Example of usage¶
Lets say, that you have following MARC OAI document, which you need to process:
<record>
<metadata>
<oai_marc>
<fixfield id="LDR">-----nas-a22------a-4500</fixfield>
<fixfield id="FMT">SE</fixfield>
<fixfield id="001">nkc20150003059</fixfield>
<fixfield id="003">CZ-PrNK</fixfield>
<fixfield id="005">20150326133612.0</fixfield>
<fixfield id="007">ta</fixfield>
<fixfield id="008">150312c20149999xr--u---------0---b0cze--</fixfield>
<varfield id="BAS" i1=" " i2=" ">
<subfield label="a">01</subfield>
</varfield>
<varfield id="040" i1=" " i2=" ">
<subfield label="a">ABA001</subfield>
<subfield label="b">cze</subfield>
</varfield>
<varfield id="245" i1="0" i2="0">
<subfield label="a">Echa ... :</subfield>
<subfield label="b">[fórum pro literární vědu] /</subfield>
<subfield label="c">Jiří Brabec ... [et al.]</subfield>
</varfield>
<varfield id="246" i1="3" i2=" ">
<subfield label="a">Echa Institutu pro studium literatury ...</subfield>
</varfield>
<varfield id="260" i1=" " i2=" ">
<subfield label="a">Praha :</subfield>
<subfield label="b">Institut pro studium literatury,</subfield>
<subfield label="c">[2014?]-</subfield>
</varfield>
<varfield id="300" i1=" " i2=" ">
<subfield label="a">^^^ online zdroj</subfield>
</varfield>
<varfield id="362" i1="0" i2=" ">
<subfield label="a">2010/2011</subfield>
</varfield>
<varfield id="500" i1=" " i2=" ">
<subfield label="a">Součástí názvu je označení rozmezí let, od r. 2012 součástí názvu označení kalendářního roku vzniku příspěvků</subfield>
</varfield>
<varfield id="500" i1=" " i2=" ">
<subfield label="a">V některých formátech autoři neuvedeni</subfield>
</varfield>
<varfield id="500" i1=" " i2=" ">
<subfield label="a">Jednotlivé sv. mají ISBN</subfield>
</varfield>
<varfield id="500" i1=" " i2=" ">
<subfield label="a">Popsáno podle: 2010/2011</subfield>
</varfield>
<varfield id="700" i1="1" i2=" ">
<subfield label="a">Brabec, Jiří</subfield>
<subfield label="4">aut</subfield>
</varfield>
<varfield id="856" i1="4" i2="0">
<subfield label="u">http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011/echa-2010-2011-eva-jelinkova-michael-spirit-eds.pdf</subfield>
<subfield label="z">2010-2011</subfield>
<subfield label="4">N</subfield>
</varfield>
<varfield id="856" i1="4" i2="0">
<subfield label="u">http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011-1/echa-2010-2011-eva-jelinkova-michael-spirit-eds.epub</subfield>
<subfield label="z">2010-2011</subfield>
<subfield label="4">N</subfield>
</varfield>
<varfield id="856" i1="4" i2="0">
<subfield label="u">http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011-1/echa-2010-2011-eva-jelinkova-michael-spirit-eds.mobi</subfield>
<subfield label="z">201-2011</subfield>
<subfield label="4">N</subfield>
</varfield>
<varfield id="856" i1="4" i2="0">
<subfield label="u">http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2012-1/echa-2012-eva-jelinkova-michael-spirit-eds.mobi</subfield>
<subfield label="z">2012</subfield>
<subfield label="4">N</subfield>
</varfield>
<varfield id="856" i1="4" i2="0">
<subfield label="u">http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011/echa-2013-eva-jelinkova-michael-spirit-eds.epub</subfield>
<subfield label="z">2013</subfield>
