systemId (W3C DOM Core property)
| Version | Depr. | Static | Read-only |
|---|---|---|---|
| DOM2 | No | No | Yes |
| IE5.5+ | FF1.5+ | SA3+ | OP9+ |
|---|---|---|---|
| Partial | Full | Full | Full |
Example
var sysid = document.doctype.systemId;The
example above saves a reference to the systemId
of the doctype. So if we were on a page with an XHTML 1.0 Strict doctype,
the sysid variable would have the value
http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd.
Description
The system identifier of an
Entity or Notation, and in
DOM 2 of a DocumentType, or null
if no system identifier is specified.
This property is readonly.
Compatibility
| Internet Explorer | Firefox | Safari | Opera | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 5.5 | 6.0 | 7.0 | 1.5 | 2.0 | 3.0 | 1.3 | 2.0 | 3.0 | 9.0 | 9.5 |
| Partial | Partial | Partial | Full | Full | Full | None | None | Full | Full | Full |
Only
Opera, Firefox and
Safari 3 are able to retrieve the
systemId of a DocumentType. In Internet Explorer in
XML the property is undefined; in Safari 1.3
and 2 in XHTML mode or XML1 it's
null; otherwise the doctype property itself is
null.
Only Opera in XHTML mode or
XML and Internet Explorer in XML
are able to retrieve the systemId of an Entity or Notation, because those
are the only environments in which the root objects themselves are exposed
(see Entity and Notation for
details).
Footnotes
1 On XHTML pages served as
application/xhtml+xml.
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