MarkLogic REST API - JSON Response

Question

I'm using the MarkLogic 7 REST API to build an AngularJS application on top of an XML document database. My documents are in NEWSML-G2 format. I've configured custom query options to return only the title and the creation date for each document that matches the search string. The problem is this.

I have a title element in my XML.

<nitf version="-//IPTC//DTD NITF 3.6//EN" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:newzmeta="http://newz.nl/metadata/" xmlns="http://iptc.org/std/NITF/2006-10-18/">
<head>
<title newz:origin="Generated" xmlns:newz="http://newz.nl/">Test Article</title>
....
</nitf>

In my custom query options, I've used the following line.

<extract-metadata>
  <qname elem-ns="http://iptc.org/std/NITF/2006-10-18/" elem-name="title"/>
  ....
</extract-metadata>

Now, the problem is that when I hit the REST interface to make a query and ask for results in JSON format, I get the following in the response

"metadata":[{"{http://iptc.org/std/NITF/2006-10-18/}title":"Obama assumes the office of the President of the United States","metadata-type":"element"},{"  {http://iptc.org/std/nar/2006-10-01/}firstCreated":"2009-01-20T05:00:09","metadata-type":"element"}]

How do I retrieve the title value on the UI side? I get a syntax error if I ask for

 result.metadata.{http://iptc.org/std/NITF/2006-10-18/}title

Is there a way specifically to access this value, or to somehow change the name of the element that's returned from the MarkLogic side?

Dave Cassel · Accepted Answer · 2014-04-02 13:24:25Z

4

You can do this:

result.metadata.['{http://iptc.org/std/NITF/2006-10-18/}title']

The bracket notation is used to access properties whose names are not valid JavaScript identifiers, preventing you from using the dot notation.

answered Apr 2, 2014 at 13:24

Dave Cassel

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ehennum · Accepted Answer · 2014-04-02 16:07:06Z

1

For completeness, an alternative approach would be to write and install a transform for the search response that generates either metadata elements in the empty namespace or a JSON representation that's tuned to your requirements.

But, the simplest way is just to use the bracket notation as Dave suggests.

answered Apr 2, 2014 at 16:07

ehennum

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