Ektron CMS200/300 User Manual

4. Continue replacing all variables in the formula.
Notes
Referencing Other Calculated Fields
Explanation of Examples
Using the Data Designer
If an XML document contains several occurrences of a field
that is referenced in a formula, the value is derived as follows:
- When using the XPath functions sum() and count(), all
values with the field name are considered. For example, a
document includes three books whose prices are $10, $20
and $30. In this case, sum’s value is $60.
- When using all other functions, the first value is used. For
example, a document includes three books whose prices
are $10, $20 and $30. If a calculation formula refers to
, its value is $10.
You can replace a variable with a number instead of a field. For
example, replace {X} * {Y} with ../price * 1.15.
The expression can be complex, such as (round(Field1 * 0.80)
+ (1 div Field2)) - 2.
You can use a string expression that creates a text message.
For example, to calculate a full name from its parts: concat(
title, ' ', givenname, ' ', familyname), which could produce
"Dr. Jonathan Smythe".
A calculated field can only reference other calculated fields that
appear before it in a document. For example, a document collects
a series of numbers.
One calculated field counts the number of numbers.
Another totals their values.
A third computes the average by dividing the total by the count.
In this example, you must place the third field below or to the right
of the first two fields. Calculated fields that are defined later in a
document do not appear in the Select Field or Group dialog.
The following table explains the standard examples that appear in
the Examples drop-down list of the Calculated Field dialog. Note
Ektron CMS200/300 User Manual, Version 4.5, Revision 3 396