BaseX-Talk

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13 participants
5244 discussions

RegExp bug
by Mark Boon 09 Jan '12

09 Jan '12

It's been a while since I did anything with BaseX. The last version I used was BaseX 6.5. Today I downloaded the latest version 7.0.2 and ran into a problem when trying to revive an old project. I get messages saying " [FORX0002] Invalid escape character: '\b'". Since the use of \b is rather essential to my project I had little choice but to investigate, so I retrieved the BaseX source code to see if I could determine the problem. I found the following in RegEx.java, line 88: if("0123456789cCdDniIrsStwW|.-^$?*+{}()[]\\".indexOf(c) == -1) REGESC.thrw(input, c); I believe that's a mistake and should include 'b' and read: if("0123456789bcCdDniIrsStwW|.-^$?*+{}()[]\\".indexOf(c) == -1) REGESC.thrw(input, c); When I make that modification my program works again as before. There may be more missing? I'm not especially a RegExp expert. And I'd like to make sure this modification didn't inadvertantly break something else that I just haven't noticed yet. Mark Boon

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Spatial XQuery?
by Schildmann, Ingo 09 Jan '12

09 Jan '12

Hi, Our company evaluates BaseX for our project. A new requirement is to show spatial data with a geographic information system. Are there any plans for a spatial xquery module for querying GML like the (experimental) module in eXist? http://exist-db.org/extensions.html#module_spatial Regards, Ingo Dr. Karb Informationstechnologien Im Wolfer 10 70599 Stuttgart Tel.: 0711 - 4 51 24 - 70 Fax: 0711 - 4 51 24 - 55 Web: http://www.karb.de <http://www.karb.de/> Mail: schildmann(a)karb.de <mailto:schildmann@karb.de> Skype: ischildmann

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function to give the current file being processed?
by jidanni＠jidanni.org 07 Jan '12

07 Jan '12

{comment {"Made by noise.xq, will get OVERWRITTEN"}} gives me $ basex noise.xq <?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://www.opengis.net/kml/2.2">  <Document>... Is there any function to enable me not to need to hardwire the name into the file?

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basex with ext3 vs ext4, [kjournald]
by Adrian Hossu 07 Jan '12

07 Jan '12

Hi all, I'm been running basex on two environments, one is my laptop with an SSD drive and ext4, the other is a server with raid-1 HDD and ext3. Using iotop, I am watching the disk access of the server and laptop, and comparing the two. After some update queries, I notice that the server (ext3) has a process, [kjournald], which writes for about 20 seconds at 600-1000KB/sec. This only begins after the update is complete and the java process actually stops writing. I am not experiencing such a thing on my laptop. If I do too many of these queries on the server, it will eventually hang for 20-30 seconds. I've copied the exact data on both the laptop and the server. Are there any recommended filesystem types for basex? Does it sound like I've configured something incorrectly, or should I add some more drives to my server and have them using ext4? Or is the difference SSD vs HDD? I never saw my SSD write speed go above 200KB/sec or so during the same queries. Any help would be greatly appreciated! - Adrian

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Re: [basex-talk] Query Across/Many XML Files With BaseX
by Lukas Lewandowski 02 Jan '12

