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RE: XML Syntax/Grammar

  • From: Michael Fitzgerald <mike@w...>
  • To: "Xu, Mousheng (SEA)" <Mousheng.Xu@s...>,xml-dev@l...
  • Date: Wed, 11 Jul 2001 13:12:29 -0700

syntax grammar
BNF refers to the Backus-Nauer Form. XML 1.0 is described in Extended
Backus-Nauer Form (EBNF). Here is an example of EBNF from the XML

[3]    S    ::=    (#x20 | #x9 | #xD | #xA)+

This production means that the symbol /S/ stands for one or more occurrences
(+) of either the space (x20), the tab (x9), the linefeed (x0A), and the
carriage return (x09) characters. Whenever the /S/ shows up in the EBNF, it
represents space as described by the production [3].

See the XML recommendation [1] for a brief description of EBNF notation; see
ISO/IEC 14977 [2] for a complete description.

[1] http://www.w3.org/TR/REC-xml#sec-notation
[2] http://www.cl.cam.ac.uk/~mgk25/iso-ebnf.html

Best of luck,


-----Original Message-----
From: Xu, Mousheng (SEA) [mailto:Mousheng.Xu@s...]
Sent: Wednesday, July 11, 2001 12:01 PM
To: xml-dev@l...
Subject: XML Syntax/Grammar

Hi there,

What is the BNF of XML document?


-- Mousheng Xu

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