This post has a special post type called "Child Post". This allowed to specify a parent post ID. Consequently, this child post is linked to: Custom Fields Example (https://blog.ibrothers.ch/index.php/a/custom-fields-example).
This also allows us to access the custom fields of the parent post:
| First numeric field: | 123 |
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| Second numeric field: | 456 |
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| First string field: | abc |
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| Define you own labels: | Enter your own values |
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| Multiline plain text field: | This is a sample text field.
It can have multiple lines. |
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| Multiline HTML field: | This is an HTML field. |
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It is also possible to selectively display only a couple of these fields:
| First numeric field: | 123 |
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| First string field: | abc |
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| Second numeric field: | 456 |
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Finally, we can also display just the value of a specific field, like this abc.