Thanks @dns_server. That will help me. Also I posted another question related to this and I got an answer. Seems like the query :
https://musicbrainz.org/ws/2/isrc/USRC11600201?inc=releases&fmt=json
is not returning the expected response and its due to some issue with Musicbrainz, When I do the same query with json I get the correct response in xml :
The response with the above query is in xml with the mbid of the album as well.