Vue components extend basic HTML elements to encapsulate reusable code. All AOP implementations have some crosscutting expressions that encapsulate each concern in one place. For this purpose, IP defines packet structures that encapsulate the data to be delivered. Aspect-oriented programming aims to encapsulate cross-cutting concerns into aspects to retain modularity. Other metafiles contain extension fields, which encapsulate the original header. Layer-2 protocols encapsulate audio data in standard Ethernet packets. Sports bras can either encapsulate or compress breasts. Factory methods encapsulate the creation of objects. It also lets extension developers easily encapsulate code and avoid fragile hard dependencies. Story's "Commentaries" encapsulate and expound his ideology. Panels are used to break up and encapsulate sequences of events in a narrative. MPLS can encapsulate packets of various network protocols, hence the "multiprotocol" reference on its name. Both the RADIUS and Diameter AAA protocols can encapsulate EAP messages. Various techniques exist to encapsulate resource management. A "Compositor" class will encapsulate the algorithm used to format a composition.