title: What is the 'scopes' field of the swagger security scheme object used for?
body: <pre><code>petstore_auth:
    type: oauth2
    authorizationUrl: http://swagger.io/api/oauth/dialog
    flow: implicit
    scopes:
      write:pets: modify pets in your account
      read:pets: read your pets
  </code></pre>
  <p>This is a securityDefinitions example from <a href="http://swagger.io/specification/#securitySchemeObject" rel="nofollow noreferrer">the Swagger Specification</a>. What does the <strong>write:pets</strong> and <strong>read:pets</strong> intended for? Is that some categories for the paths?</p>