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<H1>relational structure</H1>
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(data structure)
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<strong>Definition:</strong>
The counterpart in formal logic of a data structure or class instance in the object-oriented sense. Examples are <a href="string.html" tppabs="http://hissa.nist.gov/dads/HTML/string.html"><em>strings</em></a>, <a href="directgraph.html" tppabs="http://hissa.nist.gov/dads/HTML/directgraph.html"><em>directed graphs</em></a>, and <a href="undirectgraf.html" tppabs="http://hissa.nist.gov/dads/HTML/undirectgraf.html"><em>undirected graphs</em></a>. Sets of relational structures generalize the notion of <a href="language.html" tppabs="http://hissa.nist.gov/dads/HTML/language.html"><em>languages</em></a> as <a href="set.html" tppabs="http://hissa.nist.gov/dads/HTML/set.html"><em>sets</em></a> of strings.
<P><em>Note:
From Algorithms and Theory of Computation Handbook, page 29-21, Copyright © 1999 by CRC Press LLC.</em>
<P>Author: <a href="terms.html#authorCRC-A" tppabs="http://hissa.nist.gov/dads/terms.html#authorCRC-A">CRC-A</a>
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Entry modified Thu Jun 17 09:56:40 1999.<BR>
HTML page formatted Wed Dec 22 09:36:21 1999.
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