[name]

DTDHandler.notationDecl(), name parameter

[system identifier]

DTDHandler.notationDecl(), systemId parameter

Notations are not required to have system identifiers if they have a public identifier. This ID should be absolutized by the parser. However, some parsers have a bug here and don't absolutize this URI -- although, because of an issue with early versions of the SAX1 and SAX2 specifications, some parsers might absolutize such URIs.

[public identifier]

DTDHandler.notationDecl(), publicId parameter

Notations are not required to have public identifiers if they have a system identifier. When provided, this value is normalized.

[declaration base URI]

Locator.getSystemId()

If a SAX event producer provides a Locator, it can be used to determine the current base URI during parser callbacks. (xml:base does not apply.)