OLAP Object Queries : Query Results : MV Scalar Fields

MV Scalar Fields
The following object query requests the MV scalar field Tags:
GET /Email/Message/_query?q=*&f=Tags&shards=2014-06-18
A typical result is shown below:
<results>
<docs>
<doc>
<field name="Tags">
<value>AfterHours</value>
</field>
<field name="_ID">+/pz/q4Jf8Rc2HK9Cg08TA==</field>
</doc>
<doc>
<field name="Tags">
<value>Customer</value>
<value>AfterHours</value>
</field>
<field name="_ID">+/wqUBY1WsGtb7zjpKYf7w==</field>
</doc>
<doc>
<field name="Tags"/>
<field name="_ID">+1ZQASSaJei0HoGz6GdINA==</field>
</doc>
</docs>
</results>
The same request in JSON is shown below:
{"results": {
"docs": [
{"doc": {
"Tags": ["AfterHours"],
"_ID": "+/pz/q4Jf8Rc2HK9Cg08TA=="
}},
{"doc": {
"Tags": ["Customer","AfterHours"],
"_ID": "+/wqUBY1WsGtb7zjpKYf7w=="
}},
{"doc": {
"Tags": [],
"_ID": "+1ZQASSaJei0HoGz6GdINA=="
}}
],
}}
As shown, all values of the Tags field are returned, and an element is included even when it is null, as it is for the third object.