External web service provided by third party application

Hi all,
Hope to clarify some doubts on usage of Enterprise Service Repository. I understand that ESR is the storage of service interfaces that may be provided or consume by different systems in the landscape.
If a business process is required to consume an external web service that is provided by a third party application on some web server, does the ESR stores the definition of the web service and provides it to the business process?
Is ESR only a repository for service interfaces that would be implemented by the internal systems?
Regards

I was looking to confirm my understanding about defining external webservices in Enterprise Repository few weeks back. Though i did not get proper confirmation any one yet on this forum, here is my understanding,
1. One can define the service interface for the third party webservice in Enterprise Service Repository for the purposes of keeping track of available services in the organization and also to provide some documentation about it for other developers looking to reuse it.
2. One can also import the WSDL as external definition in to Enterprise Service Repository.
3. We may not be able to generate proxies for these third party provided applications
Arul

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