[OASIS Issue Tracker] Commented: (TOSCA-152) WD02 - Extend Requirement grammar to support "Optional/Best Can" Capability Type matching

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    [ http://tools.oasis-open.org/issues/browse/TOSCA-152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=36798#action_36798 ] 

Matthew Rutkowski  commented on TOSCA-152:
------------------------------------------

Example in a3.8.4 appears as follows in WD01:

# Example of a requirement that is fulfilled by a feature (exported by a Node Type)
my_webapp_node_template:
  requirements:
    - database: tosca.capabilities.DatabaseEndpoint 

HOW DOES THIS LOOK if you require a Database with some feature (that is NOT a named type?

In other words, how do you do this with DECORATORS?!?!?  Without defining a brand new database type?  i.e. give me a database with these named features (not a new type).

Derek: indicated he may have an example in a past posted JIRA 



> WD02 - Extend Requirement grammar to support "Optional/Best Can" Capability Type matching 
> ------------------------------------------------------------------------------------------
>
>                 Key: TOSCA-152
>                 URL: http://tools.oasis-open.org/issues/browse/TOSCA-152
>             Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC
>          Issue Type: New Feature
>          Components: Profile-YAML
>    Affects Versions: CSD1
>            Reporter: Matthew Rutkowski 
>            Assignee: Derek Palma
>             Fix For: CSD1
>
>
> In order for loose coupling of requirements from one node to another using requirements on Capability Types, a semantic needs to be developed to allow importance of requirements to be described (i.e., mandatory, optional, best can etc.) and grammar updated.

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