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bibformat_utils.py
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R3600 invenio-infoscience
bibformat_utils.py
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# -*- coding: utf-8 -*-
##
## This file is part of CDS Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 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.
"""
Utilities for special formatting of records.
API functions: highlight, get_contextual_content, encode_for_xml
Used mainly by BibFormat elements.
Depends on search_engine.py for record_exists()
FIXME: currently copies record_exists() code from search engine. Refactor later.
"""
__revision__
=
"$Id$"
import
re
import
zlib
from
invenio.config
import
\
CFG_OAI_ID_FIELD
from
invenio.dbquery
import
run_sql
from
invenio.urlutils
import
string_to_numeric_char_reference
from
invenio.textutils
import
encode_for_xml
def
highlight
(
text
,
keywords
=
None
,
prefix_tag
=
'<strong>'
,
suffix_tag
=
"</strong>"
):
"""
Returns text with all words highlighted with given tags (this
function places 'prefix_tag' and 'suffix_tag' before and after
words from 'keywords' in 'text').
for example set prefix_tag='<b style="color: black; background-color: rgb(255, 255, 102);">' and suffix_tag="</b>"
@param text the text to modify
@param keywords a list of string
@return highlighted text
"""
if
not
keywords
:
return
text
#FIXME decide if non english accentuated char should be desaccentuaded
def
replace_highlight
(
match
):
""" replace match.group() by prefix_tag + match.group() + suffix_tag"""
return
prefix_tag
+
match
.
group
()
+
suffix_tag
#Build a pattern of the kind keyword1 | keyword2 | keyword3
pattern
=
'|'
.
join
(
keywords
)
compiled_pattern
=
re
.
compile
(
pattern
,
re
.
IGNORECASE
)
#Replace and return keywords with prefix+keyword+suffix
return
compiled_pattern
.
sub
(
replace_highlight
,
text
)
def
get_contextual_content
(
text
,
keywords
,
max_lines
=
2
):
"""
Returns some lines from a text contextually to the keywords in
'keywords_string'
@param text the text from which we want to get contextual content
@param keywords a list of keyword strings ("the context")
@param max_lines the maximum number of line to return from the record
@return a string
"""
def
grade_line
(
text_line
,
keywords
):
"""
Grades a line according to keywords.
grade = number of keywords in the line
"""
grade
=
0
for
keyword
in
keywords
:
grade
+=
text_line
.
upper
()
.
count
(
keyword
.
upper
())
return
grade
#Grade each line according to the keywords
lines
=
text
.
split
(
'.'
)
#print 'lines: ',lines
weights
=
[
grade_line
(
line
,
keywords
)
for
line
in
lines
]
#print 'line weights: ', weights
def
grade_region
(
lines_weight
):
"""
Grades a region. A region is a set of consecutive lines.
grade = sum of weights of the line composing the region
"""
grade
=
0
for
weight
in
lines_weight
:
grade
+=
weight
return
grade
if
max_lines
>
1
:
region_weights
=
[]
for
index_weight
in
range
(
len
(
weights
)
-
max_lines
+
1
):
region_weights
.
append
(
grade_region
(
weights
[
index_weight
:(
index_weight
+
max_lines
)]))
weights
=
region_weights
#print 'region weights: ',weights
#Returns line with maximal weight, and (max_lines - 1) following lines.
index_with_highest_weight
=
0
highest_weight
=
0
i
=
0
for
weight
in
weights
:
if
weight
>
highest_weight
:
index_with_highest_weight
=
i
highest_weight
=
weight
i
+=
1
#print 'highest weight', highest_weight
if
index_with_highest_weight
+
max_lines
>
len
(
lines
):
return
lines
[
index_with_highest_weight
:]
else
:
return
lines
[
index_with_highest_weight
:
index_with_highest_weight
+
max_lines
]
def
record_get_xml
(
recID
,
format
=
'xm'
,
decompress
=
zlib
.
decompress
,
on_the_fly
=
False
):
"""
Returns an XML string of the record given by recID.
The function builds the XML directly from the database,
without using the standard formatting process.
