正确描述REST HTTP操作？

Question

阅读了大量定义GET / POST / PUT / DELETE各种解释的网站后，我感到有些困惑。经过深入阅读后，我相信我现在明白了，但如果有人能够证实我是否走在正确的轨道上会很有用。

以下解释了我对REST操作的理解：

GET    - get data
POST   - create or update **entire or part** resource at non-specific entity URI
PUT    - create or update **entire** resource at specific entity URI
DELETE - delete entity at specific entity URI

REST URI的一些示例：

/api/user
    POST   - create a new user and respond with unique user ID

/api/user/{id}
    GET    - get data for specific user
    POST   - update some or all user data
    PUT    - create or replace entire user
    DELETE - delete specific user

/api/user/{id}/profile
    GET    - get data for user profile
    POST   - update some or all user profile data
    PUT    - create or replace entire user profile

/api/users
    GET    - perform query to retrieve listing of user data

我是否沿着正确的路线走？有什么重要的我应该知道/阅读吗？