root element and i want to check if this is root element byt running one of these statements fn:root(/test/nodes) = /test/nodes or fn:root() = /test/nodes both of these return true on following document: <?xml version='1.0' encoding='UTF-8'?> <test> <nodes> <node></node> </nodes> <nodes2> </nodes2> </test> when I run just first part of statement fn:root(/test/nodes) I get: <test> <nodes> <node/> </nodes> <nodes2/> </test> which is ok when I run separately /test/nodes i got this: <nodes> <node/> </nodes> it's also ok but when I try to compare it together I get false which is definitelly not OK. i.e fn:root(/test/nodes) = /test/nodes .... returns true Am I doing something wrong or it's a bug in base-X. I have tried also last BASE-X 6.03 and I'm having same problem. Thank you for help Jiri

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Re: [basex-talk] Well done!
by Christian Grün 18 Mar '10

18 Mar '10

Hi Erik, all of your suggestions are more than welcome – this is why I posted your answer back to the mailing list. I invite all of you to give personal feedback! > A few questions for you about basex and plans... > 1) Can a database store files other than xml? xqy/xql, images, js, css, etc? Our storage is currently limited to well-formed XML documents. > 2) Any plans to add collections or may basex does and I've overlooked it? Yes, BaseX supports collections – as long as they are flat. Databases can store multiple single documents, which can be accessed e.g. by the XQuery collection() function. See also Section 4.4 in http://basex.org/faq. > 3) ReST interface: There are two approaches, both have their benefits and I would like to see both available: > a) The rest interface allows manipulating db resources: dbs, collections, files, users, permissions, etc. (The eXist db does this.) > -The main advantage with this is an API easy to integrate into many environments > b) The rest interface allows requests to be rewritten to a delegate xquery file to handle processing the http methods. (Some other db's provide this.) > -This allows building complete applications within a database. > -Would like to see this as the base approach with (a) as an internal implementation of (b) > What are your thoughts? Interesting ideas.. Some of our current interface features are be inspired by eXist. While GET and POST can be used to send XQuery/Update requests, PUT and DELETE will allow to modify database instances. Here is a simple example how a GET request could look like: http://localhost:8080/rest/db/factbook?query=//country Additionally, we will allow to send BaseX database commands via GET and POST.. http://localhost:8080/rest/db/factbook?command=optimize This way, user management can be handled via REST as well. I'm not sure how users are modified in eXist via REST? Which other XML/REST implementations have you worked with? > 4) Any plans for webdav? This makes moving files in and out of the db easy for non-technical users. I've briefly looked at doing this with milton, apache jackrabbit, and from scratch. > 5) What do you think about using OSGI to enable plugging in db services? Bundles would be something like dbServer (the core service), tcpServer, restAdminServer, restServer, webdavServer, webAdmin, cliAdmin, monitorServer clusterServer, etc. This keeps the dbServer core code clean and small, yet allows other services to be developed and evolve independently. It also allows spinning up multiple instances of a server. For example, I could spin up multiple restServers or tcpServers on different ports to segment applications, or multiple webdav servers to partition content management per user/group rights. > 6) What do you think about moving to github? Looking for ways to grow basex community more quickly. Good suggestions.. Let's see what everyone thinks about it! > Hope you don't mind me jumping in. I see a great product whose continued and expanded development is important to this industry. You are welcome, Christian ___________________________ Christian Gruen Universitaet Konstanz Department of Computer & Information Science D-78457 Konstanz, Germany Tel: +49 (0)7531/88-4449, Fax: +49 (0)7531/88-3577 http://www.inf.uni-konstanz.de/~gruen

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help required for xquery
by Ganesh K 18 Mar '10

18 Mar '10

Hello, Attached is xquery which i used. I tried using the xquery it halts with error Stopped at line 1, column 8191: [XPST0003] Expecting ">". i did try adding one more } as escaping. Need some help. I am using PHP to do so. Will try this in java later. Awaiting your quick reply. Thanks Ganesh K

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