[OASIS Issue Tracker] Created: (TOSCA-42) Modeled entity instance requirements

Modeled entity instance requirements
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                 Key: TOSCA-42
                 URL: http://tools.oasis-open.org/issues/browse/TOSCA-42
             Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC
          Issue Type: Sub-task
          Components: Spec
            Reporter: Derek Palma


Modeled entity instance requirements. A model entity instance (Node/Relationship Template) may represent an entity which has a dependency on its own realization (i.e. the version of the deployment artifacts used to materialize it at deployment time)  and/or the existence of components with specific versions on which it depends. For example, SugarCRM may need to be deployed into a specific version of Apache web server along with version 5.3 of the PHP Runtime. Such dependency semantics are used by most modern language library managers (perl, ruby, ...) , package mangers (RPM, Deb, MSI, ...), and component containers (OSGI, PHP, process engines, ...).


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