What to write in the expression while testing a CDT in an expression rule......

@akhilt That should be quiet simple. For instance, the CDT in your case should be constructed as follows:
type!myCDT(
dateStmtBegin:date(2014,10,2),
/* I don't think hardcoding the value as 2014/10/2 will not work and will give you an error.*/
datePost:fn!today()
)

Let's say you have a nested CDT in the main CDT. Then it should be as follows:
type!myCDT(
dateStmtBegin:date(2014,10,2),
subCdt:type!mySubCDT(
field1:,
field2: and so on..
),
datePost:fn!today()
)

If you want to provide an array, make use of curly braces and include as many type! definitions as you want.

@akhilt That should be quiet simple. For instance, the CDT in your case should be constructed as follows:
type!myCDT(
dateStmtBegin:date(2014,10,2),
/* I don't think hardcoding the value as 2014/10/2 will not work and will give you an error.*/
datePost:fn!today()
)

Let's say you have a nested CDT in the main CDT. Then it should be as follows:
type!myCDT(
dateStmtBegin:date(2014,10,2),
subCdt:type!mySubCDT(
field1:,
field2: and so on..
),
datePost:fn!today()
)

If you want to provide an array, make use of curly braces and include as many type! definitions as you want.