English definite article the indicates some specified individual of a given concept. An individual of a given concept is specified by mentioning it earlier in the sentence. Variables appear in semantic rules. When a variable occurs for the first time it is preceeded by a/an and later by the.

Different use cases of variables in semantic rules are summed up in the table below.

THE-" " is used to define an instance with a custom identifier, other that combination of words starting with capital letter and numbers separated by dashes.

Variable pattern Use case
a/the class-name  denotes variables assigned to a class/concept
a/the thing  represents an instance of the top concept "owl:Thing" and thus any variable in the SR-CE sentence.
a/the class-name(n)/thing(n)  different number in parenthesis marks more variables of the same type.


This example shows how to use definite article the while introducing variables into semantic rules.

Example: In the semantic rule below, there is one variable 'person'.
If a person is-year-old greater-or-equal-to 18 then the person is an adult-person.
Example: In the semantic rule below, there is one variable which could be anything.
If a thing is a person then the thing has-name (some string value).
Example: In the semantic rule below, there are two variables 'person'.
If a person(1) has-parent a person(2) and the person(2) is a female-person then the person(1) has-mother the person(2).
Example: Custom instance identifier.
THE-"K22 P2"