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#!/usr/bin/env python3
"""
NB: adapted to work as a library for PDF extraction. Will probably be
re-written eventually to be correct, complete, and robust; this is just a
first iteration.
This script tries to extract everything from a GROBID TEI XML fulltext dump:
- header metadata
- affiliations
- references (with context)
- abstract
- fulltext
- tables, figures, equations
A flag can be specified to disable copyright encumbered bits (--no-emcumbered):
- abstract
- fulltext
- tables, figures, equations
Prints JSON to stdout, errors to stderr
This file copied from the sandcrawler repository.
"""
import argparse
import io
import json
import xml.etree.ElementTree as ET
from typing import Any, AnyStr, Dict, List, Optional
xml_ns = "http://www.w3.org/XML/1998/namespace"
ns = "http://www.tei-c.org/ns/1.0"
def all_authors(elem: Optional[ET.Element], ns: str = ns) -> List[Dict[str, Any]]:
if not elem:
return []
names = []
for author in elem.findall(".//{%s}author" % ns):
pn = author.find("./{%s}persName" % ns)
if not pn:
continue
given_name = pn.findtext("./{%s}forename" % ns) or None
surname = pn.findtext("./{%s}surname" % ns) or None
full_name = " ".join(pn.itertext())
obj: Dict[str, Any] = dict(name=full_name)
if given_name:
obj["given_name"] = given_name
if surname:
obj["surname"] = surname
ae = author.find("./{%s}affiliation" % ns)
if ae:
affiliation: Dict[str, Any] = dict()
for on in ae.findall("./{%s}orgName" % ns):
on_type = on.get("type")
if on_type:
affiliation[on_type] = on.text
addr_e = ae.find("./{%s}address" % ns)
if addr_e:
address = dict()
for t in addr_e.getchildren():
address[t.tag.split("}")[-1]] = t.text
if address:
affiliation["address"] = address
# affiliation['address'] = {
# 'post_code': addr.findtext('./{%s}postCode' % ns) or None,
# 'settlement': addr.findtext('./{%s}settlement' % ns) or None,
# 'country': addr.findtext('./{%s}country' % ns) or None,
# }
obj["affiliation"] = affiliation
names.append(obj)
return names
def journal_info(elem: ET.Element) -> Dict[str, Any]:
journal = dict()
journal["name"] = elem.findtext(f".//{{{ns}}}monogr/{{{ns}}}title")
journal["publisher"] = elem.findtext(
f".//{{{ns}}}publicationStmt/{{{ns}}}publisher"
)
if journal["publisher"] == "":
journal["publisher"] = None
journal["issn"] = elem.findtext('.//{%s}idno[@type="ISSN"]' % ns)
journal["eissn"] = elem.findtext('.//{%s}idno[@type="eISSN"]' % ns)
journal["volume"] = elem.findtext('.//{%s}biblScope[@unit="volume"]' % ns)
journal["issue"] = elem.findtext('.//{%s}biblScope[@unit="issue"]' % ns)
keys = list(journal.keys())
# remove empty/null keys
for k in keys:
if not journal[k]:
journal.pop(k)
return journal
def biblio_info(elem: ET.Element, ns: str = ns) -> Dict[str, Any]:
ref: Dict[str, Any] = dict()
ref["id"] = elem.attrib.get("{http://www.w3.org/XML/1998/namespace}id")
ref["unstructured"] = elem.findtext('.//{%s}note[@type="raw_reference"]' % ns)
# Title stuff is messy in references...
ref["title"] = elem.findtext(f".//{{{ns}}}analytic/{{{ns}}}title")
other_title = elem.findtext(f".//{{{ns}}}monogr/{{{ns}}}title")
if other_title:
if ref["title"]:
ref["journal"] = other_title
else:
ref["journal"] = None
ref["title"] = other_title
ref["authors"] = all_authors(elem, ns=ns)
ref["publisher"] = elem.findtext(f".//{{{ns}}}publicationStmt/{{{ns}}}publisher")
if not ref["publisher"]:
ref["publisher"] = elem.findtext(f".//{{{ns}}}imprint/{{{ns}}}publisher")
if ref["publisher"] == "":
ref["publisher"] = None
date = elem.find('.//{%s}date[@type="published"]' % ns)
ref["date"] = (date is not None) and date.attrib.get("when")
ref["volume"] = elem.findtext('.//{%s}biblScope[@unit="volume"]' % ns)
ref["issue"] = elem.findtext('.//{%s}biblScope[@unit="issue"]' % ns)
ref["doi"] = elem.findtext('.//{%s}idno[@type="DOI"]' % ns)
ref["arxiv_id"] = elem.findtext('.//{%s}idno[@type="arXiv"]' % ns)
if ref["arxiv_id"] and ref["arxiv_id"].startswith("arXiv:"):
ref["arxiv_id"] = ref["arxiv_id"][6:]
ref["pmcid"] = elem.findtext('.//{%s}idno[@type="PMCID"]' % ns)
ref["pmid"] = elem.findtext('.//{%s}idno[@type="PMID"]' % ns)
el = elem.find('.//{%s}biblScope[@unit="page"]' % ns)
if el is not None:
if el.attrib.get("from") and el.attrib.get("to"):
ref["pages"] = "{}-{}".format(el.attrib["from"], el.attrib["to"])
else:
ref["pages"] = el.text
el = elem.find(".//{%s}ptr[@target]" % ns)
if el is not None:
ref["url"] = el.attrib["target"]
# Hand correction
if ref["url"].endswith(".Lastaccessed"):
ref["url"] = ref["url"].replace(".Lastaccessed", "")
if ref["url"].startswith("<"):
ref["url"] = ref["url"][1:]
if ">" in ref["url"]:
ref["url"] = ref["url"].split(">")[0]
else:
ref["url"] = None
return ref
def teixml2json(content: AnyStr, encumbered: bool = True) -> Dict[str, Any]:
if isinstance(content, str):
tree = ET.parse(io.StringIO(content))
elif isinstance(content, bytes):
tree = ET.parse(io.BytesIO(content))
info: Dict[str, Any] = dict()
# print(content)
# print(content.getvalue())
tei = tree.getroot()
header = tei.find(".//{%s}teiHeader" % ns)
if header is None:
raise ValueError("XML does not look like TEI format")
application_tag = header.findall(f".//{{{ns}}}appInfo/{{{ns}}}application")[0]
info["grobid_version"] = application_tag.attrib["version"].strip()
info["grobid_timestamp"] = application_tag.attrib["when"].strip()
info["title"] = header.findtext(f".//{{{ns}}}analytic/{{{ns}}}title")
info["authors"] = all_authors(
header.find(f".//{{{ns}}}sourceDesc/{{{ns}}}biblStruct")
)
info["journal"] = journal_info(header)
date = header.find('.//{%s}date[@type="published"]' % ns)
info["date"] = (date is not None) and date.attrib.get("when")
info["fatcat_release"] = header.findtext('.//{%s}idno[@type="fatcat"]' % ns)
info["doi"] = header.findtext('.//{%s}idno[@type="DOI"]' % ns)
if info["doi"]:
info["doi"] = info["doi"].lower()
refs = []
for (i, bs) in enumerate(tei.findall(f".//{{{ns}}}listBibl/{{{ns}}}biblStruct")):
ref = biblio_info(bs)
ref["index"] = i
refs.append(ref)
info["citations"] = refs
text = tei.find(".//{%s}text" % (ns))
# print(text.attrib)
if text and text.attrib.get("{%s}lang" % xml_ns):
info["language_code"] = text.attrib["{%s}lang" % xml_ns] # xml:lang
if encumbered:
el = tei.find(f".//{{{ns}}}profileDesc/{{{ns}}}abstract")
info["abstract"] = (el or None) and " ".join(el.itertext()).strip()
el = tei.find(f".//{{{ns}}}text/{{{ns}}}body")
info["body"] = (el or None) and " ".join(el.itertext()).strip()
el = tei.find(f'.//{{{ns}}}back/{{{ns}}}div[@type="acknowledgement"]')
info["acknowledgement"] = (el or None) and " ".join(el.itertext()).strip()
el = tei.find(f'.//{{{ns}}}back/{{{ns}}}div[@type="annex"]')
info["annex"] = (el or None) and " ".join(el.itertext()).strip()
# remove empty/null keys
keys = list(info.keys())
for k in keys:
if not info[k]:
info.pop(k)
return info
def main() -> None: # pragma no cover
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
description="GROBID TEI XML to JSON",
usage="%(prog)s [options] <teifile>...",
)
parser.add_argument(
"--no-encumbered",
action="store_true",
help="don't include ambiguously copyright encumbered fields (eg, abstract, body)",
)
parser.add_argument("teifiles", nargs="+")
args = parser.parse_args()
for filename in args.teifiles:
content = open(filename, "r").read()
print(
json.dumps(
teixml2json(content, encumbered=(not args.no_encumbered)),
sort_keys=True,
)
)
if __name__ == "__main__": # pragma no cover
main()
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