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textmarc2xmlmarc.py
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textmarc2xmlmarc.py
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# -*- coding: utf-8 -*-
##
## This file is part of CDS Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 CERN.
##
## CDS Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## CDS Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with CDS Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
textmarc2xmlmarc utility.
"""
__version__ = ""
import fileinput
import getopt
import string
import sys
import re
import os.path
class Field:
"A class to hold information on bibliographic field and its value."
def __init__(self, value_as_string=""):
"Creates field instance from a string of the form '$$aElis$2editor'."
self.value = {}
if value_as_string:
s = value_as_string
if s[0:2] != '$$': # if does not start by subfield, add artificial beginning subfield
s = '$$ '+ s
for chunk in string.split(s, '$$'):
if chunk:
aleph_spread = alephsplit(chunk[1:])
if len(aleph_spread) > 1:
self.add('0',aleph_spread[1])
self.add(chunk[0], aleph_spread[0]) # add subfield
# self.add(chunk[0], chunk[1:])
def has_subfield(self, subfield_code):
"Does the field contain this subfield?"
if self.value.has_key(subfield_code):
return 1
else:
return 0
def get_subfield(self, subfield_code=''):
"Returns the value of a given subfield."
if self.value.has_key(subfield_code):
return self.value[subfield_code][0] # return first subfield
else:
return ""
def add(self, subfield_code, subfield_value):
"Adds subfield to the field."
c = string.strip(subfield_code)
v = string.strip(subfield_value)
if v: # let us disregard empty subfields
if self.value.has_key(c):
self.value[c].append(v)
else:
self.value[c] = [v]
def display(self,field_type = "datafield"):
"Displays field in xml format."
keys = self.value.keys()
keys.sort()
out = ""
for subfield_code in keys:
for subfield_value in self.value[subfield_code]:
subfield_value = encode_for_xml(subfield_value)
if subfield_value:
if out != "":
out = out + "\n"
if field_type == "datafield":
out = out + " <subfield code=\"%s\">%s</subfield>" % (subfield_code, subfield_value)
else:
out = out + "%s" % subfield_value
return out
class Record:
"A class to hold information on bibliographic record."
def __init__(self, sysno="0"):
"Creates record instance."
self.sysno = string.strip(sysno)
self.field = {}
def add(self, field_tag, field_value):
"Adds the field to the record."
t = string.strip(field_tag)
if self.field.has_key(t):
self.field[t].append(field_value)
else:
self.field[t] = [field_value]
def has_basenb(self, bases):
"Tests whether one of record's BASE values is among one of the values passed in argument tuple."
if self.field.has_key('BASE'):
for f in self.field['BASE']:
try:
b = int(f.get_subfield()) # get BASE number
if b in bases:
return 1
except:
pass
if self.field.has_key('BA'):
for f in self.field['BA']:
try:
b = int(f.get_subfield()) # get BASE number
if b in bases:
return 1
except:
pass
if self.field.has_key('BAS'):
for f in self.field['BAS']:
try:
b = int(f.get_subfield('a')) # get BASE number
if b in bases:
return 1
except:
pass
if self.field.has_key('960'):
for f in self.field['960']:
try:
b = int(f.get_subfield('a')) # get BASE number
if b in bases:
return 1
except:
pass
return 0
def display(self, filehandle):
"Displays record in the xml format."
## display record header
print '<record>'
print ' <controlfield tag="001">%d</controlfield>' % int(self.sysno)
## display record body
keys = self.field.keys()
keys.sort()
for field_tag in keys:
for field_instance in self.field[field_tag]:
if field_tag[0] >= '0' and field_tag[0] <= '9': # are we using numbers for field tag name?
