BaseX-Talk March 2013

basex-talk@mailman.uni-konstanz.de

38 participants
59 discussions

Bug (?): Document damaged after db upload
by Hans-Juergen Rennau 29 Mar '13

29 Mar '13

Dear BaseX team, I encountered a strange phenomenon: after loading a document into the database (using db:create), ordinary retrieval yields a phantom with distorted namespaces, like this: <Accommodation xmlns="http://otds-group.org/otds"> <Availabilities xmlns="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://otds-group.org/otds" Key="1Z"> <Availability xmlns="" xmlns="http://otds-group.org/otds" Key="1Z" StartDate="2013-05-01" EndDate="2013-10-31"> <DefaultDayState xmlns="" xmlns="http://otds-group.org/otds"> <Open xmlns="" xmlns="http://otds-group.org/otds"/> </DefaultDayState> </Availability> ... Note the xmlns="", side by side with xmlns="...". This is the query: let $c := *return element {node-name($c)} {$c/*:Availabilities} And this is the (correct) result I obtain if I use as input not the uploaded document, but the original file: <Accommodation xmlns="http://otds-group.org/otds"> <Availabilities xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Key="1Z"> <Availability Key="1Z" StartDate="2013-05-01" EndDate="2013-10-31"> <DefaultDayState> <Open/> </DefaultDayState> </Availability> ... I wanted to reproduce the problem with a minimal input document, but then the error did not occur. The document producing the error has 286 KB. One more remark: after droping all databases and repeating the exercise, the problem still remained. Kind regards, Hans-Juergen PS: If a team member would like to receive the input file, I would send it to him or her directly.

4 6

BaseX: How to create database with attribute indexes using REST
by Willi Firulais 28 Mar '13

28 Mar '13

2 3

BaseX Setting Parameters by REST now working
by Willi Firulais 27 Mar '13

27 Mar '13

2 1

BaseX in the digital library context
by Alexander Holupirek 26 Mar '13

26 Mar '13

Hi, folks! We, the BaseX team, are currently applying for a project in the digital library sector. We have done some work in the context of OPAC and the like, but could still use some (external) references in which BaseX is used inside library management systems, library portals, catalog search engines, or anything that is related to digital libraries. If you have made some good experiences with BaseX in that domain, please speak up and give us a hint - either publicly to spread the word or via PM. Thanks a lot in advance, Alex for the BaseX team

1 0

xquery help
by Cerstin Elisabeth Mahlow 26 Mar '13

26 Mar '13

Hi, I got stuck with an XQuery, could you please help? I have data like this: <collection> <entry> <q>[text() contains text ('Johann' ftand 'Ballhorn') distance at most 5 words ordered][self::*:p or self::*:q]</q> <id>12345</id> bey welchen die Verbesserungen durch Johann Ballhorn öfter vorkommen als man glauben sollte. </entry> <entry>… </collection> All I want to get back is the node with the content of the <q> node applied to using ft:mark, i.e., the node with highlighting like this: bey welchen die Verbesserungen durch Johann Ballhorn öfter vorkommen als man glauben sollte. But I don't manage to call ft:mark with the correct parameters. I tried variants of this: for $i at $p in //entry let $q := $i/q return ft:mark($i $q) But this gives Expecting closing bracket for 'ft:mark(…' I think I have to use concat() in some way, but how? Thanks in advance 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

2 2

[GUI] Properties window is frozen for a DB with a lot of documents
by Fabrice Etanchaud 26 Mar '13

26 Mar '13

Dear all, When dealing with collections containing more than a million documents, The Properties window freezes the entire GUI while trying to display the documents' list. How could I disable the treeview for such collections ? I have to deal with such collections because XQuery Update on many many nodes takes a long long time to complete, So add/replace/delete is a good alternative. Thank you for your continuous help and your great XNDB. Last : is the new ADDCACHE option the way to add data near the node count limit without corrupting the collection ? Best regards, Fabrice Questel-Orbit

3 4

Ask about AlterDB
by truc.cam＠emotive.de 26 Mar '13

26 Mar '13

Dear BaseX team, I want to ask you how to use the class AlterDB to change a database name. It always throws the exception DB_PINNED_X although I use "unpin" before using AlterDB. I found the problem is that the method TableDiskAccess.locked(db, this) always returns "true". Please see the attachment and help me solve the problem. Thanks in advance.

2 10

Re: [basex-talk] BaseX start up questions
by Christian Grün 25 Mar '13

25 Mar '13

> Time to open: 2288 ms > Used memory: 206 MB That’s quite unusual. Here is what I get for an exemplary database with 700 MB of input data and 85.000 documents: Time needed: 18.48 ms Used Memory: 11 MB Maybe it’s due to the updatable index? What do you get if you set UPDINDEX to false? Best, Christian

1 0

Config file and data dir (with BaseXServer in Java)
by Florent Georges 25 Mar '13

25 Mar '13

Hi, When I start a BaseXServer in Java, it creates a config file ~/.basex and a data directory ~/BaseXData. Is there any way to ask BaseX not to create the config file, and to use a specific another data directory? Or at least to tell it where to look for the config file (instead of going to ~/.basex)? I couldn't find either in the documentation. Regards, -- Florent Georges http://fgeorges.org/ http://h2oconsulting.be/

4 8

Re: [basex-talk] BaseX start up questions
by Christian Grün 25 Mar '13

25 Mar '13

Hi Erik, > For testing I created a single database with only 1000 documents > (about 800 KB each) and noticed that memory consumption was around 250 > MB in the GUI tool as soon as I opened the database. to get the real memory consumption, please click on the memory indicator in the lower right corner of the GUI. Next, you can deactivate the visualizations to save some additional memory. > I also noticed that it will take around 1 second to open the database > which could become a problem because I want to use BaseX as the > backend database for a RESTless service where state is not preserved > between HTTP requests. Do you refer to the time that’s required by the GUI, or more low-level calls? Best, Christian

1 0

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BaseX-Talk March 2013