[scim] Question on the use of attributes from schema extensions

[Keith Hazelton <[e-mail]>]

Prior to draft-ietf-scim-core-schema-10, this language was found in Section 3: “Except for the base object schema, the schema extension URI SHALL be used as a JSON container to distinguish attributes belonging to the extension namespace from base schema attributes.”

In later drafts, e.g. draft-ietf-scim-core-schema-22, the corresponding language is: "Unlike core attributes, extended attributes are kept in their own sub-attribute namespace identified by the schema extension URI."

Is it the intent of the current language that in the JSON representations of a resource it is permissible to interleave namespace-qualified attributes from schema extensions with attributes from the core schema? E.g., is something like this allowed:

{
  "schemas":
    [ "urn:ietf:params:scim:schemas:core:2.0:User",
      "urn:ietf:params:scim:schemas:extension:enterprise:2.0:User"],
  "id": "2819c223-7f76-453a-919d-413861904646",
  "externalId": "701984",
  "userName": "[e-mail]",
  "name": {
    "formatted": "Ms. Barbara J Jensen III",
    "familyName": "Jensen",
    "givenName": "Barbara",
    "middleName": "Jane",
    "honorificPrefix": "Ms.",
    "honorificSuffix": "III"
  },
  "displayName": "Babs Jensen",
  "nickName": "Babs",

  "enterprise:2.0:User:employeeNumber": "701984",
  "enterprise:2.0:User:costCenter": "4130",
  "enterprise:2.0:User:organization": "Universal Studios",
  "enterprise:2.0:User:division": "Theme Park",
  "enterprise:2.0:User:department": "Tour Operations",
  "enterprise:2.0:User:manager": {
      "value": "26118915-6090-4610-87e4-49d8ca9f808d",
      "$ref": "../Users/26118915-6090-4610-87e4-49d8ca9f808d",
      "displayName": "John Smith"
    }
...
}

Such a layout would make it easier to visually scan such a resource, thus encouraging the freer use of schema extensions where appropriate.

      Regards,  --Keith Hazelton
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