public Class RepecNepImporter

NEPMessage:
      MessageSection NEPMessage
      MessageSection

MessageSection:
      OverviewMessageSection
      OtherMessageSection

# we skip the overview
OverviewMessageSection:
      'In this issue we have: ' SectionSeparator OtherStuff

OtherMessageSection:
      SectionSeparator  OtherMessageSectionContent

# we skip other stuff and read only full working paper references
OtherMessageSectionContent:
      WorkingPaper EmptyLine OtherMessageSectionContent
      OtherStuff EmptyLine OtherMessageSectionContent
      ''

OtherStuff:
      NonEmptyLine OtherStuff
      NonEmptyLine

NonEmptyLine:
      a non-empty String that does not start with a number followed by a '.'

# working papers are recognized by a number followed by a '.'
# in a non-overview section
WorkingPaper:
      Number'.' WhiteSpace TitleString EmptyLine Authors EmptyLine Abstract AdditionalFields
      Number'.' WhiteSpace TitleString AdditionalFields Abstract AdditionalFields

TitleString:
      a String that may span several lines and should be joined

# there must be at least one author
Authors:
      Author '\n' Authors
      Author '\n'

# optionally, an institution is given for an author
Author:
      AuthorName
      AuthorName '(' Institution ')'

# there are no rules about the name, it may be firstname lastname or lastname, firstname or anything else
AuthorName:
      a non-empty String without '(' or ')' characters, not spanning more that one line

Institution:
      a non-empty String that may span several lines

Abstract:
      a (possibly empty) String that may span several lines

AdditionalFields:
      AdditionalField '\n' AdditionalFields
      EmptyLine AdditionalFields
      ''

AdditionalField:
      'Keywords:' KeywordList
      'URL:' non-empty String
      'Date:' DateString
      'JEL:' JelClassificationList
      'By': Authors

KeywordList:
       Keyword ',' KeywordList
       Keyword ';' KeywordList
       Keyword

Keyword:
       non-empty String that does not contain ',' (may contain whitespace)

# if no date is given, the current year as given by the system clock is assumed
DateString:
       'yyyy-MM-dd'
       'yyyy-MM'
       'yyyy'

JelClassificationList:
       JelClassification JelClassificationList
       JelClassification

# the JEL Classifications are set into a new BIBTEX-field 'jel'
# they will appear if you add it as a field to one of the BIBTex Entry sections
JelClassification:
       one of the allowed classes, see http://ideas.repec.org/j/

SectionSeparator:
      '\n-----------------------------'