02 Jan '12

Hi Jon, Currently I work on querying distributed XML collections. Therefore I tested also the local BaseX instance (without distribution) for some query performance. My used collection consists of about 1,600,000 XML news articles, each 10 KB size. One of my queries searches for news articles which contain a special keyword (using the full text index). It takes about 100ms for the evaluation. Happy new year. Lukas On 01.01.2012, at 22:53, Jon Morehouse wrote: > Hello Lukas, > Thanks for your response. I am simply looking at storing text in my xml articles. I would be recreating articles with xml and all pictures would be hyperlinked on an external server. I would say each file would be no larger than say 20 kB max. > I am also looking at simply recreating a localized search engine. In terms of scalability, in your opinion, do you think that Basex would be more sufficient for scaling and searching through content. I am hoping my local database grows to hold hundreds of thousands, maybe millions of articles and would like to access any single article by searching with keywords for my users. > > Anyways, I appreciate your response. Have a good new year. > > > > > Jon Morehouse > Moeller High School Class of 2009 > Pepperdine University 2009-2010 > University of Southern California Class of 2013 > > > <Signature Final (2).jpg> > > On Jan 1, 2012, at 8:59 AM, Lukas Lewandowski wrote: > >> Hi Jon Morehouse, >> >> You can use BaseX to create a database (a collection) of all your XML files. You can find some information here [1]. >> Additionally you can create a full-text index to support fast access of keywords within text nodes, see also [2]. >> >> Afterwards you can access/query your database e.g., using the REST API [3] or a client API [4,5]. >> >> Which size does one XML file have? >> >> regards >> Lukas >> >> [1] http://docs.basex.org/wiki/Commands#CREATE_DATABASE >> [2] http://docs.basex.org/wiki/Full-Text >> [3] http://docs.basex.org/wiki/REST >> [4] http://docs.basex.org/wiki/Clients >> [5] https://github.com/BaseXdb/basex-api/tree/master/src/main/php >> >> >> On Jan 1, 2012, at 9:12 AM, Jon Morehouse wrote: >> >>> I am new to BaseX and am excited to be moving forward with this product. Right now I am setting up a website where I want to be able to query across millions of xml files. For instance, if each file contains different keywords, I would like to query across each file to match them with a list of say, my top 50 keywords, to find which files have the most keywords present, the most amount of times. Would something like this be possible with basex? It seems like it would be a simple xquery piece using php (the list of keywords is coming from mysql) but with each xml being its own xml file, would it be possible to search across each and every database/file. >>> >>> >>> >>> >>> >>> Jon Morehouse >>> Moeller High School Class of 2009 >>> Pepperdine University 2009-2010 >>> University of Southern California Class of 2013 >>> >>> >>> <Signature Final (2).jpg> >>> >>> _______________________________________________ >>> BaseX-Talk mailing list >>> BaseX-Talk(a)mailman.uni-konstanz.de >>> https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >> >

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Query Across/Many XML Files With BaseX
by Jon Morehouse 01 Jan '12

01 Jan '12

I am new to BaseX and am excited to be moving forward with this product. Right now I am setting up a website where I want to be able to query across millions of xml files. For instance, if each file contains different keywords, I would like to query across each file to match them with a list of say, my top 50 keywords, to find which files have the most keywords present, the most amount of times. Would something like this be possible with basex? It seems like it would be a simple xquery piece using php (the list of keywords is coming from mysql) but with each xml being its own xml file, would it be possible to search across each and every database/file. Jon Morehouse Moeller High School Class of 2009 Pepperdine University 2009-2010 University of Southern California Class of 2013

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Re: [basex-talk] HTTP Request returns 413 FULL. Where is configuration file?
by Lukas Lewandowski 31 Dec '11

