Banibrata Dutta wrote:
Hi,
Could someone explain as to if the "..." can be followed by a data field ?
e.g.
My-Type ::= SEQUENCE {
my-Field-1 MY-FIELD-1,
my-Field-2 MY-FIELD-2,
...,
my-Field-X MY-FIELD-X -- can my-Field-X follow "..." ??
}
or must it be... ?
Yes, my-Field-X may follow the dots.
Moreover, one could write something like this:
My-Type ::= SEQUENCE {
my-Field-1 MY-FIELD-1,
my-Field-2 MY-FIELD-2,
...,
my-Field-X MY-FIELD-X,
...,
my-Field-Y MY-FIELD-Y
}
that is, two three blocks of sequence members, separated
by two ellipses.
This is described in X.680, #24.1, or in Olivier Dubuisson's book,
"ASN.1 Communication between heterogeneous systems", #12.2.2(3).
My-Type ::= SEQUENCE {
my-Field-1 MY-FIELD-1,
my-Field-2 MY-FIELD-2,
...,
my-Field-X MY-FIELD-X OPTIONAL -- is "OPTIONAL" mandatory
here ??
}
OPTIONAL is not mandatory, yet it may be explicitly given.
also, is NULL, a predefined type ?
please clarify.
--
Lev Walkin
[EMAIL PROTECTED]
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