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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Business object</span></span>
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</style><div role="note" class="hatnote navigation-not-searchable">"Business objects" redirects here. For the software company, see <a href="BusinessObjects" title="BusinessObjects">BusinessObjects</a>. For the concept in law, see <a href="Legal_person" title="Legal person">Business entity</a>.</div>
<p>A <b>business object</b> is an entity within a <a href="Multitier_architecture" title="Multitier architecture">multi-tiered</a> <a href="Software" title="Software">software</a> application that works in conjunction with the <a href="Data_access_layer" title="Data access layer">data access</a> and <a href="Business_logic" title="Business logic">business logic</a> layers to transport data.
</p><p>Business objects separate <a href="State_(computer_science)" title="State (computer science)">state</a> from <a href="Behavioral_pattern" title="Behavioral pattern">behaviour</a> because they are communicated across the tiers in a multi-tiered system, while the real work of the application is done in the business tier and does not move across the tiers.
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<div class="mw-heading mw-heading2"><h2 id="Function">Function</h2></div>
<p>Whereas a program may implement <a href="Class_(computer_science)" class="mw-redirect" title="Class (computer science)">classes</a>, which typically end in objects managing or executing behaviours, a business object usually does nothing itself but holds a set of <a href="Instance_variable" title="Instance variable">instance variables</a> or <a href="Property_(programming)" title="Property (programming)">properties</a>, also known as <a href="Attribute_(computing)" title="Attribute (computing)">attributes</a>, and <a href="Association_(object-oriented_programming)" title="Association (object-oriented programming)">associations</a> with other business objects, weaving a map of objects representing the business relationships.
</p><p>A <a href="Domain_model" title="Domain model">domain model</a> where business objects do not have behaviour is called an <a href="Anemic_domain_model" title="Anemic domain model">anemic domain model</a>.
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<div class="mw-heading mw-heading2"><h2 id="Examples">Examples</h2></div>
<p>For example, a "Manager" would be a business object where its attributes can be "Name", "Second name", "Age", "Area", "Country" and it could hold a <a href="One-to-many_(data_model)" title="One-to-many (data model)">1-n association</a> with its employees (a collection of "Employee" instances).
</p><p>Another example would be a concept like "Process" having "Identifier", "Name", "Start date", "End date" and "Kind" attributes and holding an association with the "Employee" (the responsible) that started it.
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<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Active_record_pattern" title="Active record pattern">Active record pattern</a>, design pattern that stores object data in memory in relational databases, with functions to insert, update, and delete records</li>
<li><a href="Business_intelligence" title="Business intelligence">Business intelligence</a>, a field within information technology that provides decision support and business-critical information based on data</li>
<li><a href="Data_access_object" title="Data access object">Data access object</a>, design pattern that provides an interface to a type of database or other persistent mechanism, and offers data operations to application calls without exposing database details</li>
<li><a href="Data_transfer_object" title="Data transfer object">Data transfer object</a>, design pattern where an object carries aggregated data between processes to reduce the number of calls</li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
<ul><li>Rockford Lhotka, Visual Basic 6.0 Business Objects, <style data-mw-deduplicate="TemplateStyles:r1238218222">
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</style><a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>1-86100-107-X</bdi></li>
<li>Rockford Lhotka, Expert C# Business Objects, <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>1-59059-344-8</bdi></li>
<li>Rockford Lhotka, Expert One-on-One Visual Basic .NET Business Objects, <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>1-59059-145-3</bdi></li></ul>
<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.martinfowler.com/eaaCatalog/domainModel.html">A definition of domain model</a> by <a href="Martin_Fowler_(software_engineer)" title="Martin Fowler (software engineer)">Martin Fowler</a></li>
<li><a rel="nofollow" class="external text" href="http://martinfowler.com/bliki/AnemicDomainModel.html">Anemic Domain Model</a> by Martin Fowler</li></ul>
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