BaseX-Talk

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4 participants
5268 discussions

"Invalid byte 1 of 1-byte UTF-8 sequence." error occurred
by 이창우 22 May '23

22 May '23

Hello? I've been testing BaseX for data backup in a Linux environment for a few months. (Some of the contents are in Japanese.) While using it a while ago, suddenly "Invalid byte 1 of 1-byte UTF-8 sequence." An error has occurred. The content of the file used was fine and was the same as before. I opened this file in VI editor and simply saved and exited. And when I ran the program again, it worked normally. - This file is a compressed xml file in gz format. - The program reads this file, takes the necessary parts, and saves them by passing them to BaseX through the PUT Method. - In this part, "Invalid byte 1 of 1-byte UTF-8 sequence." has occurred. This has been happening for a few hours and I haven't taken any action, but now it's working fine. Is there a part that uses BaseX and can explain why this is happening? Or is it a program problem? Can this problem occur using BaseX? Or is it a problem with the program or the environment? I think it's an encoding problem, but I don't know the exact cause. - The program is made in Java. - Some of the contents of reading and transmitting data are as follows. URL url = new URL(urlTemp); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("PUT"); conn.setRequestProperty("Content-Type", "application/xml"); OutputStream out = conn.getOutputStream(); InputStream in = null; in = new GZIPInputStream(new FileInputStream(filePath)); int len = 0; byte[] readBuffer = new byte[1024]; while ((len = in.read(readBuffer)) > 0) { out.write(readBuffer, 0, len); }

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xquery:eval() - handling of &
by Andrew Sales 11 May '23

11 May '23

Hello, The query xquery:eval( 'contains(.,"&")', map{'':<foo><&></foo>} ) results in: [XPST0003] Invalid entity: '&")...'. I can get the expected result if I double-escape the entity: 'contains(.,"&amp;")' or wrap in a call to serialize: serialize('contains(.,"&")') However, both xquery:eval( 'contains(.,"<")', map{'':<foo><&></foo>} ) and xquery:eval( 'contains(.,">")', map{'':<foo><&></foo>} ) return true, as expected. Is this a bug, or am I missing something? Thanks, Andrew

2 2

BaseX and Fedora 38
by Ben Engbers 28 Apr '23

28 Apr '23

Hi, Today I upgraded my PC to linux Fedora 38. The only problem I encountered is that when trying to start basexgui, my session logs off. I can start the server and the RbaseX-client works well so it probably is only the GUI that's giving problems. Is it possible to see what's causing the failure? Ben Engbers

3 4

JSON serialization
by Giuseppe G. A. Celano 27 Apr '23

27 Apr '23

Hi all! I have a few XML documents, whose content I would also like to provide in JSON. The XML files contain many strings encoded within comments, such as <!--incipit—>, and I would like to transfer such string contents unchanged into JSON. However, I am having a hard time to deal with “-” ( using data(<!---—>) ), which is rendered as “&45;” , and “>”, which is translated into “>”: I tried a lot, but nothing seems to work: is there a way to keep “-” and “>” unchanged while serializing to JSON? Another issue I am experiencing is that, after JSON serialization, the order of the key-values in a map does not follow that specified in my code: I know that the order is not computationally meaningful, but for reading purposes it would make a huge difference in my case, because one key contains a long array of objects and therefore I would like the keys with shorter contents to be serialized before. Ciao, Giuseppe

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Binding multiple items to 1 variable (server protocol)
by Ben Engbers 27 Apr '23

27 Apr '23

Hi, My ultimate goal is to investigate, using a SWI-Prolog client and Basex, whether a combined use of Prolog and XQuery offers advantages. To write a Prolog client, I first had to learn C++ and the spin-off from that is that I am now almost done writing a C++ client. As with writing the R client at the time, I have questions when applying the 'Bind' command. The server protocol contains the following sentence: "the two items xs:integer(123) and xs:string('ABC') are encoded as 123, \02, xs:integer, \01, ABC, \02, xs:string and \00" Does this mean that multiple items of different types can be bound to one (1) {name} variable? If so, in what situation could this be applied? Where can I find an example FLWOR query that uses this? Ben Engbers

