XML Formal Public Identifier
paul at arbortext.com
Tue Jun 9 18:27:13 BST 1998
At 13:21 1998 06 08 -0400, Tim Bray wrote:
>At 01:12 PM 6/8/98 -0400, Daniel Pitti wrote:
>>Is there an official (W3C) Formal Public Identifier for XML? And notation
>No. XML 1.0 does not support FPIs. -Tim
I'm not sure how Tim is using "support" in this case.
In the XML Rec, production 12  is for PubidLiteral which is described
in the XML Rec  as follows:
In addition to a system identifier, an external identifier may
include a public identifier.
All FPIs are public identifiers (the set of FPIs is a subset of the
set of public identifiers).
Finally, whether or not you consider this "support" of FPIs, the original
question is not unreasonable; the W3C could still opt to define an FPI for
the XML Rec so that people could write a notation declaration such as:
<!NOTATION xml PUBLIC "-//W3C//NOTATION XML 1.0//EN">
(Note that XML notation declarations  do not require a system identifier
as external identifiers for entity declarations do.)
I am not aware of this issue being raised before, so I believe the current
answer to the question is "no, there is no official FPI for XML," but I see
no technical reason there couldn't be.
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