Each document has a DOCTYPE attribute that whose value is either null or a DocumentType object.
The DocumentType object provides an interface to the entities defined for an XML document.
| Property | Description |
|---|---|
| entities | Returns a NamedNodeMap containing the entities declared in the DTD |
| internalSubset | Returns the internal DTD as a string |
| name | Returns the name of the DTD |
| notations | Returns a NamedNodeMap containing the notations declared in the DTD |
| systemId | Returns the system identifier of the external DTD |
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