title XDI $get Request handled by FacebookContributor participant "XDI Client" participant "XDI2 Server" participant "XDI2 FacebookContributor" participant "Facebook Graph API" note over "XDI2 Server","XDI2 FacebookContributor": FacebookContributor is enabled\nin the XDI2 Server configuration file XDI Client->XDI2 Server: XDI $get Request to retrieve user's personal data note right of "XDI2 Server": XDI2 Server decides to invoke\nthe FacebookContributor\nbased on the XDI Request XDI2 Server->XDI2 FacebookContributor: Request for Contribution to XDI Graph note right of "XDI2 FacebookContributor": FacebookContributor reads\nthe OAuth access token\nfrom the user's graph XDI2 FacebookContributor->Facebook Graph API: Retrieve User Data activate "Facebook Graph API" note right of "Facebook Graph API": OAuth access token\nis validated Facebook Graph API->XDI2 FacebookContributor: User Data deactivate "Facebook Graph API" XDI2 FacebookContributor->XDI2 Server: Contribution to XDI Graph note right of "XDI2 Server": Potential Caching of\nXDI Graph Contribution XDI2 Server->XDI Client: XDI Response