Define enum items as URIs

[mjkoster]

Enum items should be URIs that enable description, protocol binding formats, and localization of terms. Make some examples and have a discussion.

[mjkoster]

Suggested design example:

      "odmData": {
        "DirectionData": {
          "odmEnum": {
            "Up": {
              "type": "number",
              "widthInBits": 8,
              "const": 0
            },
            "Down": {
              "type": "number",
              "widthInBits": 8,
              "const": 1
            }
          }
        }
      }