'format' allows to define the flavour of XML:
- 'xm' for standard XML
- 'marcxml' for MARC XML
- 'oai_dc' for OAI Dublin Core
- 'xd' for XML Dublin Core
If record does not exist, returns empty string.
@param recID the id of the record to retrieve
@param on_the_fly if False, try to fetch precreated one in database
@return the xml string of the record
"""
from
invenio.search_engine
import
record_exists
def
get_fieldvalues
(
recID
,
tag
):
"""Return list of field values for field TAG inside record RECID."""
out
=
[]
if
tag
==
"001___"
:
# we have asked for recID that is not stored in bibXXx tables
out
.
append
(
str
(
recID
))
else
:
# we are going to look inside bibXXx tables
digit
=
tag
[
0
:
2
]
bx
=
"bib
%s
x"
%
digit
bibx
=
"bibrec_bib
%s
x"
%
digit
query
=
"SELECT bx.value FROM
%s
AS bx,
%s
AS bibx WHERE bibx.id_bibrec='
%s
' AND bx.id=bibx.id_bibxxx AND bx.tag LIKE '
%s
'"
\
"ORDER BY bibx.field_number, bx.tag ASC"
%
(
bx
,
bibx
,
recID
,
tag
)
res
=
run_sql
(
query
)
for
row
in
res
:
out
.
append
(
row
[
0
])
return
out
def
get_creation_date
(
recID
,
fmt
=
"%Y-%m-
%d
"
):
"Returns the creation date of the record 'recID'."
out
=
""
res
=
run_sql
(
"SELECT DATE_FORMAT(creation_date,
%s
) FROM bibrec WHERE id=
%s
"
,
(
fmt
,
recID
),
1
)
if
res
:
out
=
res
[
0
][
0
]
return
out
def
get_modification_date
(
recID
,
fmt
=
"%Y-%m-
%d
"
):
"Returns the date of last modification for the record 'recID'."
out
=
""
res
=
run_sql
(
"SELECT DATE_FORMAT(modification_date,
%s
) FROM bibrec WHERE id=
%s
"
,
(
fmt
,
recID
),
1
)
if
res
:
out
=
res
[
0
][
0
]
return
out
#_ = gettext_set_language(ln)
out
=
""
# sanity check:
record_exist_p
=
record_exists
(
recID
)
if
record_exist_p
==
0
:
# doesn't exist
return
out
# print record opening tags, if needed:
if
format
==
"marcxml"
or
format
==
"oai_dc"
:
out
+=
" <record>
\n
"
out
+=
" <header>
\n
"
for
identifier
in
get_fieldvalues
(
recID
,
CFG_OAI_ID_FIELD
):
out
+=
" <identifier>
%s
</identifier>
\n
"
%
identifier
out
+=
" <datestamp>
%s
</datestamp>
\n
"
%
get_modification_date
(
recID
)
out
+=
" </header>
\n
"
out
+=
" <metadata>
\n
"
if
format
.
startswith
(
"xm"
)
or
format
==
"marcxml"
:
res
=
None
if
on_the_fly
==
False
:
# look for cached format existence:
query
=
"""SELECT value FROM bibfmt WHERE
id_bibrec='%s' AND format='%s'"""
%
(
recID
,
format
)
res
=
run_sql
(
query
,
None
,
1
)
if
res
and
record_exist_p
==
1
:
# record 'recID' is formatted in 'format', so print it
out
+=
"
%s
"
%
decompress
(
res
[
0
][
0
])
else
:
# record 'recID' is not formatted in 'format' -- they are
# not in "bibfmt" table; so fetch all the data from
# "bibXXx" tables:
if
format
==
"marcxml"
:
out
+=
""" <record xmlns="http://www.loc.gov/MARC21/slim">\n"""
out
+=
" <controlfield tag=
\"
001
\"
>
%d
</controlfield>
\n
"
%
int
(
recID
)
elif
format
.