<subfield label="4">N</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-10-6</subfield>
<subfield label="q">(2010/2011 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">pdf)</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-09-0</subfield>
<subfield label="q">(2010/2011 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">Mobipocket)</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-08-3</subfield>
<subfield label="q">(2010/2011 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">ePub)</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-06-9</subfield>
<subfield label="q">(2012 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">Mobipocket)</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-05-2</subfield>
<subfield label="q">(2012 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">ePub)</subfield>
<subfield label="z">978-80-87899-07-6</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-07-6</subfield>
<subfield label="q">(2012 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">pdf)</subfield>
<subfield label="z">978-80-87899-05-2</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-02-1</subfield>
<subfield label="q">(2013 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">ePub)</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-03-8</subfield>
<subfield label="q">(2013 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">Mobipocket)</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-04-5</subfield>
<subfield label="q">(2013 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">pdf)</subfield>
</varfield>
<varfield id="910" i1=" " i2=" ">
<subfield label="a">ABA001</subfield>
<subfield label="s">2010/2011, 2012-2013-</subfield>
</varfield>
<varfield id="998" i1=" " i2=" ">
<subfield label="a">http://aleph.nkp.cz/F/?func=direct&doc_number=000003059&local_base=CZE-DEP</subfield>
</varfield>
<varfield id="PSP" i1=" " i2=" ">
<subfield label="a">BK</subfield>
</varfield>
<varfield id="IST" i1="1" i2=" ">
<subfield label="a">jp20150312</subfield>
<subfield label="b">kola</subfield>
</varfield>
</oai_marc>
</metadata>
</record>
This document is saved at tests/data/aleph_epub.xml. To parse this document, you just open it and create MARCXMLRecord object from the string:
from marcxml_parser import MARCXMLRecord
with open("tests/data/aleph_epub.xml") as f:
rec = MARCXMLRecord(f.read())
Lowlevel access¶
All the controlfields and datafields were parsed into controlfields and datafields:
>>> rec.controlfields
OrderedDict([
('LDR', '-----nas-a22------a-4500'),
('FMT', 'SE'),
('001', 'nkc20150003059'),
('003', 'CZ-PrNK'),
('005', '20150326133612.0'),
('007', 'ta'),
('008', '150312c20149999xr--u---------0---b0cze--'),
])
>>> rec.datafields
OrderedDict([
('BAS', [OrderedDict([('i1', ' '), ('i2', ' '), ('a', ['01'])])]),
('040', [OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['ABA001']),
('b', ['cze'])
])]),
('245', [OrderedDict([
('i1', '0'),
('i2', '0'),
('a', ['Echa ... :']),
('b', ['[f\xc3\xb3rum pro liter\xc3\xa1rn\xc3\xad v\xc4\x9bdu] /']),
('c', ['Ji\xc5\x99\xc3\xad Brabec ... [et al.]'])
])]),
('246', [OrderedDict([
('i1', '3'),
('i2', ' '),
('a', ['Echa Institutu pro studium literatury ...'])
