On Mon, Feb 9, 2009 at 12:51 PM, Dinesh B Vadhia
<dineshbvad...@hotmail.com> wrote:
> Kent /Emmanuel
>
> Below are the results using the PLY parser and Regex versions on the
> attached 'sierra' data which I think covers the common formats. Here are
> some 'fully unparsed" citations that were missed by the programs:
>
> Smith v. Wisconsin Dept. of Agriculture, 23 F.3d 1134, 1141 (7th Cir.1994)
>
> Indemnified Capital Investments, S.A. v. R.J. O'Brien & Assoc., Inc., 12
> F.3d 1406, 1409 (7th Cir.1993).
>
> Hunt v. Washington Apple Advertising Commn., 432 U.S. 333, 343, 97 S.Ct.
> 2434, 2441, 53 L.Ed.2d 383 (1977)
>
> Idaho Conservation League v. Mumma, 956 F.2d 1508, 1517-18 (9th Cir.1992)
A few issues here:
S.A. - this is hard, to allow this while filtering out sentences
R.J. O'Brien, etc. - Loosening up the rules for the second name can allow these
1517-18 - allow page ranges
The name issues are getting to be too much for me. Attached is a PLY
version that just pulls out the citation without the name; at one
point you indicated that would work for you.
Kent
# Parser for legal citations, PLY version
# This version doesn't parse the names
from ply import lex, yacc
debug = 0
text = """Indemnified Capital Investments, S.A. v. R.J. O'Brien & Assoc., Inc., 12 F.3d 1406, 1409 (7th Cir.1993).
Hunt v. Washington Apple Advertising Commn., 432 U.S. 333, 343, 97 S.Ct. 2434, 2441, 53 L.Ed.2d 383 (1977)
Smith v. Wisconsin Dept. of Agriculture, 23 F.3d 1134, 1141 (7th Cir.1994)
Idaho Conservation League v. Mumma, 956 F.2d 1508, 1517-18 (9th Cir.1992)
NFMA, NEPA, or MUSYA. Sierra Club v. Marita, 843 F.Supp. 1526 (E.D.Wis.1994) ("Nicolet ").
Page 500 Carter v. Jury Commission of Greene County, 396 U.S. 320, 90 S.Ct. 518, 24 L.Ed.2d 549 (1970);
Lathe Turner v. Fouche, 396 U.S. 346, 90 S.Ct. 532, 24 L.Ed.2d 567 (1970);
White v. Crook, 251 F.Supp. 401 (DCMD Ala.1966).
Moreover, the Court has also recognized that the exclusion of a discernible class from jury service
injures not only those defendants who belong to the excluded class,
but other defendants as well, in that it destroys the possibility
that the jury will reflect a representative cross section of the community.
In John Doggone Williams v. Florida, 399 U.S. 78, 90 S.Ct. 1893, 234, 26 L.Ed.2d 446 (1970),
we sought to delineate some of the essential features of the jury that is guaranteed,
in certain circumstances, by the Sixth Amendment. We concluded that it comprehends,
inter alia, 'a fair possibility for obtaining a representative cross-section of the community.'
399 U.S., at 100, 90 S.Ct., at 1906.9 Thus if the Sixth Amendment were applicable here,
and petitioner were challenging a post-Duncan petit jury,
he would clearly have standing to challenge the systematic exclusion of any identifiable group from jury service."""
# Lexical tokens
tokens = (
'NUMBER',
'MIXED',
'YEAR',
)
literals = ",()-"
# Regular expression rules for simple tokens
t_NUMBER = r'\d+'
t_MIXED = r'[A-Za-z][A-Za-z.0-9\']+' # References and names after the first work
t_YEAR = r'\([^)]+\)' # Note: "year" can contain multiple words and non-numeric
# A string containing ignored characters (spaces and tabs)
t_ignore = ' \t\r\n'
# Error handling rule
def t_error(t):
t.lexer.skip(1)
# Build the lexer
lexer = lex.lex()
def test_lexer(data):
lexer.input(data)
# Tokenize
while True:
tok = lexer.token()
if not tok: break # No more input
print tok
# Parser productions
def p_Page(p):
'''page : NUMBER
| NUMBER '-' NUMBER'''
if len(p) == 2:
p[0] = p[1]
else:
p[0] = p[1] + p[2] + p[3]
def p_Reference(p):
'''reference : NUMBER MIXED page'''
p[0] = '%s %s %s' % (p[1], p[2], p[3])
def p_Reference_List(p):
'''reference_list : reference
| reference_list ',' page
| reference_list ',' reference
| reference_list ',' page ',' reference'''
if len(p) == 2:
p[0] = [p[1]] # single reference
elif len(p) == 4:
if p.slice[3].type == 'reference':
p[0] = p[1] + [p[3]] # append new reference
else:
p[1][-1] += ', %s' % p[3] # append page number
p[0] = p[1]
else:
# page number and reference
p[1][-1] += ', %s' % p[3] # append page number
p[0] = p[1] + [p[5]] # append new reference
def p_Citation(p):
'''citation : reference_list YEAR error'''
for reference in p[1]:
print '%s %s' % (reference, p[2])
print
def p_Citations(p):
'''citations : citation
| citations citation'''
pass
def p_error(p):
pass
start = 'citations'
# Build the parser
parser = yacc.yacc()
if __name__ == '__main__':
parser.parse(text, debug=debug)
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