Type extensions to web services description language

A web service description language with object extensions provides type-centric extensions to web service description languages. The extensions illustrated herein provide the constructs to describe and implement a type-centric, object-model agnostic, web service description. By implementing the constructs described herein, a heterogeneous distributed computing environment can implement rich type-centric services. The type extensions allow many added features. For example, in a graph description, a type description indicates whether a type is encoded as a reference or embedded within another type. In another respect, in a service reference description, a type description indicates whether a type is remoted by value or by reference. In several other respects, a type description indicates that, a service extends another service, a service implements an interface (potentially multiple interfaces), a field of a type (including interfaces) is a reference type, a constant value field, or a bit field type that defines enumerations with associated values.