])]),
('260', [OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['Praha :']),
('b', ['Institut pro studium literatury,']),
('c', ['[2014?]-'])
])]),
('300', [OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['^^^ online zdroj'])
])]),
('362', [OrderedDict([
('i1', '0'),
('i2', ' '),
('a', ['2010/2011'])
])]),
('500',
[OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['Sou\xc4\x8d\xc3\xa1st\xc3\xad n\xc3\xa1zvu je ozna\xc4\x8den\xc3\xad rozmez\xc3\xad let, od r. 2012 sou\xc4\x8d\xc3\xa1st\xc3\xad n\xc3\xa1zvu ozna\xc4\x8den\xc3\xad kalend\xc3\xa1\xc5\x99n\xc3\xadho roku vzniku p\xc5\x99\xc3\xadsp\xc4\x9bvk\xc5\xaf'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['V n\xc4\x9bkter\xc3\xbdch form\xc3\xa1tech auto\xc5\x99i neuvedeni'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['Jednotliv\xc3\xa9 sv. maj\xc3\xad ISBN'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['Pops\xc3\xa1no podle: 2010/2011'])
])
]),
('700', [OrderedDict([
('i1', '1'),
('i2', ' '),
('a', ['Brabec, Ji\xc5\x99\xc3\xad']),
('4', ['aut'])
])]),
('856', [
OrderedDict([
('i1', '4'),
('i2', '0'),
('u', ['http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011/echa-2010-2011-eva-jelinkova-michael-spirit-eds.pdf']),
('z', ['2010-2011']),
('4', ['N'])
]),
OrderedDict([
('i1', '4'),
('i2', '0'),
('u', ['http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011-1/echa-2010-2011-eva-jelinkova-michael-spirit-eds.epub']),
('z', ['2010-2011']),
('4', ['N'])
]),
OrderedDict([
('i1', '4'),
('i2', '0'),
('u', ['http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011-1/echa-2010-2011-eva-jelinkova-michael-spirit-eds.mobi']),
('z', ['201-2011']),
('4', ['N'])
]),
OrderedDict([
('i1', '4'),
('i2', '0'),
('u', ['http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2012-1/echa-2012-eva-jelinkova-michael-spirit-eds.mobi']),
('z', ['2012']),
('4', ['N'])
]),
OrderedDict([
('i1', '4'),
('i2', '0'),
('u', ['http://edeposit-test.nkp.cz/producents/nakladatelstvi-delta/epublications/echa-2010-2011/echa-2013-eva-jelinkova-michael-spirit-eds.epub']),
('z', ['2013']),
('4', ['N'])
])
]),
('902', [
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-10-6']),
('q', ['(2010/2011 :', 'online :', 'pdf)'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-09-0']),
('q', ['(2010/2011 :', 'online :', 'Mobipocket)'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a',"['978-80-87899-08-3']),
('q', ['(2010/2011 :', 'online :', 'ePub)'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-06-9']),
('q', ['(2012 :', 'online :', 'Mobipocket)'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-05-2']),
('q', ['(2012 :', 'online :' , 'ePub)']),
('z', ['978-80-87899-07-6'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-07-6']),
('q', ['(2012 :', 'online :', 'pdf)']),
('z', ['978-80-87899-05-2'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-02-1']),
('q', ['(2013 :', 'online :' , 'ePub)'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-03-8']),
('q', ['(2013 :', 'online :' , 'Mobipocket)'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-04-5']),
('q', ['(2013 :', 'online :' , 'pdf)'])
]),
]),
('910', [OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['ABA001']),
('s', ['2010/2011, 2012-2013-'])])
]),
('998', [OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['http://aleph.nkp.cz/F/?func=direct&doc_number=000003059&local_base=CZE-DEP'])
])]),
('PSP', [OrderedDict([('i1', ' '), ('i2', ' '), ('a', ['BK'])])]),
('IST', [OrderedDict([
('i1', '1'),
('i2', ' '),
('a', ['jp20150312']),
('b', ['kola'])
])]),
])
As you can see, this format is probably too much lowlevel, than you would ever want to use, but it demonstrates one important aspect of the parser; All values are parsed to (ordered) dicts.
That means, that XML:
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-05-2</subfield>
<subfield label="q">(2012 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">ePub)</subfield>
<subfield label="z">978-80-87899-07-6</subfield>
</varfield>
<varfield id="902" i1=" " i2=" ">
<subfield label="a">978-80-87899-07-6</subfield>
<subfield label="q">(2012 :</subfield>
<subfield label="q">online :</subfield>
<subfield label="q">pdf)</subfield>
<subfield label="z">978-80-87899-05-2</subfield>
</varfield>
Is parsed to:
OrderedDict([
('902', [
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-05-2']),
('q', ['(2012 :', 'online :' , 'ePub)']),
('z', ['978-80-87899-07-6'])
]),
OrderedDict([
('i1', ' '),
('i2', ' '),
('a', ['978-80-87899-07-6']),
('q', ['(2012 :', 'online :', 'pdf)']),
('z', ['978-80-87899-05-2'])
]),
]),
])
Which is equivalent to following code (without ordered dicts for simplicity):
{
"902": [
{
'i1': ' ',
'i2': ' ',
'a': ['978-80-87899-05-2'],
'q': ['(2012 :', 'online :' , 'ePub)'],
'z': ['978-80-87899-07-6']
},
{
'i1': ' ',
'i2': ' ',
'a': ['978-80-87899-07-6'],
'q': ['(2012 :', 'online :', 'pdf)'],
'z': ['978-80-87899-05-2']
}
]
}
Notice the q sub-record, which was three times in original XML and now is stored as list.
