http - Describing RESTful URLs -

here's example url:

/users/123/comments 

based on url, term best describe users? users resource or part of resource. name of part?

the same question goes other parts. terms best describe 123 , comments?

is there term refer second part of restful urls? describe 123 in /users/123 , purchases in /me/purchases.

rest resource-oriented. urls represent resources.

in example, /users/123/comments:

• users resource.
• 123 unique identifier of user.
• in case, comments sub-resource of users, resources on own (ex. calling /comments/{id})

about second question, format /me/purchases not same /users/123. , /me/purchases short url /users/{myid}/purchases purchases sub-resource of users (and resource on own also, available /purchases/{id}).

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for more information, here video, not directly related question, made , interesting rest web services.