From: Michael Kay <mike@sa...> - 2007-08-24 22:05:39
The term originates in the XML specification, where references from one
entity to another (for example from a document entity to an external DTD)
can appear in the form of an ExternalID, which has the syntax:
 ExternalID ::= 'SYSTEM' S SystemLiteral | 'PUBLIC' S PubidLiteral S
and the text goes on to say "The SystemLiteral is called the entity's
*system identifier*. It is a URI, which may be used to retrieve the
I dare say the term originates with SGML, but that's speculation.
So it's just another name for the URI of a document.
> -----Original Message-----
> From: saxon-help-bounces@...
> [mailto:saxon-help-bounces@...] On Behalf
> Of Timothy Marc
> Sent: 23 August 2007 21:52
> To: SaxonHelp
> Subject: [saxon] SystemID
> Hello all,
> what the hell is the systemID, correspondig with xml in java?
> I found this in the Java-API, in Saxon and in JDOM. What
> stands the String systemID for?
> Thx very much.
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From: David Carlisle <davidc@na...> - 2007-08-24 22:16:10
> I dare say the term originates with SGML, but that's speculation.
> So it's just another name for the URI of a document.
yes where it was a slot for explicitly system-specific syntax, a unix
path, a VMS path, DOS, whatever. XML uses the same slot, with the same
name but of courses uses the URI layer to move the mapping to system
specific file paths elsewhere (unfortunately that place is the
spectacularly under specified and inconsistently implemented file: uri
scheme, but so be it:-)
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