1 0

Geo module removal on version 10 or above
by 13519004 Muhammad Bintang Pananjung 26 Apr '23

26 Apr '23

Hi all, Currently, i'm implementing spatial module on XML databases for my final project. i wonder why was geo module is removed on version 10 or above? i can't find any explanation about it in the documentation. thank you

3 2

skipping empty cells when parsing CSV
by Ron Van den Branden 26 Apr '23

26 Apr '23

Hi all, I'm investigating a way of analysing a massive set of > 900.000 CSV files, for which the CSV parsing in BaseX seems very useful, producing a db nicely filled with documents such as: <csv> <record> <ResourceID>00003a92-d10e-585e-84a7-29ad17c5799f</ResourceID> <source.id>bbcy:vev:6860</source.id> <card>AA</card> <order>0</order> <source_field/> <source_code/> <Annotation>some remarks</Annotation> <Annotation_Language>en</Annotation_Language> <Annotation_Type/> <resource_model/>  </record> <record> <ResourceID>00003a92-d10e-585e-84a7-29ad17c5799f</ResourceID> <source.id>bbcy:vev:6860</source.id> <card>BE</card> <order>0</order> <source_field/> <source_code>concept</source_code> <Annotation/> <Annotation_Language/> <Annotation_Type/> <resource_model/>  </record>  </csv> Yet, when querying those documents, I'm noticing how just selecting non-empty elements is very slow. For example: //source_code[normalize-space()] ...can take over 40 seconds. Since I don't have control over the source data, it would be really great if empty cells could be skipped when parsing CSV files. Of course this could be a trivial post-processing step via XSLT / XQuery, but that's unfeasible for that mass of data. Does BaseX provide a way of telling the CSV parser to skip empty cells? Best, Ron

2 5

Odd behaviour in the GUI (XPath with XQuery window)
by Zimmel, Daniel 19 Apr '23

19 Apr '23

Hi, somewhere between BaseX 9 and 10 there was a change in the behaviour of the Find/XQuery window (which I use quite a lot for quick access to data): * with 9.5, I can enter any valid XPath, and then delete it for a fresh start with another expression... * with 10.3, whenever I do the following: * place the cursor in the XQuery window * hit Strg-A to mark the line so I can start with a new query * enter a slash to my XPath, it jumps back to a random entry in the history, and does appends my slash to that entry. This does not make sense to me at all. Is this a feature or a bug? Am I using it wrong? I find it quite irritating, because it takes away the possibility to fire a quick XPath (as a valid XQuery expression) on the currently opened database without having to open a fresh query tab. Sorry if i am missing something obvious. Thanks, Daniel

2 2

Supported Saxon Version
by Johannes Bauer 17 Apr '23

17 Apr '23

Hi, what Saxon version is supported by BaseX10? I previously used Saxon 10 and updated to version 12. Since then my XSLT stylesheet does not work anymore. The same error happens with Saxon 11. If I execute the stylesheet with standalone Saxon 11 or 12 it is working fine. Best regards Johannes

2 3

Fwd: FW: java binding passing variables
by Burkhard Quessel 12 Apr '23

12 Apr '23

*Subject:* java binding passing variables I am trying to use xquery to transform Tibetan which is presented in Roman script to Unicode, i.e. into original Tibetan script. For this I use existing java code from here: https://github.com/buda-base/ewts-converter/blob/master/src/main/java/io/bd… I add the jar of this code ( https://jar-download.com/artifact-search/ewts-converter) to my basex library and import like this: import module namespace bdrc = "io.bdrc.ewtsconverter.EwtsConverter"; I can then use a java method to convert my Romanised Tibetan text to Unicode Original Tibetan script like so: let $roman := "bkra shis bde legs" return bdrc:toUnicode($roman) so far it works perfectly: བཀྲ་ཤིས་བདེ་ལེགས My problems begin when I try to add additional parameters to the conversion. The java documentation lists a number of possible parameters: *toUnicode(String str, List<String> warns, boolean sloppy, boolean lenient)* (I want the “warns” one) but I am just too stupid to figure out how exactly to include this in in my xquery code. Can anyone help out? Thanks Burkhard

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