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[doc] Add a shape for adding the support of non synchronized tables #4269

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== Problem

Currently, tables are synchronized regarding the semantic elements found in the model.
The table defines, inside its row description, what kind of elements the table handles and how they are retrieved.
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Rows and columns should share the same capabilities. This shape should not be specific to rows.

Currently, tables are synchronized regarding the semantic elements found in the model.
The table defines, inside its row description, what kind of elements the table handles and how they are retrieved.
So currently, whenever a compatible element is created, it is automatically added as a new row of the table.
There is no way to create a table that does not follow this mechanism. +
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Why the +?

== Key Result

As a specifier, I want to describe a table that is not synchronized. +
As a specifier, I want to define the drag & drop behavior that allows to add rows. +
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Technically, any operation should be able to add more rows. A drag and drop tool is convenient for this kind of interaction but an unsynchronized table could work without any drag and drop tools. Those are two separate subjects (synchronized and drag and drop tool)).

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It's not an issue in the shape to mix both concerns but when it will be time to implement it, create two issues and work on each task separately.


== Solution

Sirius-web will provide a `SynchronizationPolicy` in the `TableDescription` view model level that specifier could use.
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The SynchronizationPolicy should probably exist on both ColumnDescription and RowDescription.


* Create the table representation
* Assuming we have a compatible element already created in the model
* Drag and drop such an element from the Explorer panel to the table representation
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Any kind of tool should be able to perform the addition of new rows / columns

@sbegaudeau sbegaudeau removed this from the 2025.1.0 milestone Dec 22, 2024
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