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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Component-oriented database</span></span>

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<p><b>Component-oriented database</b> (<b>CODB</b>) is a way of <a href="Data_administration" title="Data administration">data administration</a> and programming <a href="DBMS" class="mw-redirect" title="DBMS">DBMS</a>'s using the paradigm of the <a href="Component-oriented_programming" class="mw-redirect" title="Component-oriented programming">component-orientation</a>.

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<div class="mw-heading mw-heading2"><h2 id="Concepts">Concepts</h2></div>

<p>The paradigm of <i>component-orientation</i> (CO) is a development of the <a href="Object-oriented_software_engineering" class="mw-redirect" title="Object-oriented software engineering">object-orientation</a> (OO) in <a href="Mathematical_programming" class="mw-redirect" title="Mathematical programming">programming</a> and <a href="Data_modeling" title="Data modeling">data modeling</a>, leading toward the extreme the possibilities of reuse.<sup id="cite_ref-SERGIO_1-0" class="reference"><a href="#cite_note-SERGIO-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> In this model type, <a href="Class_(computer_programming)" title="Class (computer programming)">classes</a> are aggregate in cells called <i>components</i>, that execute a role similar to the <a href="Function_(computer_science)" class="mw-redirect" title="Function (computer science)">function</a> in the <a href="Structured_programming" title="Structured programming">structured programming</a>,<sup id="cite_ref-FROHL_2-0" class="reference"><a href="#cite_note-FROHL-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> a way of processing information contemporary to the <a href="Relational_database" title="Relational database">relational database</a> model.<sup id="cite_ref-SCRPTOL_3-0" class="reference"><a href="#cite_note-SCRPTOL-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>

</p><p>So the component-orientation mixes a set of features of its predecessor models. Understanding it is simpler while thinking of the <i>visual component</i>, that is an <a href="Application_software" title="Application software">application</a><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> which not being deployed into an <a href="Executable" title="Executable">executable</a> or <a href="Bytecode" title="Bytecode">bytecode</a> but otherwise turned to be linked by an icon inside another application, icon when one clicks on it implements certain tasks.<sup id="cite_ref-NETB_5-0" class="reference"><a href="#cite_note-NETB-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Then this concepts can be extended to <i>non-visual components</i>.<sup id="cite_ref-AUR_6-0" class="reference"><a href="#cite_note-AUR-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>

</p><p>In database activities, the component, visual or not, is an aggregate of <i>classes</i>, in the sense of <i>OO</i>, that can be linked to other ones by <i>adapters</i>.<sup id="cite_ref-TWIST_7-0" class="reference"><a href="#cite_note-TWIST-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>

</p><p>As after the OO model conception data and code programming code are mixed in a cohesive body,<sup id="cite_ref-DRDOB_8-0" class="reference"><a href="#cite_note-DRDOB-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> there are some difficulties in conceiving where the <i>CODB</i> and <i>CO</i> programming are separate one from the other. Although this enigma is important in conceptual epistemological area, in practical <a href="Data_processing" title="Data processing">data processing</a> there isn't so importance in this question because of usage of mapping models to large scale used software, like the mappings called <i><a href="ORDBMS" class="mw-redirect" title="ORDBMS">ORDBMS</a></i> and <i>CRDB</i> (component-relational database), in which the separation of data and code are still well defined.<sup id="cite_ref-DOCSORA_9-0" class="reference"><a href="#cite_note-DOCSORA-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Implementation">Implementation</h2></div>

<p>In <i>programming</i> activity, the CO is often taken place with large-scale used OO languages (like <a href="C%2B%2B" title="C++">C++</a>, <a href="Java_(programming_language)" title="Java (programming language)">Java</a>) with <i>mapping adaptation</i>. In <a href="Software_design" title="Software design">designing</a> the paradigm is supported by <a href="Unified_modeling_language" class="mw-redirect" title="Unified modeling language">UML</a>. In <i>data modeling</i>, <i>data administration</i> and <a href="Database_administration" title="Database administration">database administration</a>, the <i>mapping adaptation</i> is alike the <a href="ORDBMS" class="mw-redirect" title="ORDBMS">ORDBMS</a> paradigm. The adapted paradigm to component-based models is known as <i>component-relational database</i> (CRDB).<sup id="cite_ref-HAMEU_10-0" class="reference"><a href="#cite_note-HAMEU-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Advantages">Advantages</h2></div>

<p>The main advantage of the component-oriented thinking is the optimization of reusability of work. The CO paradigm allows the use of <i>ready to use</i> applications as modules to new and bigger projects.<sup id="cite_ref-NETB_5-1" class="reference"><a href="#cite_note-NETB-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>

</p><p>The notions of OO such as <a href="Encapsulation_(object-oriented_programming)" class="mw-redirect" title="Encapsulation (object-oriented programming)">encapsulation</a>, <a href="Inheritance_(computer_science)" class="mw-redirect" title="Inheritance (computer science)">inheritance</a> and <a href="Polymorphism_(computer_science)" title="Polymorphism (computer science)">polymorphism</a> do not necessarily lead to the idea of reusing applications as modules of new works. The CO thinking also assures that components are fully tested, as a real application, and thus there is in this model the paroxism of reuse,<sup id="cite_ref-ICTS_11-0" class="reference"><a href="#cite_note-ICTS-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> as well as the feature of understandability to end users, as corollary of the <i>app->comp</i> way of realizing the IT works.

</p><p>Even using the same software that are present in OO paradigm, there are many specific consequences in the world of data-oriented activities. In analogous way, whole models composed of classes can be treated as a part (component) of a new more comprehensive model.

