% Load a requirements set file and add two new requirements
 
rs = slreq.load('C:\MATLAB\My_Requirements_Set_1.slreqx');
req1 = add(rs, 'Id', '5', 'Summary' , 'Additional Requirement'); 
req2 = add(req1, 'Id', '5.1', 'Summary' , 'Additional Child Requirement');

% Find the parent of req2
parentReq1 = parent(req2)

parentReq1 = 

  Requirement with properties:

             Id: '5'
        Summary: 'Additional Requirement'
       Keywords: [0×0 char]
    Description: ''
      Rationale: ''
            SID: 10
      CreatedBy: 'John Doe'
      CreatedOn: 05-Oct-2007 16:09:38
     ModifiedBy: 'Jane Doe'
     ModifiedOn: 21-Dec-2016 11:10:05
       Comments: [0×0 struct]

% Find the parent of req1
parentReq2 = parent(req1)

parentReq2 = 

  ReqSet with properties:

             Description: ''
                    Name: 'My_Requirements_Set_1'
                Filename: 'C:\MATLAB\My_Requirements_Set_1.slreqx'
                Revision: 6
                   Dirty: 1
    CustomAttributeNames: {}