What are the best practices to create a standard URI for a web service?

Following are important points to be considered while designing a URI:

• Use Plural Noun − Use plural noun to define resources. For example, we’ve used users to identify users as a resource.
• Avoid using spaces − Use underscore(_) or hyphen(-) when using a long resource name, for example, use authorized_users instead of authorized%20users.
• Use lowercase letters − Although URI is case-insensitive, it is good practice to keep url in lower case letters only.
• Maintain Backward Compatibility − As Web Service is a public service, a URI once made public should always be available. In case, URI gets updated, redirect the older URI to new URI using HTTP Status code, 300.
• Use HTTP Verb − Always use HTTP Verb like GET, PUT, and DELETE to do the operations on the resource. It is not good to use operations names in URI.