On symbol ordering (was: [xdi] Exciting development: XDI graph model documented - please indicate your syntax preferences!)

Attribute symbol: &
Singleton symbol: |
Literal symbol: #

Order: ( "="/"@"/"+"/"$"/"!"/"*" ) [ "|" ] [ "&" ]

=markus+|&email/$ref/
   =markus+&email!9876
=markus+home+|&email/$ref/
   =markus+&email!5432
=markus+work+|&email/$ref/
   =markus+&email!9876
=markus+&email!5432#/#/
   ""
=markus+&email!9876#/#/
   ""
=markus+address!4567+&street[1]#/#/
   "123 Main St"
=markus+address!4567+&street[2]#/#/
   "Apt 23"
=markus+address!4567+|&city#/#/
   "Vienna"
=markus+address!4567+|&country#/#/
   "Austria"
=markus+address!4567$|&t#/#/
   "2013-04-11T10:11:12Z"