Re: [basex-talk] XLink and XPointer

Mon, 27 Apr 2015 07:19:01 -0700 

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"*>

<Link> (linking activities with requirements)
<*xi:include href=*”requirements-db.xml” x*pointer=”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 (link <http://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:*[email protected] [mailto:[email protected]] *Im Auftrag von *Jérôme Chauveau 
*Gesendet:* Montag, 27. April 2015 15:07
*An:* [email protected]
*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

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