negative integers in ObjectIdentifierValue?

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4 total messages Started by Mark Smith Wed, 08 Apr 1992 17:41

#93

Author: Mark Smith
Date: Wed, 08 Apr 1992 17:41

25 lines
1117 bytes

While I'm sure this was not the intent, it appears that negative integers
are valid within an ObjectIdentifierValue.

My reasoning is thus:

   ISO/IEC 8824: 1990 states

   NumberForm        ::= number | DefinedValue
   NameAndNumberForm ::= identifier (NumberForm)

   28.4 The "DefinedValue" in "NumberForm" shall be a reference to a value
   of type integer, or of a type derived from integer by tagging.


Since section 28.4 does NOT restrict DefinedValue to be a reference to a
non-negative integer value, it appears valid to use negative integers in
an ObjectIdentifierValue.

Does 8824 specifically disallow negative integers in an ObjectIdentifierValue?
If so, where?

Has the intent always been to allow the use of negative integers?


Mark Smith

Re: negative integers in ObjectIdentifierValue?

#95

Author: Bancroft Scott
Date: Thu, 09 Apr 1992 14:34

12 lines
917 bytes

mds@hpcndaw.CND.HP.COM (Mark Smith) writes:

>While I'm sure this was not the intent, it appears that negative integers
>are valid within an ObjectIdentifierValue.
...
>Has the intent always been to allow the use of negative integers?

No, it never was the intent to allow the use of negative numbers within
an ObjectIdentifierValue.  Note in ISO 8825 (1990), clause 22.2, it states 
that each subidentifier is an unsigned binary number.

Bancroft Scott

Re: negative integers in ObjectIdentifierValue?

#100

Author: Mark Smith
Date: Fri, 10 Apr 1992 20:44

10 lines
770 bytes

>No, it never was the intent to allow the use of negative numbers within
>an ObjectIdentifierValue.  Note in ISO 8825 (1990), clause 22.2, it states
>that each subidentifier is an unsigned binary number.
>
>Bancroft Scott

So then, is there a defect in section 28.4 ??  Should 28.4 be limited to
a reference to an integer with a non-negative value ?

Mark Smith

Re: negative integers in ObjectIdentifierValue?

#101

Author: Bancroft Scott
Date: Sun, 12 Apr 1992 13:08

12 lines
887 bytes

mds@hpcndaw.CND.HP.COM (Mark Smith) writes:

|>No, it never was the intent to allow the use of negative numbers within
|>an ObjectIdentifierValue.  Note in ISO 8825 (1990), clause 22.2, it states
|>that each subidentifier is an unsigned binary number.

|So then, is there a defect in section 28.4 ??  Should 28.4 be limited to
|a reference to an integer with a non-negative value ?

I agree.  I'll submit it as a defect.

Bancroft Scott

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