How to obtain a subset of text in a Rich text field?

This field used to be a Text List field, but due to size limitations I’m trying to make it a Rich Text field instead.

I used to use a @transform to pull together all rows with a particular prefix. How can I simulate that on a Rich text field?

please and thank you

Subject: How to obtain a subset of text in a Rich text field?

you can achieve the same without the richtext field if you set the isSummary of the Notesitem class to False

NOTE: if this property is set to false this field will NOT be usable/displayed in any views.