Defines semantic metadata for a property. This annotation allows attaching arbitrary key-value metadata to properties, which can be used for semantic processing such as proposition extraction, relationship mapping, and natural language generation.

Common semantic properties include:

• predicate: The natural language predicate for the relationship (e.g., "works at")

• inverse: The inverse predicate for bidirectional reasoning (e.g., "employs")

• aliases: Alternative phrasings that map to this relationship

Kotlin example:

data class Person(
    val name: String,

    @Semantics([
        With("predicate", "works at"),
        With("inverse", "employs"),
        With("aliases", "is employed by, works for")
    ])
    val worksAt: Company
)

Java example (class with field):

public class Person {
    private String name;

    @Semantics({
        @With(key = "predicate", value = "works at"),
        @With(key = "inverse", value = "employs"),
        @With(key = "aliases", value = "is employed by, works for")
    })
    private Company worksAt;
}

Java example (interface with getter):

public interface HasEmployment {
    @Semantics({
        @With(key = "predicate", value = "works at"),
        @With(key = "inverse", value = "employs")
    })
    Company getWorksAt();
}

The metadata is accessible via PropertyDefinition.metadata as a Map<String, String>.