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This file is part of Logtalk <https://logtalk.org/>  
Copyright 1998-2021 Paulo Moura <pmoura@logtalk.org>  
SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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% start by loading the example:

| ?- logtalk_load(missing_data(loader)).
...


% in the first data processing example, we provide defaults for the missing data:

| ?- data_processing::print.

gomez
  father: john doe
  mother: jane doe

pubert
  father: gomez
  mother: morticia

pugsley
  father: gomez
  mother: morticia

morticia
  father: john doe
  mother: jane doe

wednesday
  father: gomez
  mother: morticia

true


% in the second data processing example, we simply skip missing data:

| ?- data_processing::print_complete.
pubert
  father: gomez
  mother: morticia

pugsley
  father: gomez
  mother: morticia

wednesday
  father: gomez
  mother: morticia

true


% in the third data processing example, we throw an error on missing data:

| ?- catch(data_processing::check, Error, true).
Error = missing_father-gomez
true
