| Draft 04 | Draft 06 | Draft 07 | Draft 2019-09 | Draft 2020-12 |
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Validation
The value of this keyword MUST be a string. This string SHOULD be a valid regular expression, according to the ECMA 262 regular expression dialect.
A string instance is considered valid if the regular expression matches the instance successfully. Recall: regular expressions are not implicitly anchored.
Graphical Representation
The constraint is represented in line within the diagram, properties with the icon 
apply to instance string values.
Constraints are also shown in the property grid when the containing schema is selected.
If the schema is not allowed to contain a string value then constraint is ignored, and not shown in the property grid.
The constraint values are also shown on the tooltips (select and hover over an item in the diagram).
Editing
Its value can be edited in the following ways
- In place on the schema object by expanding the properties and clicking on it once it is already selected.
- Edited via the properties window when the containing schema is selected
- Edited directly in the Json Source view.
It can be deleted by selecting it and pressing delete, or right clicking it an pressing delete.