URI (Uniform Resource Identifier)
A Uri Record is a DNS record used to represent raw actions.
A URI consists of a prefix and its contents. The record is a means for publishing mappings from hostnames to URIs.
A URI record looks like the below:
_ftp._tcp.yourdomain.com. 90 IN URI 10 1 "ftp://ftp.yourdomain.com/home"
tcp: protocol which is the transport protocol of the desired service. It is usually TCP or UDP.
yourdomain.com: name. the domain name for which this record is for.
10: priority which is the priority of the target host. The lower the value, the higher the priority.
1: weight which is used for records with the same priority. Higher value means more preferred.
"ftp://ftp.yourdomain.com/home": target which holds the URI of the target enclosed in double-quote.