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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks. This is helpful.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’m also concerned regarding reusability. Some more comments:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The binding definition is a child element of QuestionItem, QuestionConstruct, and Sequence. This means each of these elements are only reusable independently
of the context if the binding is defined in the element where the InParameter is defined. This is just in other words what you said with “Binding for objects intended for reuse should be done at their point of use when possible.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The SourceParameterReference seems to combine the definition of an InParameter with a binding. I assume this can be limiting because no specific value of an
array can be addressed. I.e. a variable can be the result of a question in a row of a QuestionGrid. The binding would only be possible by means of an intermediate GenerationInstruction. Or did I miss something?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Anyway, the use of the SourceParameterReference makes a Variable not reusable.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">A thought on future DDI versions:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">A more consistent approach would be to use the same solution as an QuestionItem: the definition of an InParameter. The binding should be done independently
of the Variable to support reusable variables.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Achim<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> ddi-users-bounces@icpsr.umich.edu [mailto:ddi-users-bounces@icpsr.umich.edu]
<b>On Behalf Of </b>Wendy Thomas<br>
<b>Sent:</b> Montag, 14. Dezember 2015 15:29<br>
<b>To:</b> Data Documentation Initiative Users Group<br>
<b>Subject:</b> Re: [DDI-users] InParameter/OutParameter and Binding in Questionnaires<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">A couple of points about binding in 3.2:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">First in answer to your earlier question regarding the path of the binding from the question item to the control construct to the generation instruction to the variable. You are correct that you could bind directly from the variable to
the question. However, a question item may be used in many locations within a questionnaire (Age for example). It could be part of multiple sequences, in a loop, etc. By specifying the link between a question and its specific control construct the question
can be reused multiple times, and each time one can create a binding to its specific usage.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Binding itself may be done within the construct of the item or at the time of reference using the SourceParameterReference. This may not be as well distributed as it should be. I see it in VariableType and ConditionalTextType. This should
be reviewed for a 3.3 version. Binding to a question outparameter in an instrument should be done at the level of the control construct to keep the question reusable. In short, you can make your binding links as short as you wish for your specific needs. Binding
for objects intended for reuse should be done at their point of use when possible.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Wendy<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Sun, Dec 13, 2015 at 10:53 AM, Wackerow, Joachim <<a href="mailto:Joachim.Wackerow@gesis.org" target="_blank">Joachim.Wackerow@gesis.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Relationship class is in DDI 4.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">The related documentation says “Relationship specification between this item and the item to which it is related.”
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Using this approach for binding would conflict with the idea of reusability because the reference to a another object would be part of the object itself.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">The concept of binding is in 3.2 a little different. Two identifiable parameters are referenced by the binding definition. But the binding is a child
element of the element having a parameter. This seems to be limiting regarding reusability.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Back to the usage in DDI 3.2:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Any thoughts on the question regarding the binding definition only in the Sequence (the OutParameter of Question 1 and the InParameter of Question 2).
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">This is a DDI 3.2 question.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Achim</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:ddi-users-bounces@icpsr.umich.edu" target="_blank">ddi-users-bounces@icpsr.umich.edu</a> [mailto:<a href="mailto:ddi-users-bounces@icpsr.umich.edu" target="_blank">ddi-users-bounces@icpsr.umich.edu</a>]
<b>On Behalf Of </b>Hoyle, Larry<br>
<b>Sent:</b> Freitag, 11. Dezember 2015 20:48<br>
<b>To:</b> Data Documentation Initiative Users Group<br>
<b>Subject:</b> Re: [DDI-users] InParameter/OutParameter and Binding in Questionnaires</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Would this be an application of the Relationship classes?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">--- Larry Hoyle</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b>
<a href="mailto:ddi-users-bounces@icpsr.umich.edu" target="_blank">ddi-users-bounces@icpsr.umich.edu</a> [<a href="mailto:ddi-users-bounces@icpsr.umich.edu" target="_blank">mailto:ddi-users-bounces@icpsr.umich.edu</a>]
<b>On Behalf Of </b>Wackerow, Joachim<br>
<b>Sent:</b> Friday, December 11, 2015 12:32 PM<br>
<b>To:</b> Data Documentation Initiative Users Group (<a href="mailto:ddi-users@icpsr.umich.edu" target="_blank">ddi-users@icpsr.umich.edu</a>) <<a href="mailto:ddi-users@icpsr.umich.edu" target="_blank">ddi-users@icpsr.umich.edu</a>><br>
<b>Subject:</b> [DDI-users] InParameter/OutParameter and Binding in Questionnaires<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’m wondering where the binding can be specified and which way is best to support reusability of QuestionItems.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">This topic is documented in the Technical Documentation of DDI 3.2. There is a related diagram on page 35 (and a related example XML file InOutBindingExample). This explains that
binding is done in a chain from Question 1 up to the Sequence and then down again to Question 2. This shows all possibilities of defining bindings in this case.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">A simpler way would be to define the binding of directly in the Sequence (the OutParameter of Question 1 and the InParameter of Question 2). Then all other bindings are not necessary
and the questions are totally reusable. This would also correspond to the actual use of these two questions in the sequence. Only then the binding is important.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Are there any disadvantages to use this option?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">A more general thought: a definition of a binding is probably mostly of local use (here for questions in a sequence). Therefore it can conflict with the idea of reusability. In
this sense, a better location for binding definitions would be an independent scheme. On the other hand, if the sequence should be reused like it is it makes sense to have the binding definition in the sequence.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Achim<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
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<p class="MsoNormal">Wendy L. Thomas Phone: +1 612.624.4389<o:p></o:p></p>
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