Each Document has a doctype attribute whose value
is either null or a DocumentType object. The
DocumentType interface in the DOM Core provides an interface
to the list of entities that are defined for the document, and little
else because the effect of namespaces and the various XML schema efforts
on DTD representation are not clearly understood as of this writing.
The DOM Level 2 doesn't support editing DocumentType nodes.
A NamedNodeMap containing the general entities, both
external and internal, declared in the DTD. Parameter entities are
not contained. Duplicates are discarded. For example in:
ex SYSTEM "ex.dtd" [ <!ENTITY foo "foo"> <!ENTITY bar
"bar"> <!ENTITY bar "bar2"> <!ENTITY % baz "baz">
the interface provides access to foo
and the first declaration of bar but not the second
declaration of bar or baz. Every node in
this map also implements the Entity interface.
The DOM Level 2 does not support editing entities, therefore
entities cannot be altered in any way.
A NamedNodeMap containing the notations declared in the
DTD. Duplicates are discarded. Every node in this map also implements
the Notation interface.
The DOM Level 2 does not support editing notations, therefore
notations cannot be altered in any way.
public java.lang.String getPublicId()
The public identifier of the external subset.
DOM Level 2
public java.lang.String getSystemId()
The system identifier of the external subset.
DOM Level 2
public java.lang.String getInternalSubset()
The internal subset as a string.The actual content returned depends on
how much information is available to the implementation. This may
vary depending on various parameters, including the XML processor
used to build the document.