QVT is a standard set of languages for model transformation

Model transformation

A model transformation, in model-driven engineering, is an automatable way of ensuring that a family of models is consistent, in a precise sense which the software engineer can define...

 defined by the Object Management Group

Object Management Group

Object Management Group is a consortium, originally aimed at setting standards for distributed object-oriented systems, and is now focused on modeling and model-based standards.- Overview :...

 .
Model transformation

Model transformation

A model transformation, in model-driven engineering, is an automatable way of ensuring that a family of models is consistent, in a precise sense which the software engineer can define...

 is a key technique used in model-driven architecture

Model-driven architecture

Model-driven architecture is a software design approach for the development of software systems. It provides a set of guidelines for the structuring of specifications, which are expressed as models. Model-driven architecture is a kind of domain engineering, and supports model-driven engineering of...

. As the name QVT indicates, the OMG standard covers transformations, views and queries together. Model queries and model views can be seen as special kinds of model transformation, provided that we use a suitably broad definition of model transformation: a model transformation is a program which operates on models.

The QVT standard defines three model transformation languages.