December 2016 - BaseX-Talk - mailman.uni-konstanz.de

Preparing BaseX 8.5.4 (please don't forget Issue #1341)
by Jan Dölle 20 Feb '18

20 Feb '18

Hi, we noticed you prepare release 8.5.4. Please don't forget to fix issue: SQL with BaseX 8.5.3 #1341 Thx Jan -- Jan Dölle E-Mail: basex-list(a)id1.de Telefon +49-69-244502-0 Home: www.id1.de Information Design One AG, Baseler Straße 10, 60329 Frankfurt am Main Registereintrag: Amtsgericht Frankfurt am Main, HRB 52596 Vorstand: Robert Peters, Aufsichtsrat: Christian Hecht (Vorsitz)

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standalone vs GUI character parsing
by Bridger Dyson-Smith 13 Jun '17

13 Jun '17

Hi all - I'm able to create a database with the GUI from an XML document that contains an invalid character (U+0000) -- I guess BaseX does some character scrubbing, which is awesome :). When I try creating a database with the same input XML document from the commandline (using the basex executable), I get an error message. Here are my commands in standalone mode: BaseX 8.5.3 [Standalone] Try 'help' to get more information. > create db test-bad-char /usr/home/bridger/src/another-test.xml "/usr/home/bridger/src/another-test.xml" (Line 4): An invalid XML character (Unicode: 0xb) was found in the element content of the document. > xquery db:create("test-bad-char", "/usr/home/bridger/src/another-test.xml", "/usr/home/bridger/src/", map { "chop": false() }) Stopped at ., 1/10: [FODC0002] "/usr/home/bridger/src/another-test.xml" (Line 4): An invalid XML character (Unicode: 0xb) was found in the element content of the document. > This isn't a surprise (I'm more surprised (pleasantly) by the GUI behavior); is there a way to apply the same "scrubbing" from the GUI in standalone mode? I'm sure there is, but I'm not able to figure out which option to apply. As always, thank you for your time and trouble, and thanks for BaseX. Best, Bridger

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Tail Recursion Error on startup
by buddyonweb-software＠yahoo.com 11 Mar '17

11 Mar '17

When we start up BaseX (whether the server or the GUI) and run a particular a query against a particular .xqm file, we always get a tail recursion error. Error:[bxerr:BASX0005] Stack Overflow: Try tail recursion? If we attempt to execute it again (sometimes twice, but have done so repeatedly up to 5 times), the error goes away and all is fine. Is there anything you can suggest or anything we can provide you to see how to eliminate this. This is particularly problematic on our server when we reboot our production application.Anything you can suggest or anyway we can help is much appreciated. Buddy

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Images
by meumapple 03 Jan '17

03 Jan '17

Hi All, Is there a way to access images in BaseX as sequences of pixels? Thanks. Joseph

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Namespaces in element constructors
by Bridger Dyson-Smith 02 Jan '17

02 Jan '17

Hi all - I think that I weak grasp of the practical requirements, but I'm unable to find a reference in the spec to clarify what's happening in the following: I have a constructor: return( for $item in $file-list let $item-less := replace($item, '^\d{1,}-', '') (: returns "missing" supplemental files :) where ($item-less[(not(. = ($files-titles, $excludes)))]) or ($item-less[(. = $files-titles)]) return( <relatedItem> <title>{$item-less}</title> <mimeType> {if ($item-less = $files-titles) then ($content/files/file/name[. = $item-less]/following-sibling::mimetype/text()) else (fetch:content-type(concat(file:parent(document-uri($doc)),$item)))} </mimeType> <uri>{file:parent(document-uri($doc))}</uri> </relatedItem> ) ) and it works fine so long at the <relatedItem> is not namespaced. As soon as the <relatedItem> is namespaced; e.g. <relatedItem xmlns=" http://bridger.net">, then I need to use the following XPath in the `then` keyword: ($content/*:files/*:file/*:name[. = $item-less]/following-sibling::*:mimetype/text()) The input documents (in the SSCCE, under sample-data/*/metadata.xml) are not in a namespace. Would someone mind providing some context for the "why" here? I've been looking through Priscilla Walmsley's 2nd edition, and the specification, but haven't been able to find an answer. I'm almost certainly looking for the wrong thing(s). Any help will be greatly appreciated! Thank you in advance. Best, Bridger

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Schema Validation issues
by George Sofianos 02 Jan '17

02 Jan '17

Because of issues with schema validation (can't properly use doc() in the validate function - see https://github.com/BaseXdb/basex/issues/1324) I'm not using BaseX to do schema validation in my workflow. But I needed it today to make some result comparisons with my own implementation of XML Validator, and I noticed that using the beta Xerces version which is documented in the wiki <http://docs.basex.org/wiki/Validation_Module#XML_Schema_Validation> can make it crash, so I thought I should report it here. Other than that, I noticed one some XML files that it only reports fatal errors, and hides any other non-fatal error. I think it has something to do with the process <https://github.com/BaseXdb/basex/blob/86a12cf0c75010b3058c18f81c4689bc511b7…> method but I'm not sure.

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TagSoup and html5 support
by Alexander Shpack 21 Dec '16

21 Dec '16

Hi team! As you know, TagSoup 1.2.1 doesn't support correct HTML5 tag nesting. For example, this string Test will be parsed as But html5 code <aside>Test</aside> will be parsed as is. How to implement in BaseX the html5 support? I've found this project, but not sure that it's possible to add it into basex code https://github.com/UniversityofWarwick/tagsoup-html5 Thanks!

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How to save Table views as spreadsheet
by kalamegham＠gmail.com 21 Dec '16

21 Dec '16

I am new to BaseX which I find as a powerful tool to work on xml data. The BaseX GUI is great. My question is: how can I save the Tables in the visualization as spreadsheet(s). I understand there are multiple views but it should be possible to save them as separate tables or tabs in a single spreadsheet. I apologize if this has been addresses in an earlier talk. I would like to know if there is a way to quickly search the base-talk archives without having to look through them all (arranged by month). Thanks! -R. Kalamegham

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Understanding the WRITEBACK option, help
by Enea Parimbelli 20 Dec '16

20 Dec '16

Dear BaseX folks, I'm having trouble understanding the subtleties of the WRITEBACK option. I found this issue report that seems to describe my case as well but it refers to a rather old baseX version. https://github.com/BaseXdb/basex/issues/848 As I understand it the WRITEBACK option will only work for files directly read from disk and not for those that have been added to a database at time of creation. I have created my database with a input path that already held all the xmls I needed to import: Resource Properties Input Path: /home/enea/tmp/AF PHR extraction ALL DATA Input Size: 74 MB Timestamp: 2016-12-19T08:45:34.841Z Encoding: UTF-8 CHOP: true Does the above still apply to baseX 8.2.3? If the issue has been addressed can you describe how the current implementation works? Is the only workaround to this explicitly calling EXPORT after all the update/insertion/deletion queries to see the modifications reflected in the original files on disk? Thanks for your help, Enea -- *Enea Parimbelli, Ph.D.* Post-doc research fellow | Biomedical informatics lab "Mario Stefanelli" Department of Electrical, Computer and Biomedical Engineering University of Pavia Via Ferrata 5, 27100, Pavia (Italy)

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Waiting for BaseX 8.6?
by Christian Grün 19 Dec '16

19 Dec '16

Hi everyone, I know some of you are waiting for BaseX 8.6, and I promised to make it happen until end of this year. I am afraid we won’t make it in time, but you can definitely expect the new version in January! Until then, as usual, we are looking forward to your feedback on our latest snapshot [1]. All the best, Christian [1] http://files.basex.org/releases/latest/

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