startswith
(
"xm"
):
out
+=
""" <record>\n"""
out
+=
" <controlfield tag=
\"
001
\"
>
%d
</controlfield>
\n
"
%
int
(
recID
)
if
record_exist_p
==
-
1
:
# deleted record, so display only OAI ID and 980:
oai_ids
=
get_fieldvalues
(
recID
,
CFG_OAI_ID_FIELD
)
if
oai_ids
:
out
+=
"<datafield tag=
\"
%s
\"
ind1=
\"
%s
\"
ind2=
\"
%s
\"
><subfield code=
\"
%s
\"
>
%s
</subfield></datafield>
\n
"
%
\
(
CFG_OAI_ID_FIELD
[
0
:
3
],
CFG_OAI_ID_FIELD
[
3
:
4
],
CFG_OAI_ID_FIELD
[
4
:
5
],
CFG_OAI_ID_FIELD
[
5
:
6
],
oai_ids
[
0
])
out
+=
"<datafield tag=
\"
980
\"
ind1=
\"
\"
ind2=
\"
\"
><subfield code=
\"
c
\"
>DELETED</subfield></datafield>
\n
"
else
:
# controlfields
query
=
"SELECT b.tag,b.value,bb.field_number FROM bib00x AS b, bibrec_bib00x AS bb "
\
"WHERE bb.id_bibrec='
%s
' AND b.id=bb.id_bibxxx AND b.tag LIKE '00
%%
' "
\
"ORDER BY bb.field_number, b.tag ASC"
%
recID
res
=
run_sql
(
query
)
for
row
in
res
:
field
,
value
=
row
[
0
],
row
[
1
]
value
=
encode_for_xml
(
value
)
out
+=
""" <controlfield tag="%s">%s</controlfield>\n"""
%
\
(
encode_for_xml
(
field
[
0
:
3
]),
value
)
# datafields
i
=
1
# Do not process bib00x and bibrec_bib00x, as
# they are controlfields. So start at bib01x and
# bibrec_bib00x (and set i = 0 at the end of
# first loop)
for
digit1
in
range
(
0
,
10
):
for
digit2
in
range
(
i
,
10
):
bx
=
"bib
%d%d
x"
%
(
digit1
,
digit2
)
bibx
=
"bibrec_bib
%d%d
x"
%
(
digit1
,
digit2
)
query
=
"SELECT b.tag,b.value,bb.field_number FROM
%s
AS b,
%s
AS bb "
\
"WHERE bb.id_bibrec='
%s
' AND b.id=bb.id_bibxxx AND b.tag LIKE '
%s%%
' "
\
"ORDER BY bb.field_number, b.tag ASC"
%
(
bx
,
bibx
,
recID
,
str
(
digit1
)
+
str
(
digit2
))
res
=
run_sql
(
query
)
field_number_old
=
-
999
field_old
=
""
for
row
in
res
:
field
,
value
,
field_number
=
row
[
0
],
row
[
1
],
row
[
2
]
ind1
,
ind2
=
field
[
3
],
field
[
4
]
if
ind1
==
"_"
or
ind1
==
""
:
ind1
=
" "
if
ind2
==
"_"
or
ind2
==
""
:
ind2
=
" "
# print field tag
if
field_number
!=
field_number_old
or
\
field
[:
-
1
]
!=
field_old
[:
-
1
]:
if
field_number_old
!=
-
999
:
out
+=
""" </datafield>\n"""
out
+=
""" <datafield tag="%s" ind1="%s" ind2="%s">\n"""
%
\
(
encode_for_xml
(
field
[
0
:
3
]),
encode_for_xml
(
ind1
),
encode_for_xml
(
ind2
))
field_number_old
=
field_number
field_old
=
field
# print subfield value
value
=
encode_for_xml
(
value
)
out
+=
""" <subfield code="%s">%s</subfield>\n"""
%
\
(
encode_for_xml
(
field
[
-
1
:]),
value
)
# all fields/subfields printed in this run, so close the tag:
if
field_number_old
!=
-
999
:
out
+=
""" </datafield>\n"""
i
=
0
# Next loop should start looking at bib%0 and bibrec_bib00x
# we are at the end of printing the record:
out
+=
" </record>
\n
"
elif
format
==
"xd"
or
format
==
"oai_dc"
:
# XML Dublin Core format, possibly OAI -- select only some bibXXx fields:
out
+=
""" <dc xmlns="http://purl.org/dc/elements/1.1/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://purl.org/dc/elements/1.1/
http://www.openarchives.org/OAI/1.1/dc.xsd">\n"""
