True - it's only a substitute for the one line in Erik's code snippet:
$m/doc/node()[empty(self::b)]. You still need the document { <doc> .... } code
to build the full structure.
Damon
________________________________________
From: [email protected]
[[email protected]] On Behalf Of David Lee
[[email protected]]
Sent: Thursday, June 14, 2012 2:21 PM
To: MarkLogic Developer Discussion
Subject: Re: [MarkLogic Dev General] How to exclude some elements from
marklogic xquery output?
Unfortuantely that doesnt return the <doc> element ...
Its more tricky to exclude children but maintain the parent.
let $m :=
<doc>
<a>a</a>
<b>b</b>
</doc>
return $m/node() except $m/b
Simply returns
<a>a</a>
First, if you know how to do this in XSLT then ML 5.0+ supports XSLT so just
use that.
For pure XQuery its a bit more complex in the general case (arbitrary deep
elements). FunctX might come to your rescue:
http://www.xqueryfunctions.com/xq/functx_remove-elements.html
-----
import module namespace functx = "http://www.functx.com"; at
"/MarkLogic/functx/functx-1.0-nodoc-2007-01.xqy";
let $m :=
<doc>
<a>a</a>
<b>b</b>
</doc>
return functx:remove-elements($m,"b")
Result:
<doc>
<a>a</a>
</doc>
> -----Original Message-----
> From: [email protected] [mailto:general-
> [email protected]] On Behalf Of Damon Feldman
> Sent: Thursday, June 14, 2012 2:15 PM
> To: MarkLogic Developer Discussion
> Subject: Re: [MarkLogic Dev General] How to exclude some elements from
> marklogic xquery output?
>
>
> For anyone not familiar with self:: it is an XPath axis
> (http://www.w3schools.com/xpath/xpath_axes.asp). Another common idiom
> for this is to use the "except" keyword;
>
> let $m :=
> <doc>
> <a>a</a>
> <b>b</b>
> </doc>
> return $m/node() except $m/b
>
>
> Yours,
> Damon
>
> -----Original Message-----
> From: [email protected] [mailto:general-
> [email protected]] On Behalf Of Erik Hennum
> Sent: Thursday, June 14, 2012 10:49 AM
> To: MarkLogic Developer Discussion
> Subject: Re: [MarkLogic Dev General] How to exclude some elements from
> marklogic xquery output?
>
> Hi, Karthik:
>
> Basically, you need to construct a new version of the doc root element
> that doesn't have the b child element but has all other child nodes. If
> it is just a single exclusion, a simple predicate might be best:
>
> xquery version "1.0-ml";
> for $m in fn:doc()
> return document {
> <doc>{
> $m/doc/node()[empty(self::b)]
> }</doc>
> }
>
> If you need to exclude lots of stuff, you're probably better off with
> typeswitch:
>
> xquery version "1.0-ml";
> for $m in fn:doc()
> return document {
> <doc>{
> for $node in $m/doc/node()
> return typeswitch($node)
> case element(b) return ()
> default return $node
> }</doc>
> }
>
>
> Hoping that's useful,
>
>
> Erik Hennum
>
> ________________________________________
> From: [email protected] [general-
> [email protected]] On Behalf Of
> [email protected] [[email protected]]
> Sent: Thursday, June 14, 2012 7:25 AM
> To: [email protected]
> Subject: [MarkLogic Dev General] How to exclude some elements from
> marklogic xquery output?
>
> Hi,
>
> I want to exclude some elements from xquery output..
> For ex: if I have many documents with the following xml ,
> <doc>
> <a>a</a>
> <b>b</b>
> </doc>
>
> I want to return all the documents, but element <b> must be excluded in all
> these documents.
>
> for $m in fn:doc()
> return $m
>
> Above xquery will return all the documents as it is. Can someone please let me
> know how to exclude only element <b> before returning the document. Is
> there any xquery or marklogic function readily available to ignore some
> elements while returning the response? I know that we can easily achieve this
> using XSLT. But, is it possible using Xquery or marklogic function?
>
>
> Thanks and Regards,
> Karthik
>
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