From: "Simon St.Laurent" <simonstl@[...].com> 

>  Joe English writes:
>  > AFAICT, it's not so much the idea of an augmented infoset
>  > that people find disagreeable about the PSVI, it's the
>  > nature (and quantity!) of the data that a W3C XML Schema
>  > validator adds to the Infoset.
>  
>  Yes.

When people talk about "infoset augmentation" they often talk at
cross purposes, because there are three different meanings. These
need to be clearly distinguished.

1) augmented infoset = more information items of the kinds in XML Infoset spec are added to 
an existing document
2) augmented infoset = new kinds of information items are added/linked to an existing docume
nt.
3) augmented infoset = information items are declared to have a type; that type has properti
es or facets;
     functions that act on data can be type-checked and the type information for function si
gnatures 
     or used for storage etc.

The first brings up no serialization issues and works with existing technologies.

The second raises serialization and architecture issues.  

The third raises no serialization errors.  

It would be better to have separate terms for these. For example, "augented XML infoset",
"typed infoset",  "type signature". 

Cheers
Rick Jelliffe



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