TEI (Text Encoding Initiative) parser to extract information and store it in Neo4j database
This is a parser written in Python 3 that takes TEI-XML Documents as an inpput and writes them in a Neo4j Graph Database.
It makes use of the following existing libraries:
- Beautiful Soup 4 An easy-to-use XML parser
- Spacy. Currently we use the german language package
de_core_news_smto parse the text.
- Py2neo v4 whih is a library to work with the Neo4j database.
from tei2neo import parse, GraphUtils graph = Graph(host="localhost", user="neo4j", password="password") doc, status, soup = parse( filename=file, start_with_tag='TEI', idno='20-MS-221' ) tx = graph.begin() doc.save(tx) tx.commit() ut = GraphUtils(graph) paras = ut.paragraphs_for_filename('20_MS_221_1.xml') # create unhyphened tokens for para in paras: tokens = ut.tokens_in_paragraph(para) ut.create_unhyphenated(tokens) # show hyphened text for token in ut.tokens_in_paragraph(paras, concatenated=0): if 'lb' in token.labels: print(' | ', end='') print(token.get('string',''), end='') print(token.get('whitespace', ''), end='') # show concatenated (non-hyphened) version of the text for token in ut.tokens_in_paragraph(paras, concatenated=1): if 'lb' in token.labels: print(' ', end='') print(token.get('string',''), end='') print(token.get('whitespace', ''), end='')
How the parser works
A TEI document can be constructed in various ways and there are many elements that work very similarly. Likewise, this parser expects certain elements and treats them in a specific manner.
Elements that affect all following elements
handShift element affects all elements that are below, until another
handShift element is encountered.
From now on everything is written in «Latein» and a pencil is being used (medium=Blei):
<handShift new="#hWH" medium="Blei" script="Latein"/>
Now we switch to «Kurrent» script and use black ink (STinte):
<handShift new="#hGS" medium="STinte" script="Kurrent"/>
Appearance in Neo4j
As we have seen, a
handShift element contains three attributes:
These attributes are passed to all Token elements that follow after a
handShift occurs. Previous attributes are not deleted, i.e. if only the medium changes from «Blei» to «STinte», all other attributes stay the same.
handShift element will not appear as a node in Neo4j.
delSpan element works much like a
handShift element, as it alters the appearance of all the following text until it reaches its
<delSpan spanTo="#A20_MS_215_12_3"/> ... (a lot of XML code here) <anchor xml:id="A20_MS_215_12_3"/>
Appearance in Neo4j
- both the
anchorappear as additional nodes.
- all elements between the
anchorelement receive an additional
delSpanattribute is added to every element, the value is equal to the
xml:idattribute of the anchor.
Elements that affect all contained elements
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