"""
This module aims to provide facilities for accessing data from e3c corpus.
**Version** : 2.0.0
**License**: The E3C corpus is released under Creative Commons NonCommercial license
(CC BY-NC).
**Github**: https://github.com/hltfbk/E3C-Corpus
**Reference**
B. magnini, B. Altuna, A. Lavelli, M. Speranza, and R. Zanoli. 2020.
The E3C Project: Collection and Annotation of a Multilingual Corpus of Clinical Cases.
In Proceedings of the Seventh Italian Conference on Computational Linguistics, Bologna,
Italy, December.
Associazione Italiana di Linguistica Computazionale.
"""
__all__ = [
"load_document",
"load_data_collection",
"convert_data_collection_to_medkit",
"load_annotated_document",
"load_data_annotation",
"convert_data_annotation_to_medkit",
"SENTENCE_LABEL",
"CLINENTITY_LABEL",
]
import json
import logging
from xml.etree import ElementTree
from dataclasses import dataclass
from pathlib import Path
from typing import Dict, Iterator, Optional, List, Union
from medkit.core import generate_deterministic_id
from medkit.core.text import Entity, Segment, Span, TextDocument
from medkit.io.medkit_json import save_text_documents
from medkit.text.ner import UMLSNormAttribute
logger = logging.getLogger(__name__)
SENTENCE_LABEL = "sentence"
"""
Label used by medkit for annotated sentences of E3C corpus
"""
CLINENTITY_LABEL = "disorder"
"""
Label used by medkit for annotated clinical entities of E3C corpus
"""
@dataclass
class E3CDocument:
"""
Represents the data structure of a json document
in data collection folder of the E3C corpus
"""
authors: List[Dict] # list of {'author': '<name>'}
doi: str
publication_date: str
id: str
url: str
source: str
source_url: str
licence: str
language: str
type: str
description: str
text: str
def extract_metadata(self) -> dict:
"""Returns the metadata dict for medkit text document"""
dict_repr = self.__dict__.copy()
dict_repr.pop("text")
return dict_repr
[docs]def load_document(
filepath: Union[str, Path],
encoding: str = "utf-8",
) -> TextDocument:
"""
Load a E3C corpus document (json document) as medkit text document.
For example, one in data collection folder.
Document id is always kept in medkit document metadata.
Parameters
----------
filepath
The path to the json file of the E3C corpus
encoding
The encoding of the file. Default: 'utf-8'
Returns
-------
TextDocument
The corresponding medkit text document
"""
with open(filepath, encoding=encoding) as f:
doc = E3CDocument(**json.load(f))
uid = str(generate_deterministic_id(doc.id))
return TextDocument(text=doc.text, uid=uid, metadata=doc.extract_metadata())
[docs]def load_data_collection(
dir_path: Union[Path, str],
encoding: str = "utf-8",
) -> Iterator[TextDocument]:
"""
Load the E3C corpus data collection as medkit text documents
Parameters
----------
dir_path
The path to the E3C corpus data collection directory containing the json files
(e.g., /tmp/E3C-Corpus-2.0.0/data_collection/French/layer1)
encoding
The encoding of the files. Default: 'utf-8'
Returns
-------
Iterator[TextDocument]
An iterator on corresponding medkit text documents
"""
dir_path = Path(dir_path)
if not dir_path.exists() or not dir_path.is_dir():
raise FileNotFoundError("%s is not a directory or does not exist", dir_path)
for filepath in dir_path.glob("*.json"):
yield load_document(filepath, encoding=encoding)
[docs]def convert_data_collection_to_medkit(
dir_path: Union[Path, str],
output_file: Union[str, Path],
encoding: Optional[str] = "utf-8",
):
"""
Convert E3C corpus data collection to medkit jsonl file
Parameters
----------
dir_path
The path to the E3C corpus data collection directory containing the json files
(e.g., /tmp/E3C-Corpus-2.0.0/data_collection/French/layer1)
output_file
The medkit jsonl output file which will contain medkit text documents
encoding
The encoding of the files. Default: 'utf-8'
"""
docs = load_data_collection(dir_path=dir_path, encoding=encoding)
save_text_documents(docs=docs, output_file=output_file, encoding=encoding)
[docs]def load_annotated_document(
filepath: Union[str, Path],
encoding: str = "utf-8",
keep_sentences=False,
) -> TextDocument:
"""
Load a E3C corpus annotated document (xml document) as medkit text document.
For example, one in data annotation folder.
Each annotation id is always kept in corresponding medkit element metadata.
For the time being, only supports 'CLINENTITY' annotations.
'SENTENCE' annotations may be also loaded.
Parameters
----------
filepath
The path to the xml file of the E3C corpus
encoding
The encoding of the file. Default: 'utf-8'
keep_sentences
Whether to load sentences into medkit documents.
Returns
-------
TextDocument
The corresponding medkit text document
"""
xml_parser = ElementTree.XMLParser(encoding=encoding)
root = ElementTree.parse(filepath, parser=xml_parser).getroot()
# get xml namespaces
ns = dict(
[node for _, node in ElementTree.iterparse(filepath, events=["start-ns"])]
)
metadata = root.find("custom:METADATA", ns).attrib
text = root.find("cas:Sofa", ns).attrib.get("sofaString", "")
doc = E3CDocument(
authors=[
{"author": author.strip()} for author in metadata["docAuthor"].split(";")
],
doi=metadata["docDOI"],
publication_date=metadata["docTime"],
id=metadata["docName"],
url=metadata["docUrl"],
source=metadata["docSource"],
source_url=metadata["docSourceUrl"],
licence=metadata["docLicense"],
language=metadata["docLanguage"],
type=metadata["pubType"],
description=metadata["note"],
text=text,
)
# create medkit text document
doc_uid = str(generate_deterministic_id(doc.id))
medkit_doc = TextDocument(
text=doc.text, uid=doc_uid, metadata=doc.extract_metadata()
)
# parse sentences if wanted by user
if keep_sentences:
for elem in root.findall("type4:Sentence", ns):
sentence = elem.attrib
span = Span(int(sentence["begin"]), int(sentence["end"]))
sentence_uid = sentence["{http://www.omg.org/XMI}id"]
medkit_sentence = Segment(
uid=str(generate_deterministic_id(doc_uid + sentence_uid)),
label=SENTENCE_LABEL,
spans=[span],
text=doc.text[span.start : span.end],
metadata={"id": sentence_uid},
)
# attach medkit sentence to medkit document
medkit_doc.anns.add(medkit_sentence)
# parse clinical entities
for elem in root.findall("custom:CLINENTITY", ns):
clin_entity = elem.attrib
span = Span(int(clin_entity["begin"]), int(clin_entity["end"]))
entity_uid = clin_entity[
"{http://www.omg.org/XMI}id"
] # retrieve xmi:id from attributes
medkit_entity = Entity(
uid=str(generate_deterministic_id(doc_uid + entity_uid)),
label=CLINENTITY_LABEL,
spans=[span],
text=doc.text[span.start : span.end],
metadata={"id": entity_uid},
)
# add normalization attribute to medkit entity
cui = clin_entity.get("entityID")
if cui is not None:
metadata = {
"id": clin_entity.get("{http://www.omg.org/XMI}id"),
"entityIDEN": clin_entity.get("entityIDEN"),
"discontinuous": clin_entity.get("discontinuous"),
"xtra": clin_entity.get("xtra"),
}
attr_uid = str(generate_deterministic_id("norm" + doc_uid + entity_uid))
attr = UMLSNormAttribute(
cui=cui, umls_version="", metadata=metadata, uid=str(attr_uid)
)
medkit_entity.attrs.add(attr)
else:
logger.debug(f"no cui for {medkit_entity}")
# attach medkit entity to medkit document
medkit_doc.anns.add(medkit_entity)
return medkit_doc
[docs]def load_data_annotation(
dir_path: Union[Path, str],
encoding: str = "utf-8",
keep_sentences: bool = False,
) -> Iterator[TextDocument]:
"""
Load the E3C corpus data annotation as medkit text documents.
Parameters
----------
dir_path
The path to the E3C corpus data annotation directory containing the xml files
(e.g., /tmp/E3C-Corpus-2.0.0/data_annotation/French/layer1)
encoding
The encoding of the files. Default: 'utf-8'
keep_sentences
Whether to load sentences into medkit documents.
Returns
-------
Iterator[TextDocument]
An iterator on corresponding medkit text documents
"""
dir_path = Path(dir_path)
if not dir_path.exists() or not dir_path.is_dir():
raise FileNotFoundError("%s is not a directory or does not exist", dir_path)
for filepath in dir_path.glob("*.xml"):
yield load_annotated_document(
filepath, encoding=encoding, keep_sentences=keep_sentences
)
[docs]def convert_data_annotation_to_medkit(
dir_path: Union[Path, str],
output_file: Union[str, Path],
encoding: Optional[str] = "utf-8",
keep_sentences: bool = False,
):
"""
Convert E3C corpus data annotation to medkit jsonl file.
Parameters
----------
dir_path
The path to the E3C corpus data collection directory containing the json files
(e.g., /tmp/E3C-Corpus-2.0.0/data_collection/French/layer1)
output_file
The medkit jsonl output file which will contain medkit text documents
encoding
The encoding of the files. Default: 'utf-8'
keep_sentences
Whether to load sentences into medkit documents.
"""
docs = load_data_annotation(
dir_path=dir_path,
encoding=encoding,
keep_sentences=keep_sentences,
)
save_text_documents(docs=docs, output_file=output_file, encoding=encoding)
