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CommonMark must support the syntax for adding additional link attributes
For option 1
The data referenced by the token must transport additional details on which properties are supported/unsupported (e.g. in this case, target is NOT supported)
For option 2, one or both of these points must see progress
Further development is required, see Knagis/CommonMark.NET#101
Maybe additional work on CommonMark specs is required, see
The document insertion form shows as follows
There are 2 general options available
For option 1
The data referenced by the token must transport additional details on which properties are supported/unsupported (e.g. in this case, target is NOT supported)
For option 2, one or both of these points must see progress