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Chapter 2: The dTIMS CT Database
CalcExp
Is the attribute you are creating going to be populated by a dTIMS CT
function analysis? If it is, enter a calculated expression, otherwise
ignore this cell and dTIMS CT will assume the attribute will be stored in
the database and entered via data entry or transformation.
the expression must exist
if it is not available in the list, it could be because you have not
saved the expression or because you have not yet selected the
perspective from which the expression called the attribute.
Notes: Once the Attribute is saved without an expression
attached, it cannot ever be added or updated to include an
expression.
- Change from keyed attribute to calculated attribute
or vice versa can only be accomplished by delete and
recreate.
- Entry cannot be a typed expression, it must be a
stored expression object.
Number of
Decimals
This property is for Single or Double Attribute Types
only.
Determine on numeric fields how many decimal positions
(1-6) are required.
Enter the number of decimals you want to use when
displaying the values of the current attribute. (The value in
this cell does not affect the precision of any calculation
including the attribute, it is used for display purposes only).
Numeric Default This property is for Single, Double, Integer, or Long
Integer Attribute Types only.
Enter the value you want to use to signify that the
attribute has not yet received a value.
NJDOT Deighton dTIMS CT User Manual 31