31 Dec '11

Good news. Lukas On Dec 31, 2011, at 2:08 AM, France Baril wrote: > I had not try, and though I still haven't, I think that has just answered my question… since it lead me to read this: "Maximum URL length is 2083 characters". Src: http://www.cs.tut.fi/~jkorpela/forms/methods.html#exc. > > > > On Wed, Dec 28, 2011 at 2:32 PM, Lukas Lewandowski <lukas.lewandowski(a)uni-konstanz.de> wrote: > Did you try to send your query via POST? > > > On Dec 28, 2011, at 5:24 PM, France Baril wrote: > >> I use Ruby >> The request is: >> searchquery = searchquery + s_paramlist >> uri = URI.parse("http://localhost:8984/rest/KnowledgeBase/Content?query=" + searchquery ) >> http = Net::HTTP.new(uri.host, uri.port) >> request = Net::HTTP::Get.new(uri.request_uri) >> request.basic_auth("user1", "user1") >> response = http.request(request) >> # decode allows query to return %26 and ruby to understand '&' as not '&' >> result=URI.decode(response.body) >> if (response.code != "200") >> @search = "ERROR: " + response.code + ' ' + response.message >> else >> @search = result.html_safe >> $currentsearch = @search >> end >> The query works when the list of topics under 'limit to' is short, not when it's long: >> xquery version "1.0"; >> declare variable $kwoperator as xs:string := "all"; >> (:For each topic type, create box:) >> <div style="font-size: 10pt;"> >> <form action="start" method="get"> >> <div> >> <input type="text" name="keywords" value="Search for..." size="42"/> >> {if ($kwoperator ='any') then >> <span><br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="all" /> Contains <b>all</b> these words <br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="any" checked="yes"/> Contains <b>any</b> of these words <br/> >> </span> >> else >> <span><br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="all" checked="yes" /> Contains <b>all</b> these words <br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="any" /> Contains <b>any</b> of these words <br/> >> </span> >> } >> <input class="submit" type="submit" value="Search" /> >> <br/> >> </div> >> <div> >> <p><i>Limit topics to:</i></p> >> { for $x in distinct-values(//*[contains(@class, ' topic/topic ')]/name()) >> order by $x >> return <span>{"%26%23160%3B%0D%0A"}<input type="radio" name="topic" value="{$x}" />{concat(' ', $x)}<br/></span> >> } >> <input class="submit" type="submit" value="Refine" /> >> <br/> >> </div> >> </form> >> </div> >> >> Thanks, >> >> France >> >> On Wed, Dec 28, 2011 at 6:22 AM, Lukas Lewandowski <lukas.lewandowski(a)uni-konstanz.de> wrote: >> Hi France, >> >> I have several questions: >> >> What HTTP client do you use? >> Which HTTP method do you use? How does the request look like? >> How big is your data you want to store/request? >> >> regards >> Lukas >> >> On Dec 28, 2011, at 12:41 AM, France Baril wrote: >> >> > Hi, >> > >> > After about 2620 characters on a response for an HTTP:Request, I get a 413 FULL error. >> > >> > I looked at the .basex configuration file and at the httpserver startup options, but couldn't find a way to change configuration for response size. >> > >> > Should I be looking for the Jetty config? I searched for jetty.xml, but only found it under olderapp/jetty.xml. Nothing that resemble 'baseX/jetty.xml'. >> > >> > Do you know how I can resolve this issue? >> > >> > I'm on Mac OsX - Snow Leopard. >> > >> > Thanks, >> > >> > France >> > >> > _______________________________________________ >> > BaseX-Talk mailing list >> > BaseX-Talk(a)mailman.uni-konstanz.de >> > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >> >> >> >> >> -- >> France Baril >> Architecte documentaire / Documentation architect >> france.baril(a)architextus.com >> (514) 572-0341 > > > > > -- > France Baril > Architecte documentaire / Documentation architect > france.baril(a)architextus.com > (514) 572-0341

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HTTP Request returns 413 FULL. Where is configuration file?
by France Baril 28 Dec '11

28 Dec '11

Hi, After about 2620 characters on a response for an HTTP:Request, I get a 413 FULL error. I looked at the .basex configuration file and at the httpserver startup options, but couldn't find a way to change configuration for response size. Should I be looking for the Jetty config? I searched for jetty.xml, but only found it under olderapp/jetty.xml. Nothing that resemble 'baseX/jetty.xml'. Do you know how I can resolve this issue? I'm on Mac OsX - Snow Leopard. Thanks, France

2 1

one text item per line output
by jidanni＠jidanni.org 26 Dec '11

26 Dec '11

Do I really need to do all this just to get one item per line $ basex -s format=no -q 'doc("...")//.../*:name/concat(text(),"
")' AM 594 復興1 AM 612 中央 AM 630 台灣 AM 657 正聲 I use -s format=no to turn off spaces. -s format=text not much help. There really ought to be a -s option to say I want newlines instead of spaces. In perl all we need is perl -l. OK, maybe Windows users also need CRLFs (\r\n).

2 4

jdbc driver
by Francesco Beretta 26 Dec '11

26 Dec '11

Hi, I'm trying to initialize a connection to a postgresql database : Query: sql:init("org.postgresql.Driver") Error: [FOSQ0007] Could not initialize specified driver: 'org.postgresql.Driver' What is the right syntax to initialize the driver? Could you provide me with an exemple ? Where should I put the jdbc driver jar ? Many thanks Francesco Beretta

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