What is the difference between Registry and Repository from SOA point of view?

• What is difference between Registry and Repositry from SOA point of view ?
• Which one should be used ? What are pros and cons of one over other and vice-versa ?
开发者_如何学C

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http://www.ibm.com/developerworks/wikis/display/woolf/Registry+vs.+Repository

"A registry is a list of items with pointers for where to find the items, like the index on a database table or the card catalog for a library. A repository stores the actual items, like a database table itself or a library's shelves of books. If you lose a registry, the items still exist; you just may need to reindex them. If you lose a repository, the items are gone."