|
|
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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.
|
)