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revision 2310 by volute@g-vo.org, Wed Oct 16 11:14:36 2013 UTC revision 2311 by marco.merot@gmail.com, Thu Oct 24 14:39:23 2013 UTC
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217    differently targeted resources at client level.    differently targeted resources at client level.
218    </p>    </p>
219    <p>    <p>
220    This change in the already existing standard will require small or no    This change in the already existing standard will require only
221    changes on the already registered resources (MM provide a couple of    a small effort to update already registered resources because 97% of
222    figures to justify this!) and thus will not disrupt what exists or    them currently have ContentLevel set to <i>research</i>, 2% of them have
223    trouble VO publishers.    no ContentLevel defined and only the remaining 1% have a different value
224      (or set of values) set for this element (Appendix A details better these
225      figures).
226    </p>    </p>
227  </div> <!-- subsection contentlvl -->  </div> <!-- subsection contentlvl -->
228    
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370    
371  <div class="appendices">  <div class="appendices">
372  <div class="section">  <div class="section">
373  <h1>An appendix</h1>  <h2><a id="clcurrval">ContentLevel values summary</a></h2>
374  </div>  <p>
375  </div>  This appendix reports some statistics on the usage of the ContentLevel
376    element in <cite>std:VOR</cite> as of 2013-10-24, taken from the
377    GAVO RegTAP endpoint
378    http://dc.zah.uni-heidelberg.de/__system__/tap/run/tap .
379    There are 14044 useful resources (excluding authorities, standards and
380    similar) that expose 27 different values as their ContentLevel.
381    In the following table these values are reported in order of count.
382    </p>
383    <p>
384    <table class="plain">
385    <thead>
386    <tr>
387     <th>count</th> <th>content_level string</th>
388    </tr>
389    </thead>
390    <tbody>
391    <tr class="even">
392     <td>13623</td> <td>research</td>
393    </tr>
394    <tr>
395     <td>279</td> <td>&nbsp;</td>
396    </tr>
397    <tr class="even">
398     <td>31</td> <td>general#university#research#amateur</td>
399    </tr>
400    <tr>
401     <td>29</td> <td>university#research</td>
402    </tr>
403    <tr class="even">
404     <td>24</td> <td>university</td>
405    </tr>
406    <tr>
407     <td>14</td> <td>university#research#amateur</td>
408    </tr>
409    <tr class="even">
410     <td>6</td> <td>general</td>
411    </tr>
412    <tr>
413     <td>5</td> <td>research#general</td>
414    </tr>
415    <tr class="even">
416     <td>4</td> <td>general#research</td>
417    </tr>
418    <tr>
419     <td>3</td> <td>secondary education#community college#university#research#amateur</td>
420    </tr>
421    <tr class="even">
422     <td>3</td> <td>elementary education#middle school education#secondary education</td>
423    </tr>
424    <tr>
425     <td>3</td> <td>research#university#community college</td>
426    </tr>
427    <tr class="even">
428     <td>2</td> <td>general#university#research</td>
429    </tr>
430    <tr>
431     <td>2</td> <td>general#elementary education#middle school education#secondary education#community college#university#research#amateur#informal education</td>
432    </tr>
433    <tr class="even">
434     <td>2</td> <td>general#informal education</td>
435    </tr>
436    <tr>
437     <td>2</td> <td>research#amateur#university#community college</td>
438    </tr>
439    <tr class="even">
440     <td>2</td> <td>research#university</td>
441    </tr>
442    <tr>
443     <td>1</td> <td>general#university#research#informal education</td>
444    </tr>
445    <tr class="even">
446     <td>1</td> <td>research#university#amateur</td>
447    </tr>
448    <tr>
449     <td>1</td> <td>university#research#general#informal education</td>
450    </tr>
451    <tr class="even">
452     <td>1</td> <td>general#secondary education#university#research</td>
453    </tr>
454    <tr>
455     <td>1</td> <td>elementary education#middle school education#secondary education#community college#university#research#amateur</td>
456    </tr>
457    <tr class="even">
458     <td>1</td> <td>elementary education#middle school education#secondary education#community college#university#research#amateur#informal education</td>
459    </tr>
460    <tr>
461     <td>1</td> <td>university#research#amateur#informal education</td>
462    </tr>
463    <tr class="even">
464     <td>1</td> <td>university#community college#research</td>
465    </tr>
466    <tr>
467     <td>1</td> <td>general#university#research#amateur#informal education</td>
468    </tr>
469    <tr class="even">
470     <td>1</td> <td>elementary education#middle school education#secondary education#community college#university#research</td>
471    </tr>
472    </tbody>
473    </table>
474    </p>
475    <p>
476    This table can be easily updated from the same endpoint (or an analogue
477    one) using the following ADQL query:
478    <pre>
479    SELECT
480      count(*) as cnt, content_level
481    FROM
482      rr.resource
483    WHERE
484      res_type != 'vstd:servicestandard' and
485      res_type != 'vg:authority' and
486      res_type != 'vstd:standard' and
487      res_type != 'vr:organization'
488    GROUP BY content_level
489    ORDER BY cnt DESC
490    </pre>
491    The table shows that only about 1% of the ContentLevel values use
492    something different and more complex than <i>research</i>, when
493    the element is not empty. Morever, of this 1% (142 resources), 56
494    include the <i>general</i> value (roughly 40% of them), 27 (19%)
495    state that are only devoted to some <i>educational</i> level, 36 (25%)
496    can work both in <i>research</i> and <i>education</i> and the
497    remaining 23 (16%) report <i>research</i>, <i>amateur</i> and some
498    level of <i>education</i> alltogether.
499    </p>
500    </div> <!-- end clcurrval-->
501    </div> <!-- end appendices -->
502    
503  <div class="section-nonum">  <div class="section-nonum">
504  <h2><a id="references"/><span class="secnum"/>References</h2>  <h2><a id="references"/><span class="secnum"/>References</h2>

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