[QTI] Two correct answers for text entry

[Mark Breuker]

Hi all,

I have a question about text entry questions (QTI v2). 

The R2Q2 website (http://r2q2.qtitools.org/r2q2) QTI website has a
sample based on the textEntry sample that can be found on the IMS
website:

http://www.imsglobal.org/question/qti_v2p0/examples/items/text_Entry.xml

It defines answers: "York" and "york". "York" (with capital Y) is
considered the correct answer and "york" is considered incorrect.
However the user is awarded 0.5 points for "york" (he was pretty close
after all).

Now consider the following question where there are two possible
answers:

"He is called"
"He's called"

Both could be considered equally correct, however only one can be
defined as THE correct answer in QTI v2.

How should this text entry scenario with two equally correct answers be
defined in QTI v2?

Thanks,

Mark Breuker
Leidse Onderwijsinstellingen