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<div class="mw-heading mw-heading2"><h2 id="Bibliography">Bibliography</h2></div>

<ul><li>Buschmann, Frank; Meunier, Regine; Rohnert, Hans; Sommerlad, peter. Pattern-Oriented Software Architecture, Volume 1. John Wiley & Sons, 1996, <style data-mw-deduplicate="TemplateStyles:r1238218222">

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</style><a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>047195869-7</bdi>.</li>

<li>Cho, Eun-Sun; Han, Sang-Yong; Kim, Hyoung-Joo. A New Data Abstraction Layer Required For OODBMS, Proceedings of 1997 International Database engineering and Applications Symposium (IDEAS’97).</li>

<li>Clemente, Pedro J.; Hernandez, Juan. Aspect Component Based Software Engineering, Proceedings of the Second AOSD Workshop on Aspects, Components, and Patterns for Infrastructure Software (ACP4IS), March 2003.</li>

<li>Clements, Paul. From subroutines to subsystems: Component-Based Software Development. Brown, Allen. Component-Based Software Engineering: Selected Papers from Software Institute, 1996.</li>

<li>Erich Gamma, Erich; Helm, Richerd; Johnson, Ralph; Vilssides, John. Design Patterns. Elements of Reusable Object-Oriented Software. Addison-Wesley, 1995, <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0201633612</bdi>.</li>

<li>Garcia-Molina, Hector; Ulman, Jeffrey D.; Widom, Jennifer, Database Systems – A complete book. Prentice Hall, 2002, <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0131873253</bdi>.</li>

<li>Pfister, C.;Szyperski, C.. Why Objects Are Not Enough, Proceedings of Component Users Conference, Munich, Germany, 1996.</li>

<li>Rotaru, Octavian Paul;Dobre, Marian;Petrescu, Mircea. Integrity and Consistency Aspects in Component-Oriented Databases, Proceedings of the International Symposium on Innovation in Information.</li>

<li>Stroustrup, Bjarne. Why C++ is not just an Object-Oriented Programming Language, Addendum to OOPSLA95 Proceedings, ACM OOPS Messenger, October 1995.</li>

<li><cite id="CITEREFSzyperski,_Clemens1998" class="citation book cs1">Szyperski, Clemens (1998). <i>Component Software – Beyond Object-Oriented Programming</i>. ACM Press/Addison-Wesley. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0201178885</bdi>.</cite></li></ul>

<ul><li><a href="Object_Database" class="mw-redirect" title="Object Database">Object Database</a></li>

<li><a href="Relational_model" title="Relational model">Relational model</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text">or even a small application or <a href="Applet" title="Applet">applet</a></span>

</li>

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</style><div id="Database_models59" style="font-size:114%;margin:0 4em"><a href="Database_model" title="Database model">Database models</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Common models</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="Hierarchical_database_model" title="Hierarchical database model">Hierarchical</a></li>

<li><a href="Dimensional_modeling" title="Dimensional modeling">Dimensional</a></li>

<li><a href="Network_model" title="Network model">Network</a></li>

<li><a href="Relational_model" title="Relational model">Relational</a></li>

<li><a href="Entity%E2%80%93relationship_model" title="Entity–relationship model">Entity–relationship</a>

<ul><li><a href="Enhanced_entity%E2%80%93relationship_model" title="Enhanced entity–relationship model">Enhanced</a></li></ul></li>

<li><a href="Graph_database" title="Graph database">Graph</a></li>

<li><a href="Object_database" title="Object database">Object-oriented</a></li>

<li><a href="Entity%E2%80%93attribute%E2%80%93value_model" title="Entity–attribute–value model">Entity–attribute–value</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other models</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Online_analytical_processing#Multidimensional_databases" title="Online analytical processing">Multi-dimensional</a></li>

<li><a href="Array_DBMS" title="Array DBMS">Array</a></li>

<li><a href="Semantic_data_model" title="Semantic data model">Semantic</a></li>

<li><a href="Star_schema" title="Star schema">Star schema</a></li>

<li><a href="XML_database" title="XML database">XML database</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Implementations</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="Column-oriented_DBMS" class="mw-redirect" title="Column-oriented DBMS">Column-oriented</a></li>

<li><a href="Document-oriented_database" title="Document-oriented database">Document-oriented</a></li>

<li><a href="Object%E2%80%93relational_database" title="Object–relational database">Object–relational</a></li>

<li><a href="Deductive_database" title="Deductive database">Deductive</a></li>

<li><a href="Temporal_database" title="Temporal database">Temporal</a>

<ul><li><a href="Valid_time" title="Valid time">Valid time</a></li>

<li><a href="Transaction_time" title="Transaction time">Transaction time</a></li>

<li><a href="Decision_time" title="Decision time">Decision time</a></li></ul></li>

<li><a href="XML_database" title="XML database">XML data store</a></li>

<li><a href="Key%E2%80%93value_database" title="Key–value database">Key–value store</a></li>

<li><a href="Ordered_Key-Value_Store" class="mw-redirect" title="Ordered Key-Value Store">Ordered Key-Value Store</a></li>

<li><a href="Triplestore" title="Triplestore">Triplestore</a></li></ul>

</div></td></tr></tbody></table></div></div><div><div class="zim-footer">

This article is issued from <a class="external text" title="Last edited on 2025-01-03" href="https://en.wikipedia.org/wiki/?title=Component-oriented_database&oldid=1267048501">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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