Attribute-oriented programming (@OP) is a technique for embedding metadata, namely attributes, within program code.

Attribute-oriented programming in various languages


With the inclusion of Metadata Facility for Java (JSR-175)[1] into the J2SE 5.0 release it is possible to utilize attribute-oriented programming right out of the box. XDoclet library makes it possible to use attribute-oriented programming approach in earlier versions of Java.


The C# language has supported attributes from its very first release. These attributes was used to give run-time information and are not used by a preprocessor. Currently with source generators, you can use attributes to drive generation of additional code at compile-time.


The Unified Modeling Language (UML) supports a kind of attribute called stereotypes.


The Hack programming language supports attributes. Attributes can be attached to various program entities, and information about those attributes can be retrieved at run-time via reflection.



  1. ^ "The Java Community Process(SM) Program - communityprocess - final".
This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (August 2009) (Learn how and when to remove this message)