string, URI, dateTime, text

At the conceptual level, the rdfs:Literal datatype fully represents the RADion datatypes of a string (an untyped literal) and text (string plus language tag). The RADion datatype of dateTime is also served since that requires a string conformant with ISO 8601:2004 which is true of all relevant xsd datatypes. Likewise a Literal datatyped as xsd:anyURI will fulfil the needs of RADion's URI data type.

string, URI, dateTime, text

At the conceptual level, the rdfs:Literal datatype fully represents the RADion datatypes of a string (an untyped literal) and text (string plus language tag). The RADion datatype of dateTime is also served since that requires a string conformant with ISO 8601:2004 which is true of all relevant xsd datatypes. Likewise a Literal datatyped as xsd:anyURI will fulfil the needs of RADion's URI data type.