<div dir="ltr">
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial">Seed represents unidentified locations as
“ “ [2 empty spaces] (This is
a limitation of SEED), while most (if not all) modern languages represent such
thing as NULL. NULL does not equal “”
or “ “ or “--“. NULL is NULL and should be represented as
such. While SEED is limited, XML is not. Why should we incorporate Seed limitations
into any new XML schema. </span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial"> </span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial">Unidentified attributes (values=unidentified or
not provided or null) are omitted in XML.
When an attribute does not appear in the document, then it is NULL (no
confusion there). </span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial"> </span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial">In my opinion StationXml shouldn’t force me to
provide a value for an attribute that is unknown to me. While the purpose of
StationXml schema is to map between SEED and XML, limitations of Seed shouldn’t be carried over.</span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial"> </span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial">For historical data, software should take care
of any conversion needed. What you store
in your database is outside the scope of StationXml.</span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial"> </span></p>
<p class="MsoNormal"><span style="font-family:Arial;background-image:initial;background-repeat:initial"> </span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Times"> </span></p>
<p class="MsoNormal"> </p>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Aug 12, 2014 at 5:50 PM, Philip Crotwell <span dir="ltr"><<a href="mailto:crotwell@seis.sc.edu" target="_blank">crotwell@seis.sc.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">On Tue, Aug 12, 2014 at 7:12 PM, Doug Neuhauser<br>
<<a href="mailto:doug@seismo.berkeley.edu">doug@seismo.berkeley.edu</a>> wrote:<br>
><br>
><br>
<br>
><br>
> IF YOU WANT TO CHANGE SEED, THEN PROPOSE TO CHANGE SEED.<br>
><br>
> - Doug N<br>
><br>
><br>
<br>
</div>OK, I would like to offer a proposal to change to SEED to eliminate<br>
blank location ids.<br>
<br>
Wait, can I do that?<br>
:)<br>
<span class="HOEnZb"><font color="#888888"><br>
Philip<br>
</font></span><div class="HOEnZb"><div class="h5">_______________________________________________<br>
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</div></div></blockquote></div><br></div>