And non validating parsers with
The following example of a DOCTYPE contains both public and system identifiers: The system identifiers of these DTDs, if present in the DOCTYPE, are URI references.
A system identifier usually points to a specific set of declarations in a resolvable location.
A namespace-aware version of DTDs is being developed as Part 9 of ISO DSDL.
DTDs persist in applications that need special publishing characters, such as the XML and HTML Character Entity References, which derive from larger sets defined as part of the ISO SGML standard effort.
Nevertheless, the Ælfred parser offered some advantages over the Crimson parser included with JDK 1.4, and it is therefore now available as a free-standing download.
Programs for reading documents may not be required to read the external subset.
You are free to modify AElfred for your own use and to redistribute AElfred with your modifications, provided that the modifications are clearly documented. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of merchantability or fitness for a particular purpose.
(Notations declared in the DTD are also referencing external entities, but these unparsed entities are not needed for the validation of documents in the standalone mode of these parsers: the validation of all external entities referenced by notations is left to the application using the SGML or XML parser).
Non-validating parsers may eventually attempt to locate these external entities in the non-standalone mode (by partially interpreting the DTD only to resolve their declared parsable entities), but do not validate the content model of these documents.