Apologies if this question is too easy or if I have not read the schema documentation enough.
My schema is like this: There will be a choice between one of the two groups a and b.
however if I have the following group declaration it will not pass. The error message will say that "X" cannot appear in both groups.
The strange thing is that if I have the following combination it will
However the following will work:
This means that it will only fail if the first element of both group
is the same. Anything else will pass. This seemed really strange
to a newbie like me. Is there anyway around it? By the way I am using the validator from here: