tempfeed1.xml

beereader source code

			
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		<a id="viewpost1_TitleUrl" class="postTitle2" href="http://www.cnblogs.com/taowen/archive/2004/06/02/12828.aspx">Why does metamodeling recently get so much attention?</a>
	</div>
	<P>We can only speculate, but here are some commonly mentioned reasons:</P>
<UL>
<LI>
<P>Its time has come. </P>
<P>Metamodeling has been around at least since the late 1980s, but with the advent of the Internet and business integration, data integration is obviously a first-order priority. Metamodels are the foundation for data integration, even if they are not always called metamodels. </P>
<LI>
<P>The advent of metamodel-driven software packages. </P>
<P>The first metamodel-driven software packages were CASE tools (aka modeling tools) with an extensible, or fully configurable metamodel. In the latter case they are often called Meta-CASE tools. This allowed user organizations to customize software development methodologies, or industry standards, and their supporting modeling constructs. </P>
<P>Now metamodel-driven software is under the hood in many places, such as e-business integration suites. </P>
<LI>
<P>The increasing availability of metamodel-driven technologies and standards. </P>
<P>The most famous example in this respect may be the Unified Modeling Language (UML), which is (mostly) defined in terms of a metamodel. The UML was not the first, however: previous efforts included CDIF (CASE tool interoperability based on an Integrated Meta-model), PCTE and IRDS (both repository standards), STEP (industrial information exchange) and others. </P>