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That Unicode with its extremely large character set would become a solution to any and all character encoding problems in itself was never the case. Usually, fo
by tannhaeuser 5y ago
That Unicode with its extremely large character set would become a solution to any and all character encoding problems in itself was never the case. Usually, for a given document you'll want to declare the subset that's actually in use such that a particular font with necessarily limited coverage can be used to render it. That's what's available for SGML markup documents eg in an SGML declaration, where you can declare and construct a document character set from planes or arbitrary code point ranges, and an SGML parser can verify actual content against that subset.
- froh 5y agoWas that capability dropped in the transition from sgml to XML? If so, can someone here on HN provide some pointers to the old discussion?
- tannhaeuser 5y agoAll discussion related to create XML as an SGML subset can be found on the xml-dev mailing list [1], with some earlier discussions and initial drafts of the SGML ERB mostly linked from there. The capability to declare document character sets was dropped along with supporting an SGML declaration altogether. [1]: http://lists.xml.org/archives/xml-dev/ http://lists.xml.org/archives/xml-dev/