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<p>Dear COD team,</p>
<p>thank you very much for putting up such a nice database. I am relying on it because our university cannot afford to pay the money for the CSD. I appreciate a lot the sql-interface.</p>
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<p>The reason why am writing is I have several questions.</p>
<p>1.) I am/was writing some tcl-tk-scripts to search for compounds and a useful strategy which I used in other databases was to suppress all unwanted elements to produce all possible structures in a composition space which could be compared with experimental
data. For the COD I stumbled over a problem. Such a search produces a lot of structures where the
<b>composition formula </b><b>is missing.</b> <br>
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<p>I also fond a number of entries <b>with missing fractional coordinates </b>or where only a unit cell was specified but no structure was provided (elements markes as "?").</p>
<p>Is it intended to have such structures in the database or are such structures "unwanted"?</p>
<p>I saw that upon submission there is a quality check which I think should stop such structures from deposition in the database.</p>
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<p>2.) How can I mark a structure as disordered upon submission?</p>
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<p>3.) How can I help to revise errors of structures which I find in the database which have not been submitted by me?</p>
<p>I am sorry if I should have overlooked answers in the COD wiki, but I didn't find the information there.</p>
<p>Best regards, <br>
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<p>Jörn Schmedt auf der Günne</p>
<p><a href="https://www.chemie-biologie.uni-siegen.de/ac/jsadg" class="OWAAutoLink">https://www.chemie-biologie.uni-siegen.de/ac/jsadg</a></p>
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