removing an element from xml using saxon xquery

问题

Hi I have an xml like this:

<ns1:books><ns2:book category="WEB"><ns3:title lang="en">Learning XML</ns3:title>
<ns3:author>Erik T. Ray</ns3:author><ns3:year>2003</ns3:year><ns3:price>39.95</price>

Using Saxon xquery I want to remove the ns3:author element, could anyone let me know how can I do it ?

I know there is a fn:remove(..) method but I don't want to use that as it takes an integer as a 2nd argument

Any complete code will be much appreciated

Also with saxon I am facing the error like

Caused by: net.sf.saxon.trans.StaticError: XQuery syntax error in #...nt-node() external; copy $temp#: Unexpected token "$" beyond end of query

and I used the xml

declare namespace soapenv="http://www.w3.org/2003/05/soap-envelope"; declare namespace reg="http://www.mycompany.com/internal/xsd/registrationservice"; declare namespace reg1="http://www.mycompany.com/internal/xsd/registrationtypes";

declare variable $RegistrationServiceRequest := <reg:RegistrationServiceRequest><reg1:RegistrationAttributes>       <reg1:Username>fdf</reg1:Username><reg1:Password>passwdfdford1</reg1:Password>      <reg1:Title>Mdfdfr</reg1:Title><reg1:FirstName>fdsfdsfsd</reg1:FirstName>
            </reg1:RegistrationAttributes><reg1:AutoLogin> <reg1:AutoLogin1>trtrtrt</reg1:AutoLogin1></reg1:AutoLogin>
        </reg:RegistrationServiceRequest>;
        copy $temp := $RegistrationServiceRequest 
modify delete node $temp/reg1:AutoLogin
return $temp

but when i tried with zorba it worked fine , the only problem is with the saxon and the error is at copy line

Any idea how to fix this ?

Thanks S

回答1:

If you want to make a small change to a document, XQuery is not your best choice. You can do it with XQuery update, or you can do it with XSLT. Doing it with XQuery alone is possible, but very cumbersome.

回答2:

You can use XQuery Update to do this:

copy $n := $data modify delete node $n/ns2:book/ns3:author return $n

You can try this example live at http://www.zorba-xquery.com/html/demo#JTJCK3mGQJgLav/2uOtgldoTYoM=

Or remove the element by using XQuery Scripting:

delete node $data/ns2:book/ns3:author; 
$data

You can try this example live at http://www.zorba-xquery.com/html/demo#QEuf9N5OLfD87WarBscHKrRrwm0=

来源：https://stackoverflow.com/questions/12009311/removing-an-element-from-xml-using-saxon-xquery

标签

xml

xquery

saxon