[UI] Support for Nested Node Shape Selection

[edmondchuc]

Provide a mechanism to select a suitable node shape when multiple shapes match the node target.

Example: A user selects a value for their home country. Based on the selected country, a suitable shape matching the node value is used to display a nested address form. The nested address form may have different fields with different layout arrangement depending on the country.

Discussion:

• Clarify the example
• Does this use sh:node? Or maybe sh:or?
• More than one node shape may match. Should this prompt the user to select one? Or should there be a rule system to select the most suitable shape based on some criteria?

Links:

• SHACL 1.2 Core - sh:node
• SHACL 1.2 Core - sh:or

[edmondchuc]

Some initial comments on this topic by Thomas Francart. #523 (comment)

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As a preliminary question : how do we know that the address form should be nested ? no information in SHACL tells us this. The address could very well be placed at the same level as the country information. I wish there was something to explicitly annotate property shapes with this "nesting" information. See the JSON-LD framing topic.