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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 |
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Sodium. |
Low-Electronegativity-Of- |
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Potassium. |
Alkali Metals |
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Rubidium. |
Oxidation-States-Of-Alkali |
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Cesium. |
Metals |
|
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Francium. |
Minimum-Electron-Affinity- |
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Of-Alkali Metals |
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Maximum-Electron-Affinity- |
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|
|
Of-Alkali Metals |
Halogens |
VIIa Group |
Hlg. |
Fluorine. |
Group-Of-Halogens |
List-Of-Salts |
|
Halogenous |
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Chlorine. |
Minimum-Electron-Affinity- |
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Bromine. |
Of-Halogens |
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Iodine. |
Maximum-Of-Electron- |
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Astatine. |
Affinity-Of-Halogens |
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Minimum-Melting-Point-Of- |
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Halogens |
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Maximum-Melting-Point-Of |
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-Halogens |
Element |
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Elmts. |
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Atomic-Number. |
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Atomic-Volume-At-20- Degrees-Celsius. |
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Atomic-Weight. |
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Boiling-Point. |
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Crystalline-Structure. |
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Density-At-20-Degrees- Celsius |
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Electronegativity |
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Electronic-Affinity |
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Electronic-Structure |
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Group |
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Half-life |
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Hardness-Scale |
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Ionization-Energy |
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Melting-Point |
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Oxidation-States |
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Period |
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Radioactivity-Constant |
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Resistivity-At-20-Degrees- Celsius |
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Semi-disintegration-Period |
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Specific-Heat-At- Standard-Temperature |
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Symbol |
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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 |
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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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