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| XMI | |
|---|---|
| Filename extension | .xmi |
| Internet media type | |
| Type code | TEXT |
| Developed by | Object Management Group |
| Latest release | 2.5.1 June 2015; 10 years ago (2015-06) |
| Type of format | Markup language |
| Extended from | XML |
| Standard | MOF 2 XMI Mapping |
| Open format? | yes |
| Website | www |
TheXML Metadata Interchange (XMI) is anObject Management Group (OMG) standard for exchangingmetadata information viaExtensible Markup Language (XML).
It can be used for any metadata whose metamodel can be expressed inMeta-Object Facility (MOF), a platform-independent model (PIM).
The most common use of XMI is as an interchange format forUML models, although it can also be used for serialization of models of other languages (metamodels).
In theOMG vision of modeling, data is split into abstract models and concrete models. The abstract models represent the semantic information, whereas the concrete models represent visual diagrams. Abstract models are instances of arbitrary MOF-based modeling languages such asUML orSysML. For diagrams, the Diagram Interchange (DI, XMI[DI]) standard is used. There are currently several incompatibilities between different modeling tool vendor implementations of XMI, even between interchange of abstract model data. The usage of Diagram Interchange is almost nonexistent. This means exchanging files betweenUML modeling tools using XMI is rarely possible.
One purpose of XML Metadata Interchange (XMI) is to enable easy interchange of metadata between UML-based modeling tools and MOF-based metadata repositories in distributed heterogeneous environments. XMI is also commonly used as the medium by which models are passed from modeling tools to software generation tools as part ofmodel-driven engineering.
Examples of XMI, and lists of the XML tags that make up XMI-formatted files, are available in the version 2.5.1 specification document.[1]
XMI integrates 4 industry standards:
The integration of these 4 standards into XMI allows tool developers of distributed systems to share object models and other metadata.
Several versions of XMI have been created: 1.0, 1.1, 1.2, 2.0, 2.1, 2.1.1, 2.4, 2.4.1, 2.4.2. and 2 5.1. The 2.x versions are radically different from the 1.x series.
| Version | Release date | URL |
|---|---|---|
| 2.5.1 | June 2015 | http://www.omg.org/spec/XMI/2.5.1 |
| 2.4.2 | April 2014 | http://www.omg.org/spec/XMI/2.4.2 |
| 2.4.1 | August 2011 | http://www.omg.org/spec/XMI/2.4.1 |
| 2.4 | March 2011 | http://www.omg.org/spec/XMI/2.4 |
| 2.1.1 | December 2007 | http://www.omg.org/spec/XMI/2.1.1 |
| 2.1 | September 2005 | http://www.omg.org/spec/XMI/2.1 |
The Diagram Definition OMG project is another alternative for metadata interchange, which can also express the layout and graphical representation.[2]
XMI is an international standard:
