How do you add a URI record to PowerDNS?

Question

I'm trying to add a URI record to my PowerDNS server and not having any luck. The PowerDNS-Admin web interface doesn't have "URI" in its drop-down list of record types and the pdnsutil command gives errors that make no sense to me.

The record I'm trying to add is:

_kerberos.example.com. 3600 IN URI 0 100 "krb5srv:m:tcp:freeipa.example.com."

I tried the pdnsutil command in several ways but still getting errors:

powerdns-master:~$ pdnsutil add-record example.com _kerberos URI 3600 0 100 krb5srv:m:tcp:freeipa.example.com.
Error: Parsing record content (try 'pdnsutil check-zone'): missing field at the end of record content '0'

powerdns-master:~$ pdnsutil add-record example.com _kerberos URI 3600 0 "100 krb5srv:m:tcp:freeipa.example.com."
Error: Parsing record content (try 'pdnsutil check-zone'): missing field at the end of record content '0'

powerdns-master:~$ pdnsutil add-record example.com _kerberos URI "0 100 krb5srv:m:tcp:freeipa.example.com."
Error: Parsing record content (try 'pdnsutil check-zone'): Data field in DNS should start with quote (") at position 6 of '0 100 krb5srv:m:tcp:freeipa.example.com.'

powerdns-master:~$ pdnsutil add-record example.com _kerberos URI 0 100 "krb5srv:m:tcp:freeipa.example.com."
Error: Parsing record content (try 'pdnsutil check-zone'): missing field at the end of record content '100'

powerdns-master:~$ pdnsutil add-record example.com _kerberos URI 3600 "0 100 krb5srv:m:tcp:freeipa.example.com."
Error: Parsing record content (try 'pdnsutil check-zone'): Data field in DNS should start with quote (") at position 6 of '0 100 krb5srv:m:tcp:freeipa.example.com.'

powerdns-master:~$ pdnsutil add-record example.com _kerberos URI 3600 0 100 "krb5srv:m:tcp:freeipa.example.com."
Error: Parsing record content (try 'pdnsutil check-zone'): missing field at the end of record content '0'

Any ideas on what I'm doing wrong?

Thanks in advance.