tag = field_tag[0:3] # yes, so the first three chars constitute MARC-21 tag name
i1 = field_tag[3:4] # next char is 1st indicator
if i1 == "_" or i1 == " ":
i1 = " "
i2 = field_tag[4:5] # next char is 2nd indicator
if i2 == "_" or i2 == " ":
i2 = " "
else:
tag = field_tag
i1 = " "
i2 = " "
if tag[:2] == "00":
field_type = "controlfield"
else:
field_type = "datafield"
instance_to_print = field_instance.display(field_type)
if instance_to_print:
if tag[:2] != "00":
print " <datafield tag=\"%s\" ind1=\"%s\" ind2=\"%s\">" % (tag, i1, i2)
print instance_to_print
print " </datafield>"
else:
if not (tag == "001" and int(self.sysno) == int(instance_to_print)):
print " <controlfield tag=\"%s\">%s</controlfield>" % (tag,instance_to_print)
## display record footer
print "</record>"
def log_on_exec(command):
"Execute command and create record in log file"
return os.system(command)
def alephsplit(value):
"splits value on <<foo=bar>> and returns list with two elements (foo and bar)"
out = []
y = re.split("(<<.*?>>)",value)
if y!=None:
outf1 = ""
outf0 = ""
count = 0
for item in y:
if (re.match("<<.*?>>",item) == None):
outf1 = outf1 + item
outf0 = outf0 + item
else:
if re.search("=",item):
z = re.search("<<.*?=",item)
if z!= None:
outf1 = outf1 + z.group()[2:-1]
z = re.search("=.*?>>",item)
if z!= None:
outf0 = outf0 + z.group()[1:-2]
count = count + 1
else:
z = re.search("<<.+>>",item)
if z!=None:
outf1 = outf1 + z.group()[2:-2]
out.append(outf1)
if count > 0:
out.append(outf0)
else:
out.append("")
return out
def clean(x,values):
"Empty when already in list of values"
for v in values:
if (v == x):
x = ""
return x
def transform_record(rec, errors):
"Transforms record from MARC-21 format to XML format."
out = Record(rec.sysno)
is_deleted = 0
original_collids = []
for tag in rec.field.keys():
if tag == "BAS":
for field_instance in rec.field[tag]:
out.add("960", field_instance)
elif tag == "DEL":
is_deleted = 1
elif tag == "591":
pass # we drop 591 field that is of secret internal note nature (TS 20070123)
elif tag == "CAT" or tag == "961":
first_CAT = ""
last_CAT = ""
for field_instance in rec.field[tag]:
if first_CAT == "":
first_CAT = field_instance
last_CAT = field_instance
outf = Field()
if first_CAT.has_subfield('x'):
outf.add('x',string.replace(first_CAT.get_subfield('x'),'-',''))
elif first_CAT.has_subfield('c'):
outf.add('x',string.replace(first_CAT.get_subfield('c'),'-',''))
if last_CAT.has_subfield('c'):
outf.add('c',string.replace(last_CAT.get_subfield('c'),'-',''))
if last_CAT.has_subfield('l'):
outf.add('l',last_CAT.get_subfield('l'))
if last_CAT.has_subfield('h'):
outf.add('h',last_CAT.get_subfield('h'))
out.add('961', outf)
elif tag == "LKR":
for field_instance in rec.field[tag]:
out.add("962", field_instance)
elif tag == "OWN":
for field_instance in rec.field[tag]:
out.add("963", field_instance)
elif (tag == "520" or tag == "590"):
topfield = 1000
outfa = Field()
outfb = Field()
listvaluesa = {}
listvaluesb = {}
listordersa = []
listordersb = []
valuea = ''
valueb = ''
for field_instance in rec.field[tag]:
if field_instance.has_subfield('b'):
partial = field_instance.get_subfield('b')
if field_instance.has_subfield('9') and field_instance.get_subfield('9') != "":
order = int(field_instance.get_subfield('9'))
else:
order = topfield
topfield = topfield + 1
listordersb.append(order)
listvaluesb[order]=partial
elif field_instance.has_subfield('a'):
partial = field_instance.get_subfield('a')
if field_instance.has_subfield('9') and field_instance.get_subfield('9').isdigit():
order = int(field_instance.get_subfield('9'))
else:
order = topfield
topfield = topfield + 1
listordersa.append(order)
listvaluesa[order]=partial
else:
out.add(tag, field_instance)
listordersa.sort()
for order in listordersa:
valuea = valuea + " " + listvaluesa[order]
if valuea != '':
outfa.add('a',valuea)
out.add(tag, outfa)
listordersb.sort()
for order in listordersb:
valueb = valueb + " " + listvaluesb[order]
if valueb != '':
outfb.add('b',valueb)
out.add(tag, outfb)
elif tag == "980":
for field_instance in rec.field[tag]:
original_collids.append(field_instance)
elif tag!="FMT" and tag!="LDR" and tag!="008" and tag!="OWN" and tag!="0248" and tag!="---" and tag[0] in string.digits and tag[1] in string.digits and tag[2] in string.digits:
for field_instance in rec.field[tag]:
out.add(tag, field_instance)
#deleted collection field
if is_deleted:
outf = Field()
outf.add('c','DELETED')
out.add('980',outf)
return out
def transform_file(filename):
"Reads ALEPH 500 sequential data file and transforms them into XML format."
