QVT Declarative is an implementation of the Core (QVTc) and Relations (QVTr) Languages defined by the OMG Query/View/Transformation Specification (QVT).

(The QVT Operational component provides an implementation of the QVTo Language.)

The QVT Declarative component provides the following capabilities to support the QVT Declarative Languages:

• Defines a semantically sensitive editors for QVTc and QVTr.
• Defines an Ecore implementation of the QVT abstract syntax model, including support for serialization of QVT documents.
• Defines an EMOF implementation of the QVT, Essential OCL and Essential MOF abstract syntax models, including support for serialization of QVT documents.

The QVTc and QVTr parsers are generated by the LALR Parser Generator, a SourceForge project, licensed under the EPL v1.0. Download it from the LPG home page. This site includes the generator executable required to regenerate the parser code.