- web orientation
- researcher identity management
- authoring support
- object disclosure control
- data management support
- persistent storage
- full preservation archive, and
In addition, Researcher Identity should provide name control, that is, it knows who you are and will fill in a standardised version of your name in appropriate places. It should know your affiliation (institution, department/school, group, project and/or possibly work package). It might know some default tags for your work (eg Chris is normally talking about "digital curation"). However, this naming support must extend beyond your institution, so that collaborators and co-authors can be first-class users of other features. And it should relate to your (and their) standard institutional username and credentials; nothing extra to remember. This implies (I think) something like Shibboleth support.
This is getting kind of complicated, and verging towards another complex realm of Current Research[er] Information Systems (CRIS). These worthy systems also aim to make your life easier by knowing all about you, and linking your identity and work together. But they are complex, have their own major projects and standards, and have been going for years without much impact that I can see, except in a few cases. The RRS should take account of EuroCRIS and CERIF (see Wikipedia page) as far as they might apply.