Re: [basex-talk] XLink and XPointer

Hi Jérôme,

i tried to load following xml document (linking-test.xml) in basex (with deactivated internal parser and activated xinclude option) as you mentioned: <Links xmlns:xi="http://www.w3.org/2001/XInclude"> <Link> <xi:include href="process-db.xml" xpointer="element(//*[@Id='sid-D453B3D6-0EA6-4607-A413-C6332ABE9F32'])"/> <xi:include href="requirements.xml" xpointer="element(//*[@Id='11cc0940-c8fb-4b81-920a-1ab5aea30037'])"/> </Link> </Links>

The answer form basex is: "basex/linking-test.xml" (Zeile 3): "include" mit href "process-db.xml" nicht erfolgreich, und es wurde kein "fallback"-Element gefunden. (I use the german version :); translated: "include" with href "process-db.xml" was not successful, and there is no "fallback"-Element found.)

It seems, there is no document with path "process-db.xml", but it is! If I try: db:path(doc("process-db")) it returns "process-db.xml"

Have you any idea, what's my mistake? Maybe the documents to link have to be stored in a different way?

Thanks and Regards Florian

Von: Jérôme Chauveau [mailto:jerome.chauveau@unicaen.fr] Gesendet: Montag, 27. April 2015 16:18 An: Eckey, Florian Cc: basex-talk@mailman.uni-konstanz.de Betreff: Re: AW: [basex-talk] XLink and XPointer

Florian,

When the XINCLUDE option is enabled, xpointers are automatically executed.

xpointer attribute has to be used on an <include/> element (href one is required to point on the xml document)

With this xml contents: in yourdb/linking.xml: <Links xmlns:xi="http://www.w3.org/2001/XInclude"http://www.w3.org/2001/XInclude> <Link> (linking activities with requirements) <xi:include href="requirements-db.xml" xpointer="element(/path/to/activity/with/activity-id-node)"/> * <xi:include href="bpmn-db.xml" xpointer="element(/path/to/requirement/with/requirement-id-node)"/> * </Link> </Links>

* Unfortunately, element scheme with node IDs is not well implemented (according to my tests) unless your documents are validating against a DTD (linkhttp://www.w3.org/TR/xptr-framework/#term-ddi).

When you'll execute this query (on the REST interface for example):

doc('yourdb/linking.xml')/links/link[1]

will returned: <Link> (linking activities with requirements) <Activity Id="activity-id"> ... </Activity> <Requirement Id="requirement-id"> ... </Requirement> </Link>

Hope this helps,

Jérôme.

Le 27/04/2015 15:35, Eckey, Florian a écrit : Hi Jérôme,

thanks for your input. Following situation: I have two documents in different xml databases (basex). On the one side a business process model document (bpmn 2.0) and on the other side a requirements specification document. These documents have to be consistent. One approach to handle consistency is linking specific elements of both documents with each other. In my approach, i need to link activities (xml nodes) and specific requirements (xml nodes) with each other. So the second approach seems to fit best. I understand the syntax of this approach, but one time I have to evaluate this xpointer expressions. Is the evaluation implemented anywhere? Or how can I do this?

Maybe I even don't need xinclude, but rather something like this (more similar to xlink; linking in an external document):

Business process document (xml database in basex): <Package> ... <Activity Id="activity-id"> ... </Activity> ... </Package>

Business process document (xml database in basex): <Requirements> ... <Requirement Id="requirement-id"> ... </Requirement> ... </Requirements >

Linking: <Links> <Link> (linking activities with requirements) <Locator href="requirements-db" xpointer="element(Activity[@Id=$activity-id])"/> (use xinclude here feels wrong) <Locator href="bpmn-db" xpointer="element(Requirement[@Id=$requirement-id])"/> </Link> </Links>

Is there something similar? Especially to execute xpointer? Or do I have to implement it on my own?

Thanks for your answers.

Regards.

Florian

Von: basex-talk-bounces@mailman.uni-konstanz.demailto:basex-talk-bounces@mailman.uni-konstanz.de [mailto:basex-talk-bounces@mailman.uni-konstanz.de] Im Auftrag von Jérôme Chauveau Gesendet: Montag, 27. April 2015 15:07 An: basex-talk@mailman.uni-konstanz.demailto:basex-talk@mailman.uni-konstanz.de Betreff: Re: [basex-talk] XLink and XPointer

Hi Florian,

The XINCLUDE Option is enabled in the default BaseX configuration. Which kind of xpointer link do you need?

Those 2 inclusion types seems to be well-implemented is the Java XInclude support (xinclude implementation used in BaseX):

1 - full document inclusion: <xi:include href='myDocument.xml'/> 2 - Fragment inclusion: <xi:include href='myDocument.xml' xpointer='element(/1/path/to/fragment' />

Hope this helps,

Regards.

Jérôme

Le 27/04/2015 13:29, Eckey, Florian a écrit : Hello,

i am actually writing my master thesis using basex for xml processing. I need to create consistency links between two xml documents, especially basex databases and its content. So I am certainly looking for xlink and xpointer implementations in basex. Are there any examples to do this with basex or if not, has anyone implemented an xquery version to execute it? I recoginzed that there are capabilities with xinclude. But I does not find any references of xinclude in basex, unless this: http://docs.basex.org/wiki/Options#XINCLUDE So has anyone ideas or experiences using xlink and especially xpointer with basex or xquery?

Regards, Florian

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Jérôme Chauveau - CERTIC-DSI - Campus I

Université de Caen Basse-Normandie

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Jérôme Chauveau - CERTIC-DSI - Campus I

Université de Caen Basse-Normandie