Specs / standards more related to end user eportfolio interoperability:

- OpenID (API)

- Microformats (hResume, hCard, XFN...)

- Google OpenSocial (API based, REST)

- FOAF (RDF based)

- Atom / RSS

Specs  /standards more related to organisations ePortfolio interoperability (Business):

- Liberty Alliance (SAML2, ID-WSF2, ID-SIS, People Service)

- HR-XML (Candidate, Resume, Assessment), new proposal ID-SIS HR 

- IMS (eP, CP, LIP) mainly for packaging

- MPEG21 (DIDL) for packaging (alternative to IMS CP/eP)

Existing profiles:

- Europortfolio (Europass CV HR-XML profile, Europortfolio Content Package Application Profile)

- UK Leap (UK Leap 2)

- Kennisnet (Netherlands)

Related international specifications work:

- HR-XML (v3 of the specs)

- IMS (review of IMS ePortfolio specs)