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Re: [sdpd] PDF-4 - More data ???
Armel:
The numbers are as you indicated for our first release of the RDB:
PDF-4/Full File 2002.
However, the information content within entries has increased in the RDB:
* For nearly all calculated entries from ICSD, the fully digitized
pattern is generated and the data are exportable in CIF format
* For almost all experimental entries an approximate digitized pattern
is available and the data are exportable in CIF format
* For many organic entries, a 2D structure is available
Overall the size of the PDF-2 is ~ 670 MB
while PDF-4 is contained on a 4 CD set that consumes ~2 GB storage,
alternatively offered on a single DVD-ROM.
We plan subsequent releases of the PDF-4/Full File in spring each year, so
new data will first appear in the RDB Release, followed by PDF-2 Release in
the fall.
In addition:
* The RDB database license is less expensive
* The viewer program used to search and display the PDF-4/Full File
2002 is integrated into the RDB
* More powerful search structures are available in PDF-4/Full File 2002
best regards,
John
At 03:29 PM 7/16/2002 +0200, you wrote:
>Hello,
>
>I just received the PDF-4 announcement by normal mail.
>
>The advertisement says :
> More data
> More savings
> More software
> More capability
>
>About the last 3 points, I don't know. But about "More data",
>let us compare the numbers of entries in PDF-2001 and
>PDF-4/Full File 2002 :
>
> 2002 2001
>Total entries 136895 136895
>inorganics 114546 114546
>organics 24133 24133
>
>So, where exactly are these "more data" ?
>
>Best
>
>Armel
>
>
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
John Faber, Ph.D.
Principal Scientist
International Centre for Diffraction Data
12 Campus Boulevard
Newtown Square, PA 19073-3273, USA
+1-610-325-9814 (phone)
+1-610-325-9823 (fax)
faber...@icdd.com (e-mail)
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