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Requirement

Title

Service functionality

Identifier

SWIM-SERV-012

Requirement

A service description shall describe the functionality of the service as a list of functions and their associated real world effects.

Rationale

The functions provide business and operational experts with a business view of the interactions with the service, without having to look at the interface details.

Verification

Completeness: Verify that the elements are included.

Consistency: Verify that the functions and real world effects are consistent with the operational needs.

Correctness: Not Applicable.

Examples/Notes

Note: A function is a type of activity describing the functionality of a service. Every function usually (but not always) can be mapped to service operations defined as a part of the service’s interface; i.e., functions provide a “business view” and service operations provide a “technical view” of a particular service activity.

Note: A real world effect is an ultimate purpose associated with the interaction with the service. It may be the response to a request for information or the change in the state of some entities shared between the participants in the interaction.

Example functions and real world effects:

function

real world effect

Retrieve a list of flights

(Network Information sharing)

Retrieve information of a single flight

(Network Information sharing)

Provide Departure Planning Information (DPI)

NM systems updated with the information; NM systems publish the resulting flight update

Level of Implementation

Mandatory


Guidance

Examples

See the Service Functionality section within the Donlon TOBT Setting Service Description.

Guidance for JSON service description 

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Schema

The guidance concerns JSON Schema v0.0.3 (see Schema releases).

		"ServiceGeneralDescription" : 
		{
			"description" : "Description of the service in terms of what it provides, the purpose and under which conditions and quality levels the service is provided.",
			"type": "object",
			"additionalProperties": false,
			"required": ["operationalNeed", "functionality", "qualityOfService", "accessAndUseCondition", "validation"],
			"properties":
			{

 				"functionality":
				{
					"description" : "A type of activity describing the functionality of a service. [SWIM-SERV-012]",
					"type" : "array",
					"items" : { "$ref":"#/definitions/Functionality" },
					"minItems": 1
				},

			}
		},


		"Functionality" : 
		{
			"description" : "A type of activity describing the functionality of a service.",
			"type": "object",
			"additionalProperties": false,
			"required": ["name", "description", "realWorldEffect"],
			"properties":
			{
				"name":
				{
					"description" : "The name of the service function.",
					"type" : "string",
					"minLength":1
				},
				"description":
				{
					"description" : "Description of the service function. [SWIM-SERV-012]",
					"type" : "string",
					"minLength":1
				},
				"realWorldEffect":
				{
					"description" : "An ultimate purpose associated with the interaction with the service. It may be the response to a request for information or the change in the state of some entities shared between the participants in the interaction. [SWIM-SERV-012]",
					"type" : "string",
					"minLength":1
				}
			}
		},

Rules expressed for the cases as defined in Registry URD.

caserules
COMPLIANTmandatory
CANDIDATEsame
DEFINITIONsame

Guidance

Express the functionality offered by the service as a list of service functions.

Within field functionality (itself within field serviceGeneralDescription) list one or more occurrences of type Functionality. 


business view

The functions provide business and operational experts with a business view of the interactions with the service, without having to look at the interface details.

The service operations provide with a technical view of the interactions (see SWIM-SERV-021 Service operations)




Functionality - Mandatory

Note: A function is a type of activity describing the functionality of a service. Every function usually (but not always) can be mapped to service operations defined as a part of the service’s interface; i.e., functions provide a “business view” and service operations provide a “technical view” of a particular service activity.

attribute namedescriptiontypeguidancerule
nameThe name of the service function.stringProvide a short name for the service functionMandatory
descriptionDescription of the service function.string

Describe the service function.

Note: A function is a type of activity describing the functionality of a service. Every function usually (but not always) can be mapped to service operations defined as a part of the service’s interface; i.e., functions provide a “business view” and service operations provide a “technical view” of a particular service activity.

Mandatory
realWorldEffectAn ultimate purpose associated with the interaction with the service. It may be the response to a request for information or the change in the state of some entities shared between the participants in the interaction. [SWIM-SERV-012]string

Guidance: describe here the real-world-effect, if any.

May be left blank if not realWorldEffect outside the sharing of information.

Note: A real world effect is an ultimate purpose associated with the interaction with the service. It may be the response to a request for information or the change in the state of some entities shared between the participants in the interaction.

Mandatory, can be empty.

Example

        "serviceGeneralDescription": {

            "functionality": [
                {
                    "name": "Set TOBT",
                    "description": "Allow the service consumer to set (i.e. define or update) the TOBT value for a specific flight.",
                    "realWorldEffect": "The Target Off-Block Time (TOBT) value is defined"
                },
                {
                    "name": "Delete TOBT",
                    "description": "Allow the service consumer to delete the TOBT value for a specific flight.",
                    "realWorldEffect": "The Target Off-Block Time (TOBT) value is undefined"
                }
            ],

        },


A complete JSON example is available in page JSON example - Donlon TOBT Setting service description.

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