BaseX-Talk September 2022

basex-talk@mailman.uni-konstanz.de

14 participants
14 discussions

Copy Modify Return - base URI preserved?
by Hans-Juergen Rennau 07 Sep '22

07 Sep '22

Dear BaseX people, I just observed that a document obtained by applying Copy/Modify/Return to a source document preserves its base URI, that is, base-uri($resultDoc) = base-uri($sourceDoc). That is marvellous, but can I rely on this as a feature? (In comparison - if I obtained the result document in a "conventional" way by recursive processing of the source document, the base URI would be lost, unless I added an @xml:base.) Kind regards,Hans-Jürgen

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Basex query for checking size of node
by Sarath Surisetty 02 Sep '22

02 Sep '22

Problem statement: one of the project stores the logs in BaseX, and size of the baseX increases nearly 1gb to 10gb . when the size of BaseX increases, while performing queries to baseX, noticed that the CPU utilization exceeded more than 200% and performance is degraded drastically, But when some of logs data removed from BaseX manually BaseX performance is good. could u help in , 1)We are getting issues from customers env , where we don't have access to analyze which node is consuming more storage or which query is consuming more cpu and customer are not supposed to use basex gui. Could you give the query(Xquery) to print list of nodes(xmls) and its sizes ? 2)could you share any suggestions to resolve the performance issues. thanks sarath Regards Sarath

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Am I using proc:exec wrong?
by Graydon Saunders 02 Sep '22

02 Sep '22

Hello -- This is with BaseX 10.1 on a linux box: 18:02 graydon % java -version openjdk version "17.0.4" 2022-07-19 OpenJDK Runtime Environment (Red_Hat-17.0.4.0.8-1.fc36) (build 17.0.4+8) OpenJDK 64-Bit Server VM (Red_Hat-17.0.4.0.8-1.fc36) (build 17.0.4+8, mixed mode, sharing) I'm trying to invoke CoffeePot, https://coffeepot.nineml.org/ which is an ixml processor. In the BaseX GUI, proc:execute('/usr/bin/java','-version') gives me the expected version information as an error, despite a return code of zero: <result><error>openjdk version "17.0.4" 2022-07-19 OpenJDK Runtime Environment (Red_Hat-17.0.4.0.8-1.fc36) (build 17.0.4+8) OpenJDK 64-Bit Server VM (Red_Hat-17.0.4.0.8-1.fc36) (build 17.0.4+8, mixed mode, sharing) </error><code>0</code></result> >From a console, /usr/bin/java -cp /home/graydon/bin/coffeepot-package/coffeepot-1.99.8/coffeepot-1.99.8.jar org.nineml.coffeepot.Main works fine, in as much as I get the list of coffeepot usage information I expect if it's run without arguments. proc:execute('/usr/bin/java','-cp /home/graydon/bin/coffeepot-package/coffeepot-1.99.8/coffeepot-1.99.8.jar org.nineml.coffeepot.Main') returns <result><error>Unrecognized option: -cp /home/graydon/bin/coffeepot-package/coffeepot-1.99.8/coffeepot-1.99.8.jar org.nineml.coffeepot.Main Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. </error><code>1</code></result> I suspect I'm doing something wrong, but it's not at all clear to me what. Anyone have suggestions? Thanks! Graydon

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Problem with validate:xsd-report
by Hans-Juergen Rennau 01 Sep '22

01 Sep '22

Dear BaseX people, I encounter a problem with validate:xsd-report(), more particular with using a schema importing the well-known xml.xsd. The imported attribute declaration (xml:base) is not found. I am pretty sure that it is my fault, but I just can't find my error - could you take a look? (1) Document: doc.xml <book xml:base="/a/b/c" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="schema.xsd"> <author>xyz</author></book> (2) Schema: schema.xsd <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"> <xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="xml.xsd"/> <xs:element name="book"> <xs:complexType> <xs:sequence> <xs:element name="author" type="xs:string"/> </xs:sequence> <xs:attribute ref="xml:base"/> </xs:complexType> </xs:element></xs:schema> (In the same folder, a downloaded copy of xml.xsd is stored - for a snippet, see PS) (3) Query: validate.xq let $doc := 'doc.xml'let $xsd := 'schema.xsd'return validate:xsd-report($doc, $xsd) (4) Result: basex validate.xq=><report> <status>invalid</status> <message level="Fatal" line="9" column="43" url="file:/C:/projects/d2type/jats/test-validation/schema.xsd">src-resolve: Cannot resolve the name 'xml:base' to a(n) 'attribute declaration' component. </message></report> I do not understand why the import seems to be ignored. Validating with oXygen works fine, but I suppose that oXygen ignores the @schemaLocation. If you see the reason, please let me know. Cheers,Hans-Jürgen PS: Snippet from xml.xsd, stored in the same folder: <?xml version='1.0'?><!DOCTYPE xs:schema PUBLIC "-//W3C//DTD XMLSCHEMA 200102//EN" "XMLSchema.dtd" ><xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:xs="http://www.w3.org/2001/XMLSchema" xml:lang="en"> ... <xs:attribute name="base" type="xs:anyURI"> <xs:annotation> <xs:documentation>See http://www.w3.org/TR/xmlbase/ for information about this attribute.</xs:documentation> </xs:annotation> </xs:attribute> ...</xs:schema>

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BaseX-Talk September 2022