1 files changed, 130 insertions, 0 deletions
diff --git a/backend/tolData/dbpedia/genDescData.py b/backend/tolData/dbpedia/genDescData.py
new file mode 100755
index 0000000..d9e8a80
--- /dev/null
+++ b/backend/tolData/dbpedia/genDescData.py
@@ -0,0 +1,130 @@
+#!/usr/bin/python3
+
+import sys, re
+import bz2, sqlite3
+
+usageInfo = f"""
+Usage: {sys.argv[0]}
+
+Adds DBpedia labels/types/abstracts/etc data into a database.
+"""
+if len(sys.argv) > 1:
+	print(usageInfo, file=sys.stderr)
+	sys.exit(1)
+
+labelsFile = "labels_lang=en.ttl.bz2" # Had about 16e6 entries
+idsFile = "page_lang=en_ids.ttl.bz2"
+redirectsFile = "redirects_lang=en_transitive.ttl.bz2"
+disambigFile = "disambiguations_lang=en.ttl.bz2"
+typesFile = "instance-types_lang=en_specific.ttl.bz2"
+abstractsFile = "short-abstracts_lang=en.ttl.bz2"
+dbFile = "descData.db"
+# In testing, this script took a few hours to run, and generated about 10GB
+
+print("Creating database")
+dbCon = sqlite3.connect(dbFile)
+dbCur = dbCon.cursor()
+
+print("Reading/storing label data")
+dbCur.execute("CREATE TABLE labels (iri TEXT PRIMARY KEY, label TEXT)")
+dbCur.execute("CREATE INDEX labels_idx ON labels(label)")
+dbCur.execute("CREATE INDEX labels_idx_nc ON labels(label COLLATE NOCASE)")
+labelLineRegex = re.compile(r'<([^>]+)> <[^>]+> "((?:[^"]|\\")+)"@en \.\n')
+lineNum = 0
+with bz2.open(labelsFile, mode='rt') as file:
+	for line in file:
+		lineNum += 1
+		if lineNum % 1e5 == 0:
+			print(f"At line {lineNum}")
+		#
+		match = labelLineRegex.fullmatch(line)
+		if match == None:
+			raise Exception(f"ERROR: Line {lineNum} has unexpected format")
+		dbCur.execute("INSERT INTO labels VALUES (?, ?)", (match.group(1), match.group(2)))
+
+print("Reading/storing wiki page ids")
+dbCur.execute("CREATE TABLE ids (iri TEXT PRIMARY KEY, id INT)")
+idLineRegex = re.compile(r'<([^>]+)> <[^>]+> "(\d+)".*\n')
+lineNum = 0
+with bz2.open(idsFile, mode='rt') as file:
+	for line in file:
+		lineNum += 1
+		if lineNum % 1e5 == 0:
+			print(f"At line {lineNum}")
+		#
+		match = idLineRegex.fullmatch(line)
+		if match == None:
+			raise Exception(f"ERROR: Line {lineNum} has unexpected format")
+		try:
+			dbCur.execute("INSERT INTO ids VALUES (?, ?)", (match.group(1), int(match.group(2))))
+		except sqlite3.IntegrityError as e:
+			# Accounts for certain lines that have the same IRI
+			print(f"WARNING: Failed to add entry with IRI \"{match.group(1)}\": {e}")
+
+print("Reading/storing redirection data")
+dbCur.execute("CREATE TABLE redirects (iri TEXT PRIMARY KEY, target TEXT)")
+redirLineRegex = re.compile(r'<([^>]+)> <[^>]+> <([^>]+)> \.\n')
+lineNum = 0
+with bz2.open(redirectsFile, mode='rt') as file:
+	for line in file:
+		lineNum += 1
+		if lineNum % 1e5 == 0:
+			print(f"At line {lineNum}")
+		#
+		match = redirLineRegex.fullmatch(line)
+		if match == None:
+			raise Exception(f"ERROR: Line {lineNum} has unexpected format")
+		dbCur.execute("INSERT INTO redirects VALUES (?, ?)", (match.group(1), match.group(2)))
+
+print("Reading/storing diambiguation-page data")
+dbCur.execute("CREATE TABLE disambiguations (iri TEXT PRIMARY KEY)")
+disambigLineRegex = redirLineRegex
+lineNum = 0
+with bz2.open(disambigFile, mode='rt') as file:
+	for line in file:
+		lineNum += 1
+		if lineNum % 1e5 == 0:
+			print(f"At line {lineNum}")
+		#
+		match = disambigLineRegex.fullmatch(line)
+		if match == None:
+			raise Exception(f"ERROR: Line {lineNum} has unexpected format")
+		dbCur.execute("INSERT OR IGNORE INTO disambiguations VALUES (?)", (match.group(1),))
+
+print("Reading/storing instance-type data")
+dbCur.execute("CREATE TABLE types (iri TEXT, type TEXT)")
+dbCur.execute("CREATE INDEX types_iri_idx ON types(iri)")
+typeLineRegex = redirLineRegex
+lineNum = 0
+with bz2.open(typesFile, mode='rt') as file:
+	for line in file:
+		lineNum += 1
+		if lineNum % 1e5 == 0:
+			print(f"At line {lineNum}")
+		#
+		match = typeLineRegex.fullmatch(line)
+		if match == None:
+			raise Exception(f"ERROR: Line {lineNum} has unexpected format")
+		dbCur.execute("INSERT INTO types VALUES (?, ?)", (match.group(1), match.group(2)))
+
+print("Reading/storing abstracts")
+dbCur.execute("CREATE TABLE abstracts (iri TEXT PRIMARY KEY, abstract TEXT)")
+descLineRegex = labelLineRegex
+lineNum = 0
+with bz2.open(abstractsFile, mode='rt') as file:
+	for line in file:
+		lineNum += 1
+		if lineNum % 1e5 == 0:
+			print(f"At line {lineNum}")
+		#
+		if line[0] == "#":
+			continue
+		match = descLineRegex.fullmatch(line)
+		if match == None:
+			raise Exception(f"ERROR: Line {lineNum} has unexpected format")
+		dbCur.execute("INSERT INTO abstracts VALUES (?, ?)",
+			(match.group(1), match.group(2).replace(r'\"', '"')))
+
+print("Closing database")
+dbCon.commit()
+dbCon.close()