|
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11.3.2. Conceptualization of Verbs
Verbs represent actions in the domain. The verbs dictionary expresses declaratively the meaning of each verb declaratively by identifying the following fields: Verb name; Attributes involved, used to refer to the set of attributes which act or suffer the verb action; Preconditions names, which include the list of names of conditions that constrain the action represented by the verb; Postcondition names, with the list of names of conditions that are true when the verb has already acted; Split verbs, used to enumerate and order the verbs in to which the current verb is split of; Rules name and Fomula are the names of the rules and formula used to carry out actions. Table 9 summarizes a verbs dictionary in the chemicals domain.
TABLE 4 |
Table of Instance Attribute: Atomic-Weight |
|
Instance attribute name |
Atomic-Weight |
|
Value type |
Mass quantity |
Unit of measure |
AMUa |
Precision |
|
Range of values |
(1, 257) |
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 |
|
a It is the weight of a proton. A gram-atom of an element is the weight of 1/Avogadro's Number of atoms of this element. |
|
TABLE 5 |
Table of Instance Attribute: Density-At-20-Celsius-Degrees |
|
Instance attribute name |
Density-At-20-Celsius-Degrees |
|
Value type |
Density quantity |
Unit of measure |
Gram/pot(Centimeter, 3) |
Precision |
|
Range of values |
(0, 25) |
Default value |
|
Cardinality |
1 |
Inferred from instance attribute |
Atomic-Weight and Atomic-Volume-At-20-Celsius-Degrees |
Inferred from class attributes |
Unknown |
Inferred from constants |
Unknown |
Formula |
DENSITY = ATOMIC-WEIGHT /ATOMIC-VOLUME-AT-20-CELSIUS-DEGREES |
To infer |
Unknown |
|
TABLE 6 |
Table of Class Attributes of the Concept Halogens |
|
Class attribute name |
Relation-attribute- name |
Logical relationship |
Value |
Unit of measure |
To infer |
References |
Minimum-Electron-Affinity- Of-Halogens |
Electron-Affinity |
> |
2.5 |
Electronvolt |
|
|
Maximum-Electron- Affinity-Of-Halogens |
Electron-Affinity |
< |
4 |
Electronvolt |
|
|
Minimum-Melting-Point- Of-Halogens |
Electron-Affinity |
[gte] |
219.62 |
Degree-Celsius |
|
|
Maximums-Melting-Point- Of-Halogens |
Electron-Affinity |
£ |
302 |
Degree-Celsius |
|
|
|
TABLE 7 |
Table of Constants in the Domain of Chemicals |
|
Constant name |
Description |
Value |
Unit of measure |
To Infer |
Standard-Temperature |
It is the temperature at which many processes are observed and many measures are taken. |
25 |
Celsius-Degree |
|
Standard-Pressure |
It is the pressure at which many processes are observed and many measures are taken. |
1 |
Atmosphere |
|
|
TABLE 8 |
Table of Instances: Chlorine |
|
Instance name |
Attributes |
Values |
Chlorine |
Atomic-Number. |
17 |
|
Atomic-Volume-At-20-Degrees-Celsius. |
Unknown |
|
Atomic-Weight. |
35.453 |
|
Boiling-Point. |
-34.6 |
|
Crystalline-Structure. |
|
|
Density-At-20-Degrees-Celsius. |
Unknown |
|
Electronegativity. |
3.0 |
|
Electron-Affinity. |
3.614 |
|
Electron-Structure. |
3s23p5 |
|
Group. |
VIIa |
|
Half-life. |
|
|
Hardness-Scale. |
|
|
Ionization-Energy. |
12.967 |
|
Melting-Point. |
-100.98 |
|
Oxidation-States. |
[1, 3, 5, 7] |
|
Period. |
3 |
|
Radioactivity-Constant. |
0 |
|
Resistivity-At-20-Degrees-Celsius. |
Unknown |
|
Resistivity-Temperature-Coefficient-per-Degree-Celsius. |
Unknown |
|
Semidisintegration-Period. |
|
|
Specific-Heat-At-Standard. |
Unknown |
|
Symbol. |
Cl |
|
Thermal-Conductivity-At-Standard-Temperature. |
Unknown |
|
List-Of-Salts |
["Common-salt, "Carnallite", "Sylvite"] |
|
FIGURE 12 Attributes classification tree in the domain of chemicals.
|