annotation type

Hi all,  Looking at the inline markup I noticed that we have currently the following for the type attribute for <mrk>:  - generic - term - comment - x-<userDefinedType>  Wouldn't it make sense to use the same pattern as the code type for the user-defined values, namely:
<prefix>:<value>  Where: The prefix is a string uniquely identifying a collection of values for a specific authority. The value is any string value defined by an authority.  ?  Cheers, -yves