International
Tables for
Crystallography
Volume G
Definition and exchange of crystallographic data
Edited by S. R. Hall and B. McMahon

International Tables for Crystallography (2006). Vol. G. ch. 5.2, p. 492

Table 5.2.3.2 

N. Spadaccini,a* S. R. Hallb and B. McMahonc

a School of Computer Science and Software Engineering, University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia,bSchool of Biomedical and Chemical Sciences, University of Western Australia, Crawley, Perth, WA 6009, Australia, and cInternational Union of Crystallography, 5 Abbey Square, Chester CH1 2HU, England
Correspondence e-mail:  nick@csse.uwa.edu.au

Table 5.2.3.2 | top | pdf |
Value-matching operators in Star_Base conditional requests

Requests are of the form <data request> <operator> <text string>. The second column describes the relationship that data identified by the <data request> must satisfy against the <text string> in order to be returned as part of the result set.

Operator Relationship
Text comparison operators:
[\sim=] Is identically equal to
?= Includes as a substring
[\sim\lt] Is less than (in ASCII order)
[\sim\gt] Is greater than (in ASCII order)
[\sim!=] Is not identically equal to
?!= Does not include as a substring
[\sim\lt=] Is not greater than (in ASCII order)
[\sim\gt=] Is not less than (in ASCII order)
   
Numerical comparison operators:
= Is equal to
< Is less than
> Is greater than
!= Is not equal to
<= Is not greater than
>= Is not less than