PDF Editorial Staff Subcommittee Agenda and Minutes

APPROVED MINUTES
Editorial Staff  Subcommittee
March 28, 2000
ICDD Headquarters
Chairman - W. Frank McClune

The meeting was convened by Frank McClune at 16:44.

Mike Bennett reviewed known problems in the ICSD database.
These include:

  • Precision on all dimensions (solved by Mike Bennett and Harlan Clark through software changes).
  • Temperature factors (no automated way to detect bad data).
  • Duplicates (sometimes only a minor difference in one or more parameters).
  • Space groups in nonstandard settings (e.g., x,y,z permuted but a,b,c not changed accordingly).

Mike Bennett reviewed editorial problems. These include:

  • 999* data (some patterns are scaled to 100, others to 999).
  • Previously, on the Strong Lines and Long Lines cards, reflections with intensities > 104 were flagged as ‘G’. Now, they are scaled correctly.
  • Nonstandard space groups (e.g., P3m -> P3-m). Space groups now conform to the latest International Tables policy.
  • Instrument description limitations. Mike elicited help from our members in updating the descriptions.
  • AIDS limitations. Some additional checks are needed.
  • Compensating slit data. Automatic conversion between data types is needed.
  • Testing and checking for errors. More enhancements are needed.

 

Frank McClune discussed duplicates in the ICSD database. ~3,000 entries are now flagged ‘A’ (assign to alternate data set) on CARD1(1)(72:72). ~500 have been marked ‘D’ (deleted). 

Mike Bennett discussed the status of the Editorial RDB (relational database). There is no longer an AIDS format. The editorial tables will be different from the user tables. For example, we will store the authors’ original data, even though we will not publish it. We are still modifying the table structure, as well as continuing to enhance the data checking. Other enhancements will be made as the process continues. 

Jim Kaduk discussed the philosophy of our products. Customers appreciate the fact that our database is highly edited. This gives us a competitive advantage over the producers of other databases. 

John Faber reviewed some of the facets of our contract with Cambridge. We pay only for patterns which are acceptable to us and are used in our product. We have tried to profit from mistakes made with the ICSD project and be more efficient with the Cambridge database. 

The meeting was adjourned at 17:31. 

Respectfully submitted,
Harlan E. Clark, Ph.D.
Staff Scientist