Figure A2 3 Three schema approach
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<a href="//commons.wikimedia.org/wiki/File:A2_3_Three_schema_approach.jpg" class="image"><img alt="A2 3 Three schema approach.jpg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c6/A2_3_Three_schema_approach.jpg/100px-A2_3_Three_schema_approach.jpg" decoding="async" width="100" height="71" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c6/A2_3_Three_schema_approach.jpg/150px-A2_3_Three_schema_approach.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/c/c6/A2_3_Three_schema_approach.jpg/200px-A2_3_Three_schema_approach.jpg 2x" data-file-width="577" data-file-height="407"></a><br><a rel="nofollow" class="external text" href="http://www.itl.nist.gov/fipspubs/idef1x.doc">Integration Definition for Information Modeling (IDEFIX) -- 93 Dec 21</a>