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From: "Matthew Gertner" <matthew.gertner@s...> > That said, you led me down the garden path with this PSVI stuff. My > understanding of the PSVI (very shaky, I admit) is that it is an abstract > formalism for representing an instance with its associated schema. A Post-Schema Validation Infoset (instance) is an XML Infoset (instance) that has been augmented with information as a result of being validated by a W3C XML Schema (schema). This information could include, among other things, - defaulted values - type information - whether validation was attempted, and whether it was successful A PSVI does not necessarily conform to a schema. The augmentations as a result of schema processing could be that some elements are invalid. (This is why optimizing away "impossible paths" should be an application-dependent thing, or a distinction between XQuery and XPath2. An application may be interested in part that are invalid in order to repair them, report them, or complete the document.) A PSVI can be constructed in several ways, not merely by running the same schema on the whole document at the same time. Cheers Rick Jelliffe
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