Chris Wallace's hack

XQuery

import module namespace jxml = "http://kitwallace.me/jxml"  at "../lib/jxml.xqm";
let $json := util:binary-to-string(util:binary-doc("/db/apps/wikibook/data/ckan2.json"))
let $flags := ()
return jxml:convert($json, $flags) 

Result

<div>
    <div>
        <maintainer>null</maintainer>
        <maintainer_email>null</maintainer_email>
        <id>f49f127f-612f-4eb3-9c35-241aeb6ed7d1</id>
        <metadata_created>2012-09-21T14:22:26.834887</metadata_created>
        <relationships/>
        <license>null</license>
        <metadata_modified>2013-01-31T01:00:42.708780</metadata_modified>
        <author>null</author>
        <author_email>debbie@article19.org</author_email>
        <download_url>http://www.aidstream.org/public/files/xml/art19-activities.xml</download_url>
        <state>active</state>
        <version>null</version>
        <license_id>null</license_id>
        <resources>
            <div>
                <mimetype>application/xml</mimetype>
                <resource_group_id>ce28a7a8-d84a-44bf-b920-a839ad2e74ef</resource_group_id>
                <hash>9ac523646e7bd4903da7b89950b0c71932c4fb8c</hash>
                <description/>
                <format>IATI-XML</format>
                <url>http://www.aidstream.org/public/files/xml/art19-activities.xml</url>
                <cache_url>null</cache_url>
                <webstore_url>null</webstore_url>
                <cache_last_updated>null</cache_last_updated>
                <package_id>f49f127f-612f-4eb3-9c35-241aeb6ed7d1</package_id>
                <mimetype_inner>null</mimetype_inner>
                <webstore_last_updated>null</webstore_last_updated>
                <last_modified>null</last_modified>
                <position>0</position>
                <size>11526</size>
                <id>877f13be-0010-4f96-83ab-95c64e62c2a9</id>
                <resource_type>null</resource_type>
                <name>null</name>
            </div>
        </resources>
        <tags/>
        <groups>
            <item>art19</item>
        </groups>
        <name>art19-activities</name>
        <isopen>false</isopen>
        <notes_rendered>
            <publisher_iati_id/>
            <activity_period-from/>
            <verified>no</verified>
            <publisher_organization_type>21</publisher_organization_type>
            <language>en</language>
            <activity_count>1</activity_count>
            <filetype>activity</filetype>
            <record_updated>2012-09-21</record_updated>
            <publisher_country>GB</publisher_country>
            <activity_period-to/>
            <data_updated>2012-09-21</data_updated>
            <publishertype>primary_source</publishertype>
        </notes_rendered>
        <url>null</url>
        <ckan_url>http://iatiregistry.org/dataset/art19-activities</ckan_url>
        <notes>null</notes>
        <title>Activity File art19-activities</title>
        <ratings_average>null</ratings_average>
        <extras>
            <publisher_iati_id/>
            <activity_period-from/>
            <verified>no</verified>
            <publisher_organization_type>21</publisher_organization_type>
            <language>en</language>
            <activity_count>1</activity_count>
            <filetype>activity</filetype>
            <record_updated>2012-09-21</record_updated>
            <publisher_country>GB</publisher_country>
            <activity_period-to/>
            <data_updated>2012-09-21</data_updated>
            <publishertype>primary_source</publishertype>
        </extras>
        <ratings_count>0</ratings_count>
        <revision_id>bed780d2-b83b-45a7-9149-3d1d5fc9f127</revision_id>
    </div>
</div>