Martin Bjorklund <[email protected]> writes:
> Ladislav Lhotka <[email protected]> wrote:
>> Hi,
>>
>> another ABNF issue:
>>
>> predicate = "[" *WSP (predicate-expr / pos) *WSP "]"
>>
>> predicate-expr = (node-identifier / ".") *WSP "=" *WSP
>> ((DQUOTE string DQUOTE) /
>> (SQUOTE string SQUOTE))
>>
>> pos = non-negative-integer-value
>>
>> non-negative-integer-value = "0" / positive-integer-value
>>
>> The value of 0 shouldn't be allowed for 'pos' because context position
>> in XPath is always positive, i.e. the first list entry is selected
>> with "[1]".
>
> You are right - I have changed this to:
>
> pos = positive-integer-value
Actually, there is another problem: the ABNF allows, for example
/if:interfaces/if:interface[1][2]
which doesn't make sense. So a correct version could be
instance-identifier = 1*("/" (node-identifier (*predicate / pos))
predicate = "[" *WSP predicate-expr *WSP "]"
predicate-expr = (node-identifier / ".") *WSP "=" *WSP
((DQUOTE string DQUOTE) /
(SQUOTE string SQUOTE))
pos = "[" *WSP positive-integer-value *WSP "]"
Lada
>
>
> /martin
>
>
>
>>
>> Lada
>>
>> --
>> Ladislav Lhotka, CZ.NIC Labs
>> PGP Key ID: E74E8C0C
>>
>>
>>
>>
>> _______________________________________________
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>> https://www.ietf.org/mailman/listinfo/netmod
>>
--
Ladislav Lhotka, CZ.NIC Labs
PGP Key ID: E74E8C0C
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