productionset — A set of EBNF productions
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productionset is a collection of
Extended Backus-Naur Form (EBNF)
EBNF is a notation for describing the grammar of context-free languages. Even if you aren’t conversant in the programming language concepts of context-free languages and grammars, it’s not really as hard to understand as it sounds.
Formatted as a displayed block. The detailed processing expectations with respect to individual productions, lefthand sides, and righthand sides are quite complex.
productions should be numbered.
A set of EBNF productions describes the legal arrangements of tokens in a language. Consider arithmetic expressions as a simple example.
3 + 4 is valid and so is
3 + 4 - 5, but
3 - + - 4 is not,
3 + 4 6. We can use EBNF to describe all the
possible legal arrangements.
That is expressed in DocBook like this:
<article xmlns='http://docbook.org/ns/docbook'> <title>Example productionset</title> <simplesect><title>EBNF Grammar</title> <productionset><title>Arithemetic Expressions</title> <production xml:id="ebnf.expression"> <lhs>Expression</lhs> <rhs><nonterminal def="#ebnf.arith">ArithExpression</nonterminal> | <nonterminal ...