This is the reason why most of the getters returns lists and not just simply values - the nature of MARC records are lists.
Getters¶
To access values inside controlfields and datafields, you can use direct access to internal dict structure:
>>> rec.datafields["902"][4]["q"]
['(2012 :', 'online :', 'ePub)']
but I can highly recommend to use highlevel getters:
>>> rec.get_subfields("902", "q")
[
'(2010/2011 :',
'online :',
'pdf)',
'(2010/2011 :',
'online :',
'Mobipocket)',
'(2010/2011 :',
'online :',
'ePub)',
'(2012 :',
'online :',
'Mobipocket)',
'(2012 :',
'online :',
'ePub)',
'(2012 :',
'online :',
'pdf)',
'(2013 :',
'online :',
'ePub)',
'(2013 :',
'online :',
'Mobipocket)',
'(2013 :',
'online :',
'pdf)',
]
Whoa. What happened? There weren’t specified any more arguments to get_subfields(), so all the 902q subrecords were returned.
Lets look at the first returned item:
>>> rec.get_subfields("902", "q")[0]
'(2010/2011 :'
It looks like a string. But in fact, it is MARCSubrecord instance:
>>> type(rec.get_subfields("902", "q")[0])
<class 'marcxml_parser.structures.marcsubrecord.MARCSubrecord'>
That means, that it has more context, than ordinary string:
>>> r = rec.get_subfields("902", "q")[0]
>>> r.val
'(2010/2011 :'
>>> r.i1
' '
>>> r.i2
' '
>>> r.other_subfields
OrderedDict([('i1', ' '), ('i2', ' '), ('a', ['978-80-87899-10-6']), ('q', ['(2010/2011 :', 'online :', 'pdf)'])])
Highlevel getters¶
Here is the list of all highlevel getters are defined by MARCXMLQuery:
get_name()get_subname()get_price()get_part()get_part_name()get_publisher()get_pub_date()get_pub_order()get_pub_place()get_format()get_authors()get_corporations()get_distributors()get_ISBNs()get_binding()get_originals()
You will probably like the indexing operator, which can be used as shortcut for
rec.get_subfields calls, for example rec.get_subfields("500", "a") can be shortened to:
>>> rec["500a"]
[
'Sou\xc4\x8d\xc3\xa1st\xc3\xad n\xc3\xa1zvu je ...', # shortened
'V n\xc4\x9bkter\xc3\xbdch form\xc3\xa1tech auto\xc5\x99i neuvedeni',
'Jednotliv\xc3\xa9 sv. maj\xc3\xad ISBN',
'Pops\xc3\xa1no podle: 2010/2011'
]
>>> rec["001"]
'nkc20150003059
or with i1/i2 arguments:
>>> rec["500a 9"] # equivalent to rec.get_subfields("500", "a", i1=" ", i2="9")
[]
(nothing was returned, because there isn’t i1 == `` `` and i2 == 9)
>>> rec["902q "]
[
'Sou\xc4\x8d\xc3\xa1st\xc3\xad n\xc3\xa1zvu je ...', # shortened
'V n\xc4\x9bkter\xc3\xbdch form\xc3\xa1tech auto\xc5\x99i neuvedeni',
'Jednotliv\xc3\xa9 sv. maj\xc3\xad ISBN',
'Pops\xc3\xa1no podle: 2010/2011'
]