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 NCS STRIct
 { <NCSstrictstatement> } END
is invoked from the main level of XPLOR.
 <NCSstrictstatement>:==

 INITialize
 erases the strict NCS database.
 NCSRelations
 <matrix> [TRANslation=<vector>]
specifies relationships in addition to XNCSrelations,
between the input coordinates and their
equivalents, to specify completely the internal symmetry
for nonbonded interactions. These must be given only after
all XNCSrelations have been given. The matrix gives
the matrix , the vector the
translation vector .
 SKEW
 <matrix> [TRANslation=<vector>]
specifies the relationship between the crystal and skew frames.
The matrix specifies the
matrix , the vector the
translation vector (for the syntax of matrix, see
Section 2.4).
(default: identity for the matrix and no translation, i.e., no skewing).
 XNCSrelations
 <matrix> [TRANslation=<vector>]
specifies the relationships between the input coordinates
and their NCS equivalents. The matrix gives the
the matrix , the vector the
translation vector . (For the syntax of matrix, see
Section 2.4.) The
XNCSrelations are used to generate the crystallographic asymmetric unit
from the protomer. The identity operation is optional.
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Sat Mar 11 09:37:37 PST 1995