| http://www.w3.org/ns/prov#value | - If they are storage-equivalent to something, that would be binary(4) and binary(8) respectively.Furthermore, I do not appreciate casts to variable length data without specifying the max length, even though it in your cases implicitly means varchar(30).Casting to varbinary does not convert it to hex, hex is a representation which may be used for displaying the data to the client.
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