Browsable BibTeX Query Language (BQL) Grammar

Grammar extracted by Vadim Zaytsev, see the Grammar Zoo entry for details: markup/textual/bibtex/bql/extracted
Source used for this grammar: Guillaume Hillairet, BibTeX Query Language, BQL.ecore, 2006/06/22

Summary

• Total 8 production rules with 9 top alternatives and 56 symbols.
• Vocabulary: 21 = 8 nonterminals + 2 terminals + 11 labels + 0 markers.
• Total 8 nonterminal symbols: 8 defined (LocatedElement, Query, Entry, Field, Predicate, Expression, String, Boolean), 0 root (—), 2 top (LocatedElement, Query), 0 bottom (—).
• Total 2 terminal symbols: 2 keywords ("true", "false"), 0 letters (—), 0 numerics (—), 0 signs (—).
• Total 11 labels: [entries], [predicates], [name] ², [type], [allFields], [fields], [predicate], [entry] ², [expression], [field], [value].

Syntax

LocatedElement ::=
	Entry

Query ::=
	[entries]::Entry+ [predicates]::Predicate+

Entry ::=
	[name]::String [type]::String [allFields]::Boolean [fields]::Field+ [predicate]::Predicate

Field ::=
	[name]::String [entry]::Entry

Predicate ::=
	[entry]::Entry [expression]::Expression+

Expression ::=
	[field]::String [value]::String

String ::=
	string

Boolean ::=
	"true"
	"false"

Maintained by Dr. Vadim Zaytsev a.k.a. @grammarware. Last updated in September 2015. [↑]