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TABLE 2
Data Dictionary in the Domain of Chemicals
 
Concept name Synon. Acron. Instances Class attributes Instance attributes
 
Alkali Group Ia AlK. Lithium. Group-Of-Alkali Metals List-Of-Bases
      Sodium. Low-Electronegativity-Of-
      Potassium. Alkali Metals
      Rubidium. Oxidation-States-Of-Alkali
      Cesium. Metals
      Francium. Minimum-Electron-Affinity-
        Of-Alkali Metals
        Maximum-Electron-Affinity-
        Of-Alkali Metals
Halogens VIIa Group Hlg. Fluorine. Group-Of-Halogens List-Of-Salts
  Halogenous   Chlorine. Minimum-Electron-Affinity-
      Bromine. Of-Halogens
      Iodine. Maximum-Of-Electron-
      Astatine. Affinity-Of-Halogens
        Minimum-Melting-Point-Of-
        Halogens
        Maximum-Melting-Point-Of
        -Halogens
Element   Elmts.     Atomic-Number.
          Atomic-Volume-At-20-
Degrees-Celsius.
          Atomic-Weight.
          Boiling-Point.
          Crystalline-Structure.
          Density-At-20-Degrees-
Celsius
          Electronegativity
          Electronic-Affinity
          Electronic-Structure
          Group
          Half-life
          Hardness-Scale
          Ionization-Energy
          Melting-Point
          Oxidation-States
          Period
          Radioactivity-Constant
          Resistivity-At-20-Degrees-
Celsius
          Semi-disintegration-Period
          Specific-Heat-At-
Standard-Temperature
          Symbol


TABLE 3
Table of Instance Attribute: Atomic-Volume-At- 20-Celsius-Degrees
 
Instance attribute name Atomic-Volume-At-20-Celsius-Degrees
 
Value type Volume quantity
Unit of measure pot(Centimeter, 3)/Gram-Atom
Precision --
Range of values (0, 100)
Default value --
Cardinality 1
Inferred from instance attribute Unknown
Inferred from class attribute Unknown
Inferred from Constants Unknown
Formula Unknown
To infer Density-at-20-degrees-Celsius

Attributes Classification Trees graphically show attributes and constants related in the inference sequence of the root attributes, as well as the sequence of formulas and rules to be executed to infer the root attributes. Using the fields Inferred from instance attributes, Inferred from class attributes, Inferred from constants, To infer and Formula defined in each table of instance attributes. The result will be several attributes classification trees. Figure 12 shows one of these trees and the formula that makes it possible.


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