OpenUP/OpenUP_SP/library/base_concepts/guidances/concepts/method_plugin.xmi

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  <mainDescription>&lt;p&gt;
    Method Plugin conceptually represents a unit for configuration, modularization, extension, packaging, and deployment of
    method content and processes.&amp;nbsp; A Process Engineer shall design&amp;nbsp;Plugins and allocate content to these Plugins
    with requirements for extensibility, modularity, reuse, and maintainability in mind.
&lt;/p&gt;
&lt;p&gt;
    Plug-ins can directly contribute new content, replace existing content, or to cross-reference to any Content Element or
    Process within another Plug-in that it extends.&amp;nbsp; Similar to UML 2.0's 'package merge' mechanism transformation
    interpretations, interpreting these Method Plug-in mechanisms results into new extended Method Content and
    Processes.&amp;nbsp; For example, a might contain additional steps for Tasks, new Work Products extensions to existing
    Roles to be responsible for the new Work Products, additional relationships of existing Content Elements to new
    specific Guidance elements (such as Guidelines, White Papers, Checklists), additional Activities for a Delivery
    Process, new Capability Patterns, etc.&amp;nbsp; A Method Plug-in defines these extension using Variability Element
    relationships and interpretation of these leads to new Method Content and Processes.
&lt;/p&gt;</mainDescription>
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