The Model Development Tools (MDT) project focuses on big "M" modeling within the Modeling project. Its purpose is twofold:
The next release of MDT is tentatively scheduled for the end of June 2010 (see Helios New & Noteworthy). For the previous release, see Galileo New & Noteworthy.
The XML Schema Definition is a reference library that provides an API for use with any code that examines, creates or modifies W3C XML Schema (standalone or as part of other artifacts, such as XForms or WSDL documents).
XSD is a library that provides an API for manipulating the components of an XML Schema as described by the W3C XML Schema specifications, as well as an API for manipulating the DOM-accessible representation of XML Schema as a series of XML documents, and for keeping these representations in agreement as schemas are modified.
The library will include services to serialize and deserialize XML Schema documents, and to do integrity checking of schemas (for example, not using a maximum value for a simpleType which is invalid considering the base type of that simpleType). The project goal is to support 100% of the functionality of XML schema representation, but not necessarily to provide document against schema assessment or validation services, which are normally provided by a validating parser, such as Apache's Xerces-J.

BPMN2 is an open source component of the Model Development Tools (MDT) subproject to provide a metamodel implementation based on the forthcoming Business Process Model and Notation (BPMN) 2.0 OMG specification.
IMM is an open source component of the Model Development Tools (MDT) subproject to provide metamodel/profile implementations based on the forthcoming Information Management Metamodel (IMM) OMG specification.
MST is an open source sub-project of the Model Development Tools (MDT) project to provide tooling for the development of MOFTM-compliant metamodels and specifications based on them.
OCL is an implementation of the Object Constraint Language (OCL) OMG standard for EMF-based models.
Papyrus is an open source component of the Model Development Tools (MDT) subproject to provide an integrated, user-consumable environment for editing models based on UML and other related languages such as SysML.
SBVR provides a metamodel implementation and sample tools based on the adopted Semantics of Business Vocabulary and Business Rules (SBVR) OMG specification.
UML2 is an EMF-based implementation of the UMLTM 2.x metamodel for the Eclipse platform.
Oct 8th, 2008 - The EODM component has been terminated; see the Termination Review slides for details.
Oct 8th, 2008 - The OCL Tools component has been terminated; see the Termination Review slides for details.
Oct 1st, 2008 - Check out what's new in the Galileo M2 milestone of the OCL subcompoject.
May 13th, 2008 - A new Papyrus component has been proposed.
Build NewsFeb 1st - XSD stable build 2.6.0M5 is available for download.
Jan 10th - XSD integration build I201001101746 is available for download.
Dec 12th 2009 - XSD stable build 2.6.0M4 is available for download.
Nov 26th 2009 - XSD R2_4_maintenance build M200911261908 is available for download.
Want to contribute models, projects, files, ideas, utilities, or code to MDT or any other part of the Modeling Project? Now you can!
Have a look, post your comments, submit a link, or just read what others have written. Details here.