Parameters in Start_WF_Process

Hi All,

I just want to know how the values are passed to the parameters in "PO_REQAPPROVAL_INIT1.Start_WF_Process".

I am concerned about the parameter named 'EmailFlag'. For few POs this value is 'Y' and for few others it is 'N'.

So, I want to understand how the values are passed to this procedure in runtime.

PROCEDURE Start_WF_Process

  ( ItemType               VARCHAR2,

    ItemKey                VARCHAR2,

    WorkflowProcess        VARCHAR2,

    ActionOriginatedFrom   VARCHAR2,

    DocumentID             NUMBER,

    DocumentNumber         VARCHAR2,

    PreparerID             NUMBER,

    DocumentTypeCode       VARCHAR2,

    DocumentSubtype        VARCHAR2,

    SubmitterAction        VARCHAR2,

    forwardToID            NUMBER,

    forwardFromID          NUMBER,

    DefaultApprovalPathID  NUMBER,

    Note                   VARCHAR2,

    PrintFlag              VARCHAR2,

    FaxFlag                VARCHAR2,

    FaxNumber              VARCHAR2,

   EmailFlag              VARCHAR2,

    EmailAddress           VARCHAR2,