The person's name as it should be shown to other users.
A unique id for the person.
Excel always uses a UUID in the format {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}, but JSF makes
no strict requirement.
OptionalproviderSpecifies where the person's information came from. Excel supports the following values:
None: no specific provider; Person.userId is expected to be the person's name.AD: Active Directory; Person.userId will be Active Directory id.Windows Live: Microsoft account; Person.userId will be a 64-bit signed decimal.PeoplePicker: SharePoint People Picker; Person.userId will be an email address.OptionaluserOptional provider-issued user identifier that varies in format depending on the provider. See Person.providerId for details on possible values.
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