Align the teaching source and language contract with compact defaults

examples/release1/oa/behavior/process_oa_response.arcadia

@@ -1,6 +1,4 @@
 oa_process oa_response "Handle a pressure alarm" id "58bae2b0-f560-50f2-818d-19091d22d18a" {
-    description "";
-    parent none;
     steps [@oa_assess_step, @oa_decision, @oa_reset_step, @oa_use_field, @oa_merge, @oa_confirm_step];
 }
 
@@ -10,23 +8,16 @@ oa_occurrence oa_assess_step "Assess the alarm" id "0b07b9ed-492d-57f6-b0b1-ce8a
             sequence @oa_assessment_procedure;
         };
     };
-    description "";
     parent @oa_response;
-    postcondition "";
-    precondition "";
 }
 
 oa_occurrence oa_confirm_step "Confirm safe pressure" id "e00594a3-6122-5a6b-b3c2-ecb5506c741d" {
     body {
         Action {
             action @oa_confirm;
-            lifeline none;
         };
     };
-    description "";
     parent @oa_response;
-    postcondition "";
-    precondition "";
 }
 
 oa_occurrence oa_decision "Can a remote reset safely recover pressure?" id "b280c6ca-e5f9-5424-a5c1-5676e01c2371" {
@@ -35,10 +26,7 @@ oa_occurrence oa_decision "Can a remote reset safely recover pressure?" id "b280
             kind Choice;
         };
     };
-    description "";
     parent @oa_response;
-    postcondition "";
-    precondition "";
 }
 
 oa_occurrence oa_merge "Recovery path completed" id "6b945a6d-6aa0-5dd3-96e6-2e8d757d167d" {
@@ -47,23 +35,16 @@ oa_occurrence oa_merge "Recovery path completed" id "6b945a6d-6aa0-5dd3-96e6-2e8
             kind Merge;
         };
     };
-    description "";
     parent @oa_response;
-    postcondition "";
-    precondition "";
 }
 
 oa_occurrence oa_reset_step "Try the authorized remote reset" id "d2026fc2-74a8-5e22-9942-ff3eb68a3677" {
     body {
         Action {
             action @oa_reset;
-            lifeline none;
         };
     };
-    description "";
     parent @oa_response;
-    postcondition "";
-    precondition "";
 }
 
 oa_occurrence oa_use_field "Use the field repair procedure" id "fc6763bf-a534-54bf-afcd-57ab285ff07d" {
@@ -72,56 +53,42 @@ oa_occurrence oa_use_field "Use the field repair procedure" id "fc6763bf-a534-54
             sequence @oa_field_procedure;
         };
     };
-    description "";
     parent @oa_response;
-    postcondition "";
-    precondition "";
 }
 
 sequence_link oa_assess_then_decide "Continue" id "109e2d6b-7e86-5934-93a5-fab56eced84e" {
-    description "";
-    guard "";
     source @oa_assess_step;
     target @oa_decision;
 }
 
 sequence_link oa_field_path "else" id "c1adbbd0-a762-5ee3-8b9a-5c18af377771" {
-    description "";
     guard "else";
     source @oa_decision;
     target @oa_use_field;
 }
 
 sequence_link oa_remote_path "remote reset is authorized" id "76218d89-68fd-531d-b35b-90c5b769a5ef" {
-    description "";
     guard "remote reset is authorized";
     source @oa_decision;
     target @oa_reset_step;
 }
 
 sequence_link oa_confirm_path "Continue" id "229ee94f-d147-50f6-9769-b5bd0c03a084" {
-    description "";
-    guard "";
     source @oa_merge;
     target @oa_confirm_step;
 }
 
 sequence_link oa_remote_merge "Continue" id "bac43d3b-910b-5bdc-be9b-f78cf973e1ed" {
-    description "";
-    guard "";
     source @oa_reset_step;
     target @oa_merge;
 }
 
 chain_involvement oa_response_delivery "Chain involvement: Restore a safe supply" id "c7c248f8-28b8-55be-9023-0991d44021e3" {
-    description "";
     source @oa_response;
     target @oa_restore;
 }
 
 sequence_link oa_field_merge "Continue" id "c8593670-8906-530f-b6a2-3ada77a9c219" {
-    description "";
-    guard "";
     source @oa_use_field;
     target @oa_merge;
 }