Hi Chandni,
You have to define revCardinality ="Single" for direct access of this data in delivery. below is the code
<element externalJoin="true" label="Recipient" name="recipient" target="nms:recipient"
type="link" revCardinality ="Single">
<join xpath-dst="@text1" xpath-src="@brCode"/>
</element>
But, I think it might create a issue for you. You have defined brCode as primary key for you Br_data schema, by due this you are defining that each and every recipient will have different brCode, recipient can't share br Code. Adove code will define 1-1 cardinality between Recipient & BR_Data.
If multiple recipient can share same br code, than you need to define link with below code using unbound= "true", this might solve your problem
<element externalJoin="true" label="Recipient" name="recipient" target="nms:recipient"
type="link" revCardinality ="Single" unbound="true">
<join xpath-dst="@text1" xpath-src="@brCode"/>
</element>
Hope, it make sense.
Regards,
Ankur A.