BaseX-Talk October 2012

basex-talk@mailman.uni-konstanz.de

40 participants
47 discussions

id function in BaseX
by Massimo Franceschet 31 Oct '12

31 Oct '12

Hi. I'm trying to use the XPath id function with BaseX (GUI interface) with no success. For instance, I'm querying the bibliographic XML document found at http://users.dimi.uniud.it/~massimo.franceschet/caffe-xml/xpath/xpath-synta… with the id queries written below in this page, for instance, id("M4M05"). The query is parsed correctly by BaseX but the result is always empty. Cheers, Massimo Franceschet

3 4

Navigating a DOM
by Rainer Klute 29 Oct '12

29 Oct '12

Hi, I did some first steps with BaseX, but unfortunately I was not very successful. I have a really large XML file which does not fit into memory, and I would like to navigate it as a DOM. My hope was that I could store it as a BaseX database, retrieve the root element as a org.w3c.dom.Node, and then start navigating down and up the DOM as needed without having to have the whole stuff in memory. I tried something like this: QueryProcessor processor = new QueryProcessor("doc('catalog')/*", context); Iter iter = processor.iter(); Item item = iter.next(); Object node = item.toJava(); According to the debugger the item variable indeed denoted my root element. However, when calling item.toJava() not only that very node was returned. Instead BaseX obviously tried to retrieve the whole DOM – which was just the very thing I wanted to avoid. Am I doing something wrong here? Or is this an unforeseen use case? By the way, I also had trouble getting any result at all. Only with "doc('catalog')/*" I got an item that was not null. When I tried to retrieve all elements named "article" using "doc('catalog')//article" the item was null. I also tried the item.iter() in order to find a node's children. However, it turned out that item().iter().next() == item. And I had quite a tough time fiddling around with the documentation and with the JavaDoc. While the documentation puts a lot of effort into XQuery, it remains unclear to some extend how to do some basic stuff with BaseX programmatically. This is a hurdle for the BaseX beginner. Some more Java examples and explanations would be nice showing how to connect to the database, submit a query and process the result. Currently the examples show only how to dump a query result to System.out. It would be interesting to learn about processing it further – see my troubles with Iter. -- Best regards Rainer Klute

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Bug in document order
by Hans-Juergen Rennau 29 Oct '12

29 Oct '12

Hello, I noticed a little bug concerning document order. Consider this input: === in.xml ==================================== <section> <title>Some title</title> </section> ============================================ and the following query, which (a) extends the contents of <section> by a <para> element (=> $result) (b) and then makes a simple copy of the intermediate result (=> $copy): === problem.xq =============================== let $in := /* let $result := element {node-name($in)} { $in/*, <para>APPENDED ELEMENT</para> } let $copy := element {node-name($result)} {$result/*} return <wrap>{ <result>{$result}</result>, <copy>{$copy}</copy> }</wrap> ============================================= Launching the query basex -i in.xml problem.xq one gets a result in which the contents of $copy are in the wrong order (<para> comes now before <title>, though it should come last). Kind regards, Hans-Juergen The query result: ============================================= <wrap> <result> <section> <title>Some title</title> <para>APPENDED ELEMENT</para> </section> </result> <copy> <section> <para>APPENDED ELEMENT</para> <title>Some title</title> </section> </copy> </wrap> =============================================

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basex on redhat
by bryan rasmussen 29 Oct '12

29 Oct '12

Hi, I'm not very good at redhat(and thus not very good at their repository system and tools) and am trying to install basex on it, I tried sudo yum install basex --enablerepo=* but it says it can't find any repo named basex. What should I do? Mvh, Bryan Rasmussen

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Create DB from query
by bryan rasmussen 26 Oct '12

26 Oct '12

Hi, I have a db that has all of my xml documents, I would like to make a bunch of new dbs based on the document types which map to the document element name so for example if I do the query /LOV I get back 115491 Items, I would then like to put that into a db named LOV. How do I put the outputs of query on one db into another db, and does anyone have some code that would go through every /* and create a db by the name of the document element if that db does not exist and then place the document into that DB - or would that be insanely process intensive (there are 290422 items, 13 document types)? Thanks, Bryan Rasmussen

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Re: [basex-talk] Create DB from query
by bryan rasmussen 25 Oct '12

25 Oct '12

On Thu, Oct 25, 2012 at 4:32 PM, bryan rasmussen <rasmussen.bryan(a)gmail.com> wrote: > thanks that was helpful, but the following > >> for $doc in db:open('DK') >> let $name := $doc/*/name() >> return db:add($name, $doc) > where DK is the name of my db. > > returns > Resource path '' is invalid. > > > I tried for $doc in db:open('DK') let $name := > local-name(doc($doc)) return db:add($name, $doc) > > but that gives a FODC0005 error. Ok I figured out the FODC0005 error, should have realized it, but the other one has me stumped especially considering that for $doc in db:open('DK') return $doc/*/name() outputs all the names of the document nodes no problem. Is there some sort of type conversion that needs to be done? Thanks, Bryan Rasmussen

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bug: cancel = shut down
by Cerstin Elisabeth Mahlow 25 Oct '12

25 Oct '12

Hi, when closing BaseX GUI, you will be asked to save edited files. When you click "cancel", it shuts down immediately. Shouldn't it cancel the closing process but not the application? 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

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Resource doesn't exist… but it does
by France Baril 24 Oct '12

24 Oct '12

Hi, I get this error on a db:retrieve: Stopped at line 175, column 119 in > /Users/archie/BaseXHTTP/How2_StaticHTML.xqm: > [FODC0002] Resource > 'http:/localhost:8984/rest/ImagesAndGlobalContent/global/i_app_available.png' > does not exist. If I copy and paste the path to the .png from the error message into the browser's address, the image is displayed. So the path is correct, and the image seems retrievable. What could possibly cause this error? Note that this used to work… I have not changed line 175 in many weeks. -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com (514) 572-0341

3 4

BaseX as Windows Services
by Raymond Meester 24 Oct '12

24 Oct '12

Right now I am starting BaseX on my Windows developer machine with the command "basexserver -S" so that it's started as a service. Our admin preferred however to use a Java Service Wrapper (he uses YAJSW) because it gives him more options/monitoring and better control on restarts. I think that java service wrappers are a little to comprehensive. Maybe on Windows it's more convenient to let BaseX install as a windows service similar to the way that Jenkins does: https://wiki.jenkins-ci.org/display/JENKINS/Installing+Jenkins+as+a+Windows…

2 2

RegExp Bug S{n,m}
by Andy Bunce 24 Oct '12

24 Oct '12

Hi This expression: replace("aaaa bbbbbbbb ddd ",'(.{6,15}) ','$1@') results in [FORX0002] Invalid pattern: 'Illegal quantifier, lower > upper bound: {6,1}'. Could it be that *S*{n,m} is only accepting single digit n and m? This causes http://stackoverflow.com/questions/3767452/xquery-word-wrap to wildly overwrap. Regards /Andy

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BaseX-Talk October 2012