record_no = 0
filehandle = ""
errors = {} # dict that holds 'bad' fields as keys and list of sysnos for which they occurred as values
record_current = Record() # will hold current bibliographic record as we read through input file
sysno_old, field_old, value_old = None, None, None # will hold values from previous line
## go trough all the input file
for line in fileinput.input(filename):
if re.sub("\s","",line) != "":
# parse the input line with MARC sequential format
sysno, field, value = line[0:9], line[10:15], line[16:]
if field[0] == " " or field[1] == " " or field[2] == " ":
text = "\nRecord %s: Error in field definition %s\n" % (sysno,field)
if field[0] == " ":
field = string.replace(field," ","0",1)
if field[1] == " ":
field = string.replace(field," ","0",1)
if field[2] == " ":
field = string.replace(field," ","0",1)
sys.stderr.write(text)
raise
sysno, field, value = string.strip(sysno), string.strip(field), string.strip(value)
if sysno == record_current.sysno: # we are in the same bibliographic record
record_current.add(field_old, Field(value_old))
field_old, value_old = field, value
else: # end of current record found, so transform it
record_no = record_no + 1 # count records
if field_old and value_old: # add previous line
record_current.add(field_old, Field(value_old))
record_tmp = transform_record(record_current, errors)
if record_tmp.sysno != "0":
record_tmp.display(filehandle)
record_current = Record(sysno) # set up a new current record
field_old, value_old = field, value
## after all the input lines have been read, display last record
record_current.add(field_old, Field(value_old))
record_tmp = transform_record(record_current, errors)
if record_tmp.sysno != "0":
record_tmp.display(filehandle)
## display eventual errors
errors_keys = errors.keys(); errors_keys.sort()
for t in errors_keys:
sys.stderr.write("\n\nUnknown tag %s occurred for the following SYSNOs:\n " % t)
nbchars = 5
for s in errors[t]:
sys.stderr.write("%s " % s)
nbchars = nbchars + len(s)
if nbchars >= 72:
sys.stderr.write("\n ")
nbchars = 5
sys.stderr.write("\n")
def usage(code, msg=''):
"Prints usage for this module."
sys.stderr.write("%s\n" % __version__)
if msg:
sys.stderr.write("Error: %s.\n" % msg)
sys.stderr.write("Usage: %s file.seq ...].\n" % sys.argv[0])
sys.stderr.write("Options: \n")
sys.stderr.write(" -h, --help print this help\n")
sys.exit(code)
def encode_for_xml(s):
"Encode special chars in string so that it would be XML-compliant."
s = string.replace(s, '&', '&amp;')
s = string.replace(s, '<', '&lt;')
s = re.sub("[\x00-\x19\x7F\x1C\x1D]","",s) # remove ctrl characters
# s = unicode(s,'latin1','ignore').encode('utf-8','replace')
return s
def main():
"Main function that does conversion from ALEPH 500 into XML."
## read command-line options
try:
opts, dummy_args = getopt.getopt(sys.argv[1:], "h", ['help'])
except getopt.error, msg:
usage(1, msg)
help_p = 0 # default is not to print help
## guess about desired output format
for opt, arg in opts:
if opt in ('-h', '--help'):
help_p = 1
## guess about possible input files
files = []
for arg in sys.argv[1:]:
if arg[0] != "-" and len(arg)>3:
files.append(arg)
## process all the input, finally
if help_p == 1:
usage(0)
else:
print '<?xml version="1.0" encoding="UTF-8"?>'
print '<collection xmlns="http://www.loc.gov/MARC21/slim">'
if files:
for afile in files:
transform_file(afile)
else:
transform_file("-")
print '</collection>'
sys.stderr.close()
### okay, here we go:
if __name__ == '__main__':
main()

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