t that the parser resolve the entity itself, that it use an alternative URI, or that it use an entirely different input source.<p>
Application writers can use this method to redirect external system identifiers to secure and/or local URIs, to look up public identifiers in a catalogue, or to read an entity from a database or other input source (including, for example, a dialog box).<p>
If the system identifier is a URL, the SAX parser must resolve it fully before reporting it to the application.<p>
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