<div dir="ltr"><div>Hi Bob,</div><div><br></div><div>In DDI 3.2 there is a specific differentiation between valid and invalid (missing values) so that they are declared separately. In PhysicalDataProduct the PhysicalStructure/DefaultMissingData can be used for this as this is a description of a specific file type (like SAS, etc.). Larry Hoyle or Achim Wackerow can probably provide more details as they were looking at the new structure for Missing Values in this context while it was being developed.</div>
<div><br></div><div>Wendy</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jun 20, 2014 at 10:26 AM, Bob McConnaughey <span dir="ltr"><<a href="mailto:bobmcconn@gmail.com" target="_blank">bobmcconn@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear Folks:<div> Do any of the DDI documentation/codebook generating packages handle extended Stata/SAS missing values? .a-.z ; "."? Our analysis datasets (as opposed to the original questionnaires) invariably use multiple sets of special missing codes, and converting every thing into faux numeric missings (-1---9) for instance kind of defeats the purpose.</div>
<div>any way forwards will be most appreciated.</div><div>thanks</div><div>bob</div><div><br><div title="signature"><p><span style="font-size:small">Bob McConnaughey, PhD.</span><br><span style="font-size:small"> Westat/NIEHS epidemiology branch contractor</span><br>
<span style="font-size:small"> <a href="tel:919-941-8300" target="_blank" value="+19199418300">919-941-8300</a> (w)</span><br>
<span style="font-size:small"> <a href="tel:919-542-5653" target="_blank" value="+19195425653">919-542-5653</a> (h)</span><br><br><span style="font-family:"comic sans ms",sans-serif;font-size:small"> "She is at the brink of never being hurt again</span><br>
<span style="font-family:"comic sans ms",sans-serif;font-size:small"> but pauses to say, All of us. Every blade of grass."</span><br>
<span style="font-family:"comic sans ms",sans-serif;font-size:small"> from <em>Kuan Yin</em>, Laura Fargas</span></p></div>
<br></div></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div>Wendy L. Thomas Phone: +1 612.624.4389</div><div>Data Access Core Director Fax: +1 612.626.8375</div><div>Minnesota Population Center Email: <a href="mailto:wlt@umn.edu" target="_blank">wlt@umn.edu</a></div>
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