Help to express the condition in the PubUR system

Syntax rules

• Express the condition in terms of BibTeX types and fields.

• The condition is case insensitive.

• The operators & (AND), | (OR), ! (NOT) and the parentheses can be used.

• The name of a string field should be followed by the symbol ":" instead of "=".

• The blanks should be replaced by "#".

• The characters " * . + ? | $ ^ \ ( ) [ ] " have special meanings ( see 'regular expressions').
  To protect them, place them between "[" and "]".

Some examples

• condition on $type
  

• negative condition
  

  "not" can be replaced by "!".

• condition on YEAR and AUTHOR
  

  - "smith" and "Smith" are equivalent
  - "&" can also be written "and"

• condition on the existence of a field :
  

  all the references without PAGES field.

• condition on the TITLE field
  

• search for references in which Smith is the first author
  

• search for references whose title begins by 'C' and is followed by a blank
  

• search for references whose title includes 'C++' and is followed by a blank
  

ARTICLE

An article from a journal or magazine
Required: author, title, journal, year
Optional: volume,number,pages,month,note, key.

BOOK

A book with an explicit publisher
Required: author or editor, title, publisher, year
Optional: volume, series, address, edition, month, note, key.

INBOOK

A part of a book, which may be a chapter and/or a range of pages.
Required: author or editor, title, chapter and/or pages, publisher, year
Optional: volume, series, address, edition, month, note, key

INPROCEEDINGS

An article in a conference proceedings
Required: author, title, booktitle, year
Optional: editor, volume or number, series, pages, address, month, organization, publisher, note, key.

MISC

Use this type when nothing else seems appropriate.
Required: none
Optional: author, title, howpublished, month, year, note, key.

PHDTHESIS

A PhD thesis. (thèse de doctorat)
Required: author, title, school, year
Optional: type, address,month,note, key.

MASTERSTHESIS

A Master's thesis. (stages, dont DEA)
Required: author, title, school, year
Optional: type, address,month,note, key.

TECHREPORT

A report
Required: author, title, institution, year
Optional: type, number, address,month,note, key.

3.2   Filter conditions

• a comparison between two expressions, written as e₁ op e₂ ;
• a matching of a field name with respect to a regular expression, written as field : regexp ;
• a conjunction of two conditions, written as c₁ and c₂ (or c₁ & c₂) ;
• a disjunction of two conditions, written as c₁ or c₂ (or c₁ | c₂);
• a negation of a condition, written as not c (or ! c) ;
• a test of existence of a field, written as exists f (or ? f) where f is a field name ;

• a string constant, written either between double quotes or single quotes ;
• a integer constant ;
• a field name ;
• the special ident $key which corresponds to the key of an entry.
• the special ident $type which corresponds to the type of an entry (Article, InProceedings, etc.)

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.	matches any character except newline
[..]	character set; ranges are denoted with -, as in [a-z]; an initial ^, as in [^0-9], complements the set
^	matches the beginning of the string matched
$	matches the end of the string matched
\b	matches word boundaries
\	quotes special characters
regexp*	matches regexp zero, one or several times
regexp+	matches regexp one or several times
regexp?	matches regexp once or not at all
regexp1 \| regexp2	alternative between two regular expressions, this operator has low priority against *, + and ?
\( regexp \)	grouping regular expression

Table 1: Syntax of regular expressions

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Cond	®	Cond and Cond | Cond or Cond | not Cond | exists Id
Cond	®	Cond & Cond | Cond | Cond | ! Cond | ? Id
		| Expr   Comp   Expr | Expr : String | ( Cond )
Comp	®	= | > | < | >= | <= | <>
Expr	®	Id | String | Int | $key | $type
Id	®	[a-zA-Z]+
String	®	" ([^"\] | \" | \\ )* " | ' ([^'\] | \' | \\ )* '
Integer	®	[0-9]+

Table 2: Syntax of conditions

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