EModelElement

protocol EModelElement : EObject

Overview

EModelElement extends EObject to add support for attaching annotations, making it the base for most metamodel elements including classes, attributes, references, packages, and more.

Annotations allow metadata to be attached to model elements without modifying the core metamodel structure, supporting use cases such as:

• Code generation directives

• Documentation strings

• Validation rules

• Tool-specific settings

Usage

struct MyClass: EModelElement {
    let id: EUUID
    let eClass: MyClassifier
    var eAnnotations: [EAnnotation] = []

    mutating func addDocumentation(_ text: String) {
        let annotation = EAnnotation(
            source: "http://www.eclipse.org/emf/2002/GenModel",
            details: ["documentation": text]
        )
        eAnnotations.append(annotation)
    }
}