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 <title>Contributes</title>
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 <h1 class="topictitle1">Contributes</h1>
 <div><p>A contributing element adds to the base element. Contributes provides a
 way for elements to contribute their properties into their base element without
 directly changing any of its existing properties, such as in an additive fashion.
 The effect, after contribution, is that the base element is logically replaced
 with an element that combines the attributes and associations of the contributing
 element with the base element.</p>
 <p>Use the Content Variability section on the Description tab to make an element
 contribute to another element. Select <strong>Contributes</strong> as the Variability
 type and then select the base element to which this element will contribute.
 The base element must be the same type of element as the contributing element.</p>
 <p>Any information you enter in the contributing element is added to the base
 element. Text fields in the contributing element are added at the end of the
 respective text fields in the base element.</p>
 <p>Contribution only adds attributes and associations to the base. It never
 overrides or replaces any information from the base. In other words, if the
 base is allowed an association to exactly one other element and has this one
 already defined, it is not being replaced by a contributor's association.</p>
 <div class="p"><strong>Contribution rules:</strong><ul><li>Attributes are appended except for identifying/naming attributes and non-string
 attributes such as boolean, date, etc.</li>
 <li>Outgoing to-one associations of the contributor are ignored if the base
 already has such an association or if the base element has more than one contributing
 element (i.e. it cannot be decided which contribution should be chose, then
 none will be chosen).</li>
 <li>Outgoing to-many associations are added to the base elements of a contribution.</li>
 <li>Incoming associations to the contributing element with a to-one constraint
 on the other association end are ignored if the base already has such an incoming
 association or if there is more than one contribution to consider for the
 base element.</li>
 <li>Other incoming associations to the contributing element are added to the
 base elements of a contribution.</li>
 <li>A base element of a contribution can have more than one contributor</li>
 <li>Contribution works transitively, i.e. a contribution element contributes
 its own contributors.</li>
 </ul>
 See <a href="variabilityassociations.html#variabilityassociations">Variability Associations</a> to find the associations for each element
 type.</div>
 </div>
 <div><div class="relconcepts"><strong>Related concepts</strong><br />
 <div><a href="variability.html#variability" title="Variability allows elements in one content package to influence or modify elements in other content packages without actually directly modifying the original content. Variability enables changes to the content while keeping the changes separate and optional.">Variability</a></div>
 <div><a href="extends.html#extends">Extends</a></div>
 <div><a href="replace.html#replaces">Replaces</a></div>
 </div>
 </div>
 </body>
 </html>
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	<title>Contributes</title>
	</head>
	<body id="contributes"><a name="contributes"><!-- --></a>

	<h1 class="topictitle1">Contributes</h1>
	<div><p>A contributing element adds to the base element. Contributes provides a
	way for elements to contribute their properties into their base element without
	directly changing any of its existing properties, such as in an additive fashion.
	The effect, after contribution, is that the base element is logically replaced
	with an element that combines the attributes and associations of the contributing
	element with the base element.</p>
	<p>Use the Content Variability section on the Description tab to make an element
	contribute to another element. Select <strong>Contributes</strong> as the Variability
	type and then select the base element to which this element will contribute.
	The base element must be the same type of element as the contributing element.</p>
	<p>Any information you enter in the contributing element is added to the base
	element. Text fields in the contributing element are added at the end of the
	respective text fields in the base element.</p>
	<p>Contribution only adds attributes and associations to the base. It never
	overrides or replaces any information from the base. In other words, if the
	base is allowed an association to exactly one other element and has this one
	already defined, it is not being replaced by a contributor's association.</p>
	<div class="p"><strong>Contribution rules:</strong><ul><li>Attributes are appended except for identifying/naming attributes and non-string
	attributes such as boolean, date, etc.</li>
	<li>Outgoing to-one associations of the contributor are ignored if the base
	already has such an association or if the base element has more than one contributing
	element (i.e. it cannot be decided which contribution should be chose, then
	none will be chosen).</li>
	<li>Outgoing to-many associations are added to the base elements of a contribution.</li>
	<li>Incoming associations to the contributing element with a to-one constraint
	on the other association end are ignored if the base already has such an incoming
	association or if there is more than one contribution to consider for the
	base element.</li>
	<li>Other incoming associations to the contributing element are added to the
	base elements of a contribution.</li>
	<li>A base element of a contribution can have more than one contributor</li>
	<li>Contribution works transitively, i.e. a contribution element contributes
	its own contributors.</li>
	</ul>
	See <a href="variabilityassociations.html#variabilityassociations">Variability Associations</a> to find the associations for each element
	type.</div>
	</div>
	<div><div class="relconcepts"><strong>Related concepts</strong><br />
	<div><a href="variability.html#variability" title="Variability allows elements in one content package to influence or modify elements in other content packages without actually directly modifying the original content. Variability enables changes to the content while keeping the changes separate and optional.">Variability</a></div>
	<div><a href="extends.html#extends">Extends</a></div>
	<div><a href="replace.html#replaces">Replaces</a></div>
	</div>
	</div>
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