XPath and XQuery

Hi all,
What's the difference between the XPath and XQuery, can XPath has better performance than XQuery?
Regards,
Jane

shree wrote:
1.Can you differentiate these XSLT, XPath and XQuery.XSL stands for EXtensible Stylesheet Language, and is a style sheet language for XML documents. XSLT stands for XSL Transformations.
XQuery is to XML what SQL is to database tables. XQuery was designed to query XML data.
XPath is used to navigate through elements and attributes in an XML document. XPath is a major element in W3C's XSLT standard - and XQuery and XPointer are both built on XPath expressions.
http://www.w3schools.com/xsl/default.asp
http://www.w3schools.com/xquery/default.asp
http://www.w3schools.com/xpath/default.asp
Cheers,
Vlad

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XSLT, XPath and XQuery

Hi,
1.Can you differentiate these XSLT, XPath and XQuery.
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shree wrote:
1.Can you differentiate these XSLT, XPath and XQuery.XSL stands for EXtensible Stylesheet Language, and is a style sheet language for XML documents. XSLT stands for XSL Transformations.
XQuery is to XML what SQL is to database tables. XQuery was designed to query XML data.
XPath is used to navigate through elements and attributes in an XML document. XPath is a major element in W3C's XSLT standard - and XQuery and XPointer are both built on XPath expressions.
http://www.w3schools.com/xsl/default.asp
http://www.w3schools.com/xquery/default.asp
http://www.w3schools.com/xpath/default.asp
Cheers,
Vlad

How to start learning XPATH and XQUERY

Hello
Please I am needing some guide to know if there is a guide that I could follow so that I can handle from the very beginning till the end an XML Document.
Besides I need to know if with JDeveloper I can edit and update an XML document (data type XMLTYPE column) inside of a table.
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Paola.
@}--->----->>----------

You could have a start here http://www.w3schools.com/. also the old XMLDB manuals 9.2, 10.1 had primers on handling xml (appendix section), another source for you could be the w3c organization: http://www.w3.org/.
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Message was edited by:
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Rohit,
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Regards
Patrizio

Could you send me the WSDLS?
My email address [email protected]

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Does the XMLP full or partially support the Xpath and XSLFO syntax?

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Hi Robin
OK, so hopefully you are not leading me into a trap here :o)
There are two parts to this question:
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How can i get oracle 10g and Xquery

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Xpath and Get XML Document Data

Good Morning,
I have just recently gotten involved in a project that requires communicating with some web services (axis2). We have existing scripts that handle this already, but they were built when we weren't on axis2 so now the XML output from the web service call is slightly different and i am no longer able to use the same xpath statement in the Get XML Document Data step.
I am receiving either null values or a prefix namespace error. I am new to xpath and have been reading as best i can from http://www.w3schools.com/xpath/ to try and understand how to write my statements to pull out the data i want correctly.
I have read that sometimes the editor has problems if the XML contains namespace declarations, etc.
Below is an example XML output where I'd like to be able to read the value in the ax211:success. My xpath gets prefix namespace errors as it doesn't recognize ax211.
Xpath: /descendant::ns:validateCertificationResponse/child::ns:return/child::ax211:success
Perhaps my xpath statement is just incorrect and wouldn't retrieve what i expect it to....
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Thanks,
Kevin

Hi,
well, it appears that text() is automatically appended to the XPath query for some reason in UCCX, this is why you actually see the text node within the ax211:success element. This //*[local-name()="success"] select the whole node, not its first child (which is actually the first element, which also happens to be a text).
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// - anywhere
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And within this "everything" you actually search with the condition within the angular brackets.
G.

Dynamic XPath in XQuery or XQSE

Is there a way to execute dynamic xpath expression in XQuery or XQSE, to do something like:
declare xqse function tns:checkName($addrBook as element(),$name as xs:String ) as xs:boolean {
declare $var as xs:String := "Address/Person[@name='" + $name +"']";
( : test if expression in $var returns not empty result when applied to $addrBook : )
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Thank You
Edited by [email protected] at 03/13/2008 7:19 PM
Edited by [email protected] at 03/13/2008 7:19 PM
Edited by [email protected] at 03/13/2008 7:20 PM

You haven't described why you want to do this - I suspect it is might be unnecessary/over-kill. Anyway
1) in the interest of efficiency, DSP compiles and optimizes xquery, and therefore the xquery cannot be modified at run-time.
2) the Filter api will let you apply filters, which effectively generate a new query, compile it and execute it. But you can only apply selections to elements that are exposed in the result
The thing is that final client should not use mediator api, and i do not want to have an intermediate client that would use mediator. I don't understand what you mean here - how is the client supposed to to submit a response to DSP and get a result if it does not call DSP directly or indirectly?
If the client already has the result, and you want to find something within that result, by far the most efficient way (aside from only returning that result in the xquery submitted to DSP), is to navigate through the DataObject with the get() methods. Firing up an xquery engine is a very expensive way to go through a DataObject - to do this you will need to serialize the DataObject into xml, create an XmlObject from that string, and then evaluate the xquery.

XPath and XQuery

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