There are two posts somewhat similar to your suggestion: Probables or Possibles Child and/or adopted by father or adopted by mother.

Suggestions are welcome.

I would also appreciate this possibility for indicating "possible/probable" children as I also use the census returns for my England research on line.

England only has the BMD Indexes whereas Scotland also has the images of the full BMD Entries showing parents and full dates and places at Scotlands People though this is not free.

I have many entries in my tree that are taken from Census images or extracts that I would like to indicate as "possible" with a broken line different from "adopted" or "foster"

I am preparing for my major Christmas update of my trees.

A (interim?) solution could be to define two Custom Tags for Pedigree Links, CertaintyLevel & CertaintyParent. The first would have values 0=definite (default), 1=probably, 2=possibly, 3=perhaps. The second tag indicates about which parent the uncertainty exists : 0=father,  1=mother, 2=both.

These would be translated via the Dictionary when generating a Narrative Report. So we would have:

Jane's father is possibly John Doe and her mother is Mary Bloggs.

or if CertaintyParent=2 and level=1

Jane's father is probably John Doe and her mother is probably Mary Bloggs. 

On the parents page maybe the child's name under the Children subsection could be qualified with the uncertainty level e.g.

Jane Doe (John Doe is possibly her father)

It would be nice to show a probable link as a dotted line. But although GenoPro allows you to make a dotted line (i.e. foster link) solid, contrarily it does not allow a solid line to become dotted! It would be better if the 'solid line' check box in the Pedigree Link Properties was ticked when the line is solid by default, and allow the user to uncheck it to produce a dotted line when required.

I haven't yet got my head round all these CustomTags so would prefer it to be a part of GenoPro with an option in the pedigree link drop down menu. It would be a lot simpler for the less technically minded like me.

I am more in favor of a separate link because there is a lot of heavy code already under the current Pedigree Link.  The current pedigree link is the backbone to locate parents, children, siblings, ancestors and descendants.  Changing the internal structure of the current pedigree link is quite a task and risky.  On the other hand, a new type of object, similar to the pedigree link is much easier.  Also, it would be easier to query those "probable children" by just quering how many such links are connected to an individual.

rgds,

Ronald