Definition:
Codes defining conditions on the _type specification.
'su' permits a number string to contain an appended standard
uncertainty number enclosed within parentheses. E.g. 4.37(5)
'esd' is a deprecated synonym for 'su', arising from the
former use of the term 'estimated standard deviation'
for 'standard uncertainty', and permitting a number string to
contain an appended standard deviation within parentheses.
E.g. 4.37(5)
'seq' permits data to be declared as a sequence of values
separated by a comma <,> or a colon <:>.
* The sequence v1,v2,v3,. signals that v1, v2, v3, etc.
are alternative values.
* The sequence v1:v2 signals that v1 and v2 are the boundary
values of a continuous range of values satisfying the
requirements of _enumeration for the defined item.
Combinations of alternative and range sequences are permitted.
May appear in list
The data value must be one of the following:
|
none | no extra conditions apply to the defined _type |
|
esd | synonym for su |
|
seq | data may be declared as a permitted sequence |
|
su | numbers *may* have s.u.'s appended within parentheses |
Type: char
Category: type_conditions
Copyright © 2005 International Union of Crystallography