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1 Definition 2 Functional Requirements 3 Syntax 4 Semantics

1 Definition

The Action of a Process requesting that an Execution Service:

  1. Execute a Program.
  2. Grant Rights to the Items produced by the Executed Program based on requested Rights.

If the request is accepted, the Execute Service executes the Program and sends the produced Items with embedded Rights (Status=Final).

2 Protocol

  1. If Execute Service is a free service:
    1. User produces and sends “Execute PA Request1” to Execute Service.
    2. Goto Execute.
  2. If Execute Service is a pay service,
    1. Process produces and sends “Execute PA Request1 including Service Pricing Model1 (Status=Model) with Rights1 (Status=Model)” to Execute Service.
    2. Execute Service produces and sends “Execute PA Response1 including Service Pricing Model2 (Status=Model) with Transaction1 (Status=Model)”:
      1. If “Execute PA Response1 includes Status=Err”, goto End
      2. If “Execute PA Response1 includes Status=Ack”, Process
        1. Produces “Transaction2 of Value included in Transaction1” and Transacts.
        2. Sends “Execute PA Request2 including Service Pricing Model3 (Status=Model) with Transaction2 (Status=Final)” to Execute Service.
  3. Execute: Execute Service
    1. Activates “Program”.
    2. Sends to Process:
      1. “Execute PA Response2 including Items and Rights1 (Status=Final)”.
      2. “Service Pricing Model4 (Status=Final)”, if Execute Service is a pay Service.
  4. End

 

The protocol described using Workflow Description Language (WDL) is available at this link:

https://schemas.mpai.community/MMM4/V2.2/wdl/ExecutePA.wdl

3 Syntax

The structure of the input and output messages, using JavaScript Object Notation (JSON)  is available at this link:

https://schemas.mpai.community/MMM4/V2.2/actions/ExecutePA.json

4 Semantics

Label Description
Header Execute Process Action Header – Standard “MMM-EXP-Vx.y”
MInstanceID Identifier of M-Instance.
UEnvironmentID Identifier of U-Environment.
ExecutePAID Identifier of this PA Instance.
ExecutePATime Creation time of this PA Instance.
ExecutePAData Data included in this PA Instance.
– Time Time of PA Request emission and Time of PA Request execution.
Time of PA Response emission.
– RQ-Complements Source Complements.
  – Nil ProgramID Program to be Executed.
  – With ItemIDs Items requested by Execute Program.
  – With Rights Requested Rights (Status=Model) to the Items produced by the Executed Program.
  – At ProcessID
 Process holding Items resulting from Execution.
  – With SPM Service Pricing Model, if Execute is a pay service.
– RS-Complements Destination Complements.
  – Nil ItemIDs Items produced by the Executed Program.
  – With Rights Rights (Status=Final) based on requested Rights if PA Request is accepted.
 – With PAStatus Possible Error Messages.
    – Ack If PA Request could be performed
    – Err If Error was found
      – FaultyPA Faulty PA Request.
      – IncID Incorrect ID.
      – InsRights Insufficient Rights.
      – InsValue Insufficient Value in Wallet.
DataXMData Identity, provenance, authorised usage, source, type, governance context, security, legality, and annotation of exchanged data.
 DescMetadata Descriptive Metadata.

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