„Dokumentumtípus-definíció” változatai közötti eltérés

If the XML document type declaration includes any SYSTEM identifier for the external subset, it can't be safely processed as standalone: the URI should be retrieved, otherwise there may be unknown named character entities whose definition may be needed to correctly parse the effective XML syntax in the internal subset or in the document body (the XML syntax parsing is normally performed ''after'' the substitution of all named entities, excluding the five entities that are predefined in XML and that are implicitly substituted ''after'' parsing the XML document into lexical tokens). If it just includes any PUBLIC identifier, it ''may'' be processed as standalone, if the XML processor knows this PUBLIC identifier in its local catalog from where it can retrieve an associated DTD entity.

 

 

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