Yes this is possible in ADOxx. You can define a LONGSTRING attribute for the notebook and display only a limited number of characters in the notation implementation (i.e. GRAPHREP).
The command ATTR is used to display attribute values in the GRAPHREP. The parameter "w:" of the command defines the horizontal alignment of the attribute (left, right, center) and the maximum length of the text. The parameter "h": defined the vertical alignment of the text as well as the text height. The parameter "line-break:" defines the rules for breaking the text up into lines.
The example below defines an attribute "Description" of type LONGSTRING and breaks the text up on the representation of the object.
1
2GRAPHREP
3SHADOW off
4FILL color:lightblue
5RECTANGLE x:-2cm y:-1cm w:4cm h:2cm
6ATTR "Description" line-break: words x:-2cm y:1.5cm w:l:4cm h:b:10pt