_:vb16156 . _:vb16160 . "The superclass of properties that link a gr:QuantitativeValue or a gr:QualitativeValue to a second gr:QuantitativeValue or a gr:QualitativeValue that provides additional information on the original value. A good modeling practice is to define specializations of this property (e.g. foo:referenceTemperature) for your particular domain."@en . _:vb16161 _:vb16160 . _:vb16160 . _:vb16156 . _:vb16157 . _:vb16159 . _:vb16158 _:vb16157 . . _:vb16159 _:vb16161 . _:vb16158 . _:vb16161 . _:vb16157 . . _:vb16156 _:vb16158 . _:vb16159 . "value reference (0..*)"@en .