(some boolean/datetime/integer/string value)

These keywords refer to a data property of a specified type (see table).

Keywords Meaning
(some value)  equivalent to rdfs:Literal. This can take any data type but without knowing what type this data is.
(some integer value)  equivalent to xsd:int.
(some real value)  equivalent to xsd:double.
(some boolean value)  equivalent to xsd:boolean.
(some string value)  equivalent to xsd:string.
(some datetime value)  equivalent to xsd:datetime.

Examples

The example shows how to specify data type of a data property.

Example: We specify the data type of name to be string and the data type of age to be integer.
Every person has-name nothing-but (some string value).
Every person has-age nothing-but (some integer value).