if
record_exist_p
==
-
1
:
out
+=
""
else
:
for
f
in
get_fieldvalues
(
recID
,
"041__a"
):
out
+=
" <language>
%s
</language>
\n
"
%
f
for
f
in
get_fieldvalues
(
recID
,
"100__a"
):
out
+=
" <creator>
%s
</creator>
\n
"
%
encode_for_xml
(
f
)
for
f
in
get_fieldvalues
(
recID
,
"700__a"
):
out
+=
" <creator>
%s
</creator>
\n
"
%
encode_for_xml
(
f
)
for
f
in
get_fieldvalues
(
recID
,
"245__a"
):
out
+=
" <title>
%s
</title>
\n
"
%
encode_for_xml
(
f
)
for
f
in
get_fieldvalues
(
recID
,
"65017a"
):
out
+=
" <subject>
%s
</subject>
\n
"
%
encode_for_xml
(
f
)
for
f
in
get_fieldvalues
(
recID
,
"8564_u"
):
out
+=
" <identifier>
%s
</identifier>
\n
"
%
encode_for_xml
(
f
)
for
f
in
get_fieldvalues
(
recID
,
"520__a"
):
out
+=
" <description>
%s
</description>
\n
"
%
encode_for_xml
(
f
)
out
+=
" <date>
%s
</date>
\n
"
%
get_creation_date
(
recID
)
out
+=
" </dc>
\n
"
# print record closing tags, if needed:
if
format
==
"marcxml"
or
format
==
"oai_dc"
:
out
+=
" </metadata>
\n
"
out
+=
" </record>
\n
"
return
out
def
parse_tag
(
tag
):
"""
Parse a marc code and decompose it in a table with:
0-tag 1-indicator1 2-indicator2 3-subfield
The first 3 chars always correspond to tag.
The indicators are optional. However they must both be indicated, or both ommitted.
If indicators are ommitted or indicated with underscore '_', they mean "No indicator".
"No indicator" is also equivalent indicator marked as whitespace.
The subfield is optional. It can optionally be preceded by a dot '.' or '$$' or '$'
Any of the chars can be replaced by wildcard %
THE FUNCTION DOES NOT CHECK WELLFORMNESS OF 'tag'
Any empty chars is not considered
For example:
>> parse_tag('245COc') = ['245', 'C', 'O', 'c']
>> parse_tag('245C_c') = ['245', 'C', '', 'c']
>> parse_tag('245__c') = ['245', '', '', 'c']
>> parse_tag('245__$$c') = ['245', '', '', 'c']
>> parse_tag('245__$c') = ['245', '', '', 'c']
>> parse_tag('245 $c') = ['245', '', '', 'c']
>> parse_tag('245 $$c') = ['245', '', '', 'c']
>> parse_tag('245__.c') = ['245', '', '', 'c']
>> parse_tag('245 .c') = ['245', '', '', 'c']
>> parse_tag('245C_$c') = ['245', 'C', '', 'c']
>> parse_tag('245CO$$c') = ['245', 'C', 'O', 'c']
>> parse_tag('245C_.c') = ['245', 'C', '', 'c']
>> parse_tag('245$c') = ['245', '', '', 'c']
>> parse_tag('245.c') = ['245', '', '', 'c']
>> parse_tag('245$$c') = ['245', '', '', 'c']
>> parse_tag('245__%') = ['245', '', '', '']
>> parse_tag('245__$$%') = ['245', '', '', '']
>> parse_tag('245__$%') = ['245', '', '', '']
>> parse_tag('245 $%') = ['245', '', '', '']
>> parse_tag('245 $$%') = ['245', '', '', '']
>> parse_tag('245$%') = ['245', '', '', '']
>> parse_tag('245.%') = ['245', '', '', '']
>> parse_tag('245$$%') = ['245', '', '', '']
>> parse_tag('2%5$$a') = ['2%5', '', '', 'a']
"""
p_tag
=
[
''
,
''
,
''
,
''
]
# tag, ind1, ind2, code
tag
=
tag
.
replace
(
" "
,
""
)
# Remove empty characters
tag
=
tag
.
replace
(
"$"
,
""
)
# Remove $ characters
tag
=
tag
.
replace
(
"."
,
""
)
# Remove . characters
#tag = tag.replace("_", "") # Remove _ characters
p_tag
[
0
]
=
tag
[
0
:
3
]
# tag
if
len
(
tag
)
==
4
:
p_tag
[
3
]
=
tag
[
3
]
# subfield
elif
len
(
tag
)
==
5
:
ind1
=
tag
[
3
]
# indicator 1
if
ind1
!=
"_"
:
p_tag
[
1
]
=
ind1
ind2
=
tag
[
4
]
# indicator 2
if
ind2
!=
"_"
:
p_tag
[
2
]
=
ind2
elif
len
(
tag
)
==
6
:
p_tag
[
3
]
=
tag
[
5
]
# subfield
ind1
=
tag
[
3
]
# indicator 1
if
ind1
!=
"_"
:
p_tag
[
1
]
=
ind1
ind2
=
tag
[
4
]
# indicator 2
if
ind2
!=
"_"
:
p_tag
[
2
]
=
ind2
return
p_tag
def
get_all_fieldvalues
(
recID
,
tags_in
):
"""
Returns list of values that belong to fields in tags_in for record
with given recID.
Note that when a partial 'tags_in' is specified (eg. '100__'), the
subfields of all corresponding datafields are returned all 'mixed'
together. Eg. with:
123 100__ $a Ellis, J $u CERN
123 100__ $a Smith, K
>> get_all_fieldvalues(123, '100__')
['Ellis, J', 'CERN', 'Smith, K']
"""
out
=
[]
if
type
(
tags_in
)
is
not
list
:
tags_in
=
[
tags_in
,
]
dict_of_tags_out
=
{}
if
not
tags_in
:
for
i
in
range
(
0
,
10
):
for
j
in
range
(
0
,
10
):
dict_of_tags_out
[
"
%d%d%%
"
%
(
i
,
j
)]
=
'%'
else
:
for
tag
in
tags_in
:
if
len
(
tag
)
==
0
:
for
i
in
range
(
0
,
10
):
for
j
in
range
(
0
,
10
):
dict_of_tags_out
[
"
%d%d%%
"
%
(
i
,
j
)]
=
'%'
elif
len
(
tag
)
==
1
:
for
j
in
range
(
0
,
10
):
dict_of_tags_out
[
"
%s%d%%
"
%
(
tag
,
j
)]
=
'%'
elif
len
(
tag
)
<=
5
:
dict_of_tags_out
[
"
%s%%
"
%
tag
]
=
'%'
else
:
dict_of_tags_out
[
tag
[
0
:
5
]]
=
tag
[
5
:
6
]
tags_out
=
dict_of_tags_out
.
keys
()
tags_out
.
sort
()
# search all bibXXx tables as needed:
for
tag
in
tags_out
:
digits
=
tag
[
0
:
2
]
try
:
intdigits
=
int
(
digits
)
if
intdigits
<
0
or
intdigits
>
99
:
raise
ValueError
except
ValueError
:
# invalid tag value asked for
continue
bx
=
"bib
%s
x"
%
digits
bibx
=
"bibrec_bib
%s
x"
%
digits
query
=
"SELECT b.tag,b.value,bb.field_number FROM
%s
AS b,
%s
AS bb "
\
"WHERE bb.id_bibrec=
%%
s AND b.id=bb.id_bibxxx AND b.tag LIKE
%%
s"
\
"ORDER BY bb.field_number, b.tag ASC"
%
(
bx
,
bibx
)
res
=
run_sql
(
query
,
(
recID
,
str
(
tag
)
+
dict_of_tags_out
[
tag
]))
# go through fields:
for
row
in
res
:
field
,
value
,
field_number
=
row
[
0
],
row
[
1
],
row
[
2
]
out
.
append
(
value
)
return
out
re_bold_latex
=
re
.
compile
(
'\$?
\\\\
textbf\{(?P<content>.*?)\}\$?'
)
re_emph_latex
=
re
.
compile
(
'\$?
\\\\
emph\{(?P<content>.*?)\}\$?'
)
re_generic_start_latex
=
re
.
compile
(
'\$?
\\\\
begin\{(?P<content>.*?)\}\$?'
)
re_generic_end_latex
=
re
.
compile
(
'\$?
\\\\
end\{(?P<content>.*?)\}\$?'
)
re_verbatim_env_latex
=
re
.
compile
(
'
\\\\
begin\{verbatim.*?\}(?P<content>.*?)
\\\\
end\{verbatim.*?\}'
)
def
latex_to_html
(
text
):
"""
Do some basic interpretation of LaTeX input. Gives some nice
results when used in combination with JSMath.
"""
# Process verbatim environment first
def
make_verbatim
(
match_obj
):
"""Replace all possible special chars by HTML character
entities, so that they are not interpreted by further commands"""
return
'<br/><pre class="tex2math_ignore">'
+
\
string_to_numeric_char_reference
(
match_obj
.
group
(
'content'
))
+
\
'</pre><br/>'
text
=
re_verbatim_env_latex
.
sub
(
make_verbatim
,
text
)
# Remove trailing "line breaks"
text
=
text
.
strip
(
'
\\\\
'
)
# Process special characters
text
=
text
.
replace
(
"
\\
%"
,
"%"
)
text
=
text
.
replace
(
"
\\
#"
,
"#"
)
text
=
text
.
replace
(
"
\\
$"
,
"$"
)
text
=
text
.
replace
(
"
\\
&"
,
"&"
)
text
=
text
.
replace
(
"
\\
{"
,
"{"
)
text
=
text
.
replace
(
"
\\
}"
,
"}"
)
text
=
text
.
replace
(
"
\\
_"
,
"_"
)
text
=
text
.
replace
(
"
\\
^{} "
,
"^"
)
text
=
text
.
replace
(
"
\\
~{} "
,
"~"
)
text
=
text
.
replace
(
"
\\
textregistered"
,
"®"
)
text
=
text
.
replace
(
"
\\
copyright"
,
"©"
)
text
=
text
.
replace
(
"
\\
texttrademark"
,
"™ "
)
# Remove commented lines and join lines
text
=
'
\\\\
'
.
join
([
line
for
line
in
text
.
split
(
'
\\\\
'
)
\
if
not
line
.
lstrip
()
.
startswith
(
'%'
)])
# Line breaks
text
=
text
.
replace
(
'
\\\\
'
,
'<br/>'
)
# Non-breakable spaces
text
=
text
.
replace
(
'~'
,
' '
)
# Styled text
def
make_bold
(
match_obj
):
"Make the found pattern bold"
# FIXME: check if it is valid to have this inside a formula
return
'<b>'
+
match_obj
.
group
(
'content'
)
+
'</b>'
text
=
re_bold_latex
.
sub
(
make_bold
,
text
)
def
make_emph
(
match_obj
):
"Make the found pattern emphasized"
# FIXME: for the moment, remove as it could cause problem in
# the case it is used in a formula. To be check if it is valid.
return
' '
+
match_obj
.
group
(
'content'
)
+
''
text
=
re_emph_latex
.
sub
(
make_emph
,
text
)
# Lists
text
=
text
.
replace
(
'
\\
begin{enumerate}'
,
'<ol>'
)
text
=
text
.
replace
(
'
\\
end{enumerate}'
,
'</ol>'
)
text
=
text
.
replace
(
'
\\
begin{itemize}'
,
'<ul>'
)
text
=
text
.
replace
(
'
\\
end{itemize}'
,
'</ul>'
)
text
=
text
.
replace
(
'
\\
item'
,
'<li>'
)
# Remove remaining non-processed tags
text
=
re_generic_start_latex
.
sub
(
''
,
text
)
text
=
re_generic_end_latex
.
sub
(
''
,
text
)
return
text
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