- From: Roger L. Costello <costello@mitre.org>
- Date: Mon, 07 Jul 2003 06:32:31 -0400
- To: www-rdf-interest@w3.org
- CC: tpassin@comcast.net, "Costello,Roger L." <costello@mitre.org>
Hi Folks, Here's the latest, incorporating the comments Tom made yesterday. Comments? /Roger ----------------------------------------------------------------- Conceptual Model: TangibleObject physicalProperty PhysicalProperty measurement Measurement measurementValue MeasurementValue precision source ... (any other measurement metadata) ----------------------------------------------------------------- Conceptual Model Applied to a TangibleObject which has a length: TangibleObject length Length measurement LengthMeasurement measurementValue LengthValue numericalValue unitSpecification precision source ... (any other measurement metadata) ----------------------------------------------------------------- Conceptual Model Property Hierarchies: physicalProperty | --------------------------------- | | lengthProperty areaProperty | | ------------------------- ------------- | | | | | | length width height thickness area size ----------------------------------------------------------------- Conceptual Model Class Hierarchies: PhysicalProperty Measurement MeasurementValue | | | ---------------- LengthMeasurement LengthValue | | Length Area ----------------------------------------------------------------- Concrete Example that Conforms to the Conceptual Model: <River rdf:ID="Yangtze"> <length> <Length> <measurement> <LengthMeasurement> <measurementValue> <LengthValue> <numericalValue>6300</numericalValue> <unitSpecification rdf:resource="#LengthInKilometers"/> </LengthValue> </measurementValue> <precision>...</precision> <source>...</source> </LengthMeasurement> </measurement> </Length> </length> </River> ----------------------------------------------------------------- Conceptual Model Statements: M1) A TangibleObject may have zero or more physicalProperties. M2) A physicalProperty is a kind of Property. M3) The type of the value of a physicalProperty is a PhysicalProperty. M4) A lengthProperty is a kind of physicalProperty. M4a) A areaProperty is a kind of physicalProperty. M5) A length is a kind of lengthProperty. M5a) A width is a kind of lengthProperty. M5b) A height is a kind of lengthProperty. M5c) A thickness is a kind of lengthProperty. M5d) A area is a kind of areaProperty. M5e) A size is a kind of areaProperty. M6) A PhysicalProperty may be characterized by zero or more measurement properties. M7) A Length is a kind of PhysicalProperty. M7a) A Area is a kind of PhysicalProperty. M8) The type of the value of a length is a Length. M8a) The type of the value of a width is a Length. M8b) The type of the value of a height is a Length. M8c) The type of the value of a thickness is a Length. M8d) The type of the value of a area is a Area. M8e) The type of the value of a size is a Area. M9) The type of the value of a measurement is a Measurement. M10) A LengthMeasurement is a kind of Measurement. M10a) The type of the value of a measurement property of a Length is a LengthMeasurement. M11) A LengthMeasurement is characterized by one or more equivalent (numerical value, units specification) pairs. Note - This refers to the values in different units, not to the results of different measurements taken at different times or by different methods. M12) A (numerical value, units specification) pair is a kind of MeasurementValue. M13) A MeasurementValue may be associated with metadata that include - a) Accuracy b) Precision c) Data set d) Calculations e) Algorithms used for the calculation. f) Relevant publications g) Source h) Reported precision (i.e., number of decimal places in the stated value, which may be different from the precision of the measurement) M14) There is at least one method for establishing the equivalence between each (numerical value, unit specification) pair of interest.
Received on Monday, 7 July 2003 06:34:27 UTC