Format of the HL-7 database: 0. General Columns are colon separated Rows are separated by 1. Simple Relation <headline, describing attributes> <row 1> ... <row n> <EOF> 2. Collection of Relations of a common type <title> <headline, describing relation idents> -<headline, describing attibutes> <relation 1 ident> -<relation 1, row 1> -... -<relation 1, row n> ... <relation m ident> -<relation m, row 1> -... -<relation m, row n>