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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Java Metadata Interface</span></span>
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<p>Given that <a href="Metadata_(computing)" class="mw-redirect" title="Metadata (computing)">metadata</a> is a set of descriptive, structural and administrative <a href="Data" title="Data">data</a> about a group of <a href="Computer" title="Computer">computer</a> data (for example such as a <a href="Database_schema" title="Database schema">database schema</a>), <b>Java Metadata Interface</b> (or <b>JMI</b>) is a platform-neutral specification that defines the creation, storage, access, lookup and exchange of metadata in the <a href="Java_(programming_language)" title="Java (programming language)">Java programming language</a>.
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<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>
<p>The JMI specification was developed under the <a href="Java_Community_Process" title="Java Community Process">Java Community Process</a> and is defined by <a href="Java_Specification_Request" class="mw-redirect" title="Java Specification Request">JSR</a> 40 (a JSR is the formal document that describe proposed specifications and technologies for adding to the <a href="Java_platform" class="mw-redirect" title="Java platform">Java platform</a>).
</p><p>JMI is based on the <a href="Meta-Object_Facility" title="Meta-Object Facility">Meta-Object Facility</a> (or MOF) specification from the <a href="Object_Management_Group" title="Object Management Group">Object Management Group</a> (or OMG). The MOF is a <a href="Metamodeling" title="Metamodeling">metamodel</a> (a <a href="Computer_model" class="mw-redirect" title="Computer model">model</a> of any kind of metadata) used notably to define the <a href="Unified_Modeling_Language" title="Unified Modeling Language">Unified Modeling Language</a> (or UML).
</p><p>It supports the exchange of metadata through <a href="XML_Metadata_Interchange" title="XML Metadata Interchange">XMI</a>. XMI is a standard for exchanging metadata information via <a href="Extensible_Markup_Language" class="mw-redirect" title="Extensible Markup Language">Extensible Markup Language</a> (or XML). The MOF/XMI specifications are used for the exchange of UML models.
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<div class="mw-heading mw-heading2"><h2 id="Usage">Usage</h2></div>
<p>Essentially, JMI can be used to write tools in Java for manipulating UML models, which can be used in <a href="Model_Driven_Architecture" class="mw-redirect" title="Model Driven Architecture">Model Driven Architecture</a> and/or <a href="Model-driven_engineering" title="Model-driven engineering">Model Driven Development</a>. There are many implementations of JMI, including the Reference Implementation from <a href="Unisys" title="Unisys">Unisys</a>, <a href="SAP_NetWeaver" title="SAP NetWeaver">SAP NetWeaver</a> and <a href="Sun_Microsystems" title="Sun Microsystems">Sun Microsystems</a>'s open-source implementation from the <a href="NetBeans" title="NetBeans">NetBeans</a> group. JMI is compatible with <a href="Java_SE" class="mw-redirect" title="Java SE">Java SE</a> 1.3 and above through:
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<ul><li>Standardized mappings from the MOF modeling constructs to Java;</li>
<li>Reflective APIs for generic discovery and navigation of metadata models and instances.</li></ul>
<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>
<ul><li><a rel="nofollow" class="external text" href="http://www.jcp.org/en/jsr/detail?id=40">JSR 40</a></li></ul>
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This article is issued from <a class="external text" title="Last edited on 2023-05-15" href="https://en.wikipedia.org/wiki/?title=Java_Metadata_Interface&oldid=1154962921">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.
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