aboutsummaryrefslogtreecommitdiffstats
path: root/fatcat_scholar/grobid2json.py
blob: e94bed2aeda87f2ef2683b0fc9e4a04bde00c18e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
#!/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 io
import json
import argparse
import xml.etree.ElementTree as ET
from typing import List, Any, Dict, AnyStr, 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(".//{%s}monogr/{%s}title" % (ns, ns))
    journal["publisher"] = elem.findtext(
        ".//{%s}publicationStmt/{%s}publisher" % (ns, ns)
    )
    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(".//{%s}analytic/{%s}title" % (ns, ns))
    other_title = elem.findtext(".//{%s}monogr/{%s}title" % (ns, ns))
    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(".//{%s}publicationStmt/{%s}publisher" % (ns, ns))
    if not ref["publisher"]:
        ref["publisher"] = elem.findtext(".//{%s}imprint/{%s}publisher" % (ns, ns))
    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(".//{%s}appInfo/{%s}application" % (ns, ns))[0]
    info["grobid_version"] = application_tag.attrib["version"].strip()
    info["grobid_timestamp"] = application_tag.attrib["when"].strip()
    info["title"] = header.findtext(".//{%s}analytic/{%s}title" % (ns, ns))
    info["authors"] = all_authors(
        header.find(".//{%s}sourceDesc/{%s}biblStruct" % (ns, ns))
    )
    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(".//{%s}listBibl/{%s}biblStruct" % (ns, ns))):
        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(".//{%s}profileDesc/{%s}abstract" % (ns, ns))
        info["abstract"] = (el or None) and " ".join(el.itertext()).strip()
        el = tei.find(".//{%s}text/{%s}body" % (ns, ns))
        info["body"] = (el or None) and " ".join(el.itertext()).strip()
        el = tei.find('.//{%s}back/{%s}div[@type="acknowledgement"]' % (ns, ns))
        info["acknowledgement"] = (el or None) and " ".join(el.itertext()).strip()
        el = tei.find('.//{%s}back/{%s}div[@type="annex"]' % (ns, ns))
        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()