|  | <!ELEMENT service-group (name,service+)> | 
|  | <!ATTLIST service-group> | 
|  | <!ELEMENT name (#PCDATA)> | 
|  | <!ATTLIST name replace-wildcards (yes|no) "no"> | 
|  | <!ELEMENT service (type,subtype*,domain-name?,host-name?,port,txt-record*)> | 
|  | <!ATTLIST service protocol (ipv4|ipv6|any) "any"> | 
|  | <!ELEMENT type (#PCDATA)> | 
|  | <!ATTLIST type> | 
|  | <!ELEMENT subtype (#PCDATA)> | 
|  | <!ATTLIST subtype> | 
|  | <!ELEMENT domain-name (#PCDATA)> | 
|  | <!ATTLIST domain-name> | 
|  | <!ELEMENT host-name (#PCDATA)> | 
|  | <!ATTLIST host-name> | 
|  | <!ELEMENT port (#PCDATA)> | 
|  | <!ATTLIST port> | 
|  | <!ELEMENT txt-record (#PCDATA)> | 
|  | <!ATTLIST txt-record> |