Hello ,
Is it allowed to use ANY in the new ASN.1 (97) descriptions?
If not can you please specify subtitution for this structure( esp. ANY)?
E.g.
XXArg ::= SEQUENCE {
errorId Error,
cause ANY OPTIONAL}
Warm regards,
Vasa
-----Original Message-----
From: Ed Day [mailto:[EMAIL PROTECTED]]
Sent: Friday, July 05, 2002 10:17 PM
To: [EMAIL PROTECTED]
Subject: Re: [ASN.1] Question on XER encoding of SEQUENCE OF element
types
Hi John,
> However, I think your question is slightly obscure! Any value of B (as
> the root type) will start <B> and end </B>. But if we have B embedded
> in a sequence:
>
> C::= SEQUENCE {
> .......
> comp B,
> .......
> }
>
> then we would get the fragment:
>
> <comp><a>1</a><a>29</a><a>3</a></comp>
True, but the issue is not on a SEQUENCE, it is on a SEQUENCE OF where the
rules are not as clear (at least to me). No matter what you have in a
SEQUENCE, the element name tag always replaces the type name tag (unless it
is unnamed which is now illegal anyway). In SEQUENCE OF, sometimes typename
is used as an explicit tag, sometimes it is not. The proposed ammended text
would make it clear.
Regards,
Ed
----- Original Message -----
From: "John Larmouth" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Thursday, July 04, 2002 5:29 AM
Subject: Re: [ASN.1] Question on XER encoding of SEQUENCE OF element types
> (I am copying this to asn1edit, as it may need to be registered as a
> defect.)
>
>
> Ed, text that covers defined types:
>
> 25.10 If the first alternative of "XMLDelimitedItem" is used, then if
> the component of the sequence-of type (after ignoring any tags) is a
> "typereference" or an "ExternalTypeReference", then the
> "NonParameterizedTypeName" shall be that "typereference" or
> "ExternalTypeReference", otherwise it shall be the "xmlasn1typename"
> specified in Table 4 corresponding to the built-in type of the
> component.
>
> But this relates only to the tag to be used *if* XMLDelimiteditem" is
> needed. For a CHOICE type, it is NOT needed.
>
> The problem is really with 25.5, which says
>
> where the "Type" of the component is listed in ....
>
> but should in fact say
>
> where the type of the component (after de-referencing of any type
> references) is listed in ....
>
> I think this should be regarded as a defect, and mended in due course.
>
> However, I think your question is slightly obscure! Any value of B (as
> the root type) will start <B> and end </B>. But if we have B embedded
> in a sequence:
>
> C::= SEQUENCE {
> .......
> comp B,
> .......
> }
>
> then we would get the fragment:
>
> <comp><a>1</a><a>29</a><a>3</a></comp>
>
> John L
>
>
>
> > Ed Day wrote:
> >
> > Hi,
> >
> > In looking at Clause 25 of the 2002 X.680 pre-release, I am unable to
> > determine how an element of a SEQUENCE OF type is to be encoded when a
> > defined type that references one of the ValueList case types is
> > referenced. For example:
> >
> > A ::= CHOICE {
> > a INTEGER,
> > b BOOLEAN
> > }
> >
> > B ::= SEQUENCE OF A
> >
> > Would a single element of choice a with value 1 be encoded as
> > <A><a>1</a></A> or <a>1</a>?
> >
> > 25.6 through 25.8 talk about TaggedType, ConstrainedType, and
> > SelectionType rules, but I see no mention of DefinedType. Am I
> > missing something?
> >
> > Regards,
> >
> > Ed Day
> > Principal Engineer
> > Objective Systems, Inc.
> > [EMAIL PROTECTED]
> > (484) 875-3020 (main)
> > (610) 608-4930 (mobile)
> > (610) 321-0361 (fax)
> > (877) 307-6855 (toll-free)
> >
> >
> >
>
> --
> Prof John Larmouth
> Larmouth T&PDS Ltd
> (Training and Protocol Development Services)
> 1 Blueberry Road
> Bowdon [EMAIL PROTECTED]
> Cheshire WA14 3LS Tel: +44 161 928 1605
> England Fax